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Text File | 1990-03-09 | 59KB | 1,195 lines

.RR--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--!--! .PL 62 .LM 1 .RM 78 .MT3 .MB4 .HM1 .FM1 .PO10 .CW10 .SR2 .UJ0 .OJ0 .UL1 .heScanner Devices 3/9/90 .foSCSI-2 draft proposed American National Standard 14-# Revision 10c .pn 1 .cp 30 .aw off .pm 0 14. Scanner Devices .aw on .pm 3 .cp 20 .aw off .pm 0 14.1. Mode∞ fo≥ Scanne≥ Devices .aw on .pm 3 ááScanne≥ device≤ generatσ ß digita∞ representatioε oµ tw∩ o≥ threσ ì dimensiona∞ object≤ (e.g.¼ ß pagσ oµ text¼ ß photograph¼ o≥ ß piecσ oµ art)« ì Thi≤ i≤ accomplisheΣ b∙ sensinτ thσ amoun⌠ oµ ligh⌠ reflecteΣ froφ thσ objec⌠ ì anΣ generatinτ thσ digita∞ data« Thσ digita∞ datß caε theε bσ sen⌠ acros≤ thσ ì SCS╔ bu≤ t∩ aε initiato≥ fo≥ furthe≥ processing. ááTherσ arσ tw∩ type≤ oµ scanner≤ iε use╗ iε onσ type¼ thσ operation≤ anΣ ì function≤ oµ thσ scanne≥ arσ fixed╗ iε thσ othe≥ type¼ thσ operation≤ anΣ ì function≤ arσ programmablσ anΣ neeΣ t∩ bσ se⌠ u≡ prio≥ t∩ beinτ useΣ fo≥ ì scanninτ objects. ááThσ scanne≥ devicσ generate≤ thσ datß anΣ transfer≤ i⌠ iε accordancσ witΦ ì thσ command≤ receiveΣ froφ thσ initiator« Thσ content≤ oµ thσ datß i≤ vendo≥ ì specific¼ thereforσ thσ initiato≥ anΣ thσ scanne≥ mus⌠ kno≈ ho≈ t∩ usσ thσ ì content≤ oµ thσ data. ááScanner≤ generatσ ß digita∞ imagσ oµ aε objec⌠ iε ß tw∩ dimensiona∞ plane« ì Thσ °-axi≤ dimensioε i≤ alonτ thσ cros≤-scaε directioε whicΦ i≤ perpendicula≥ ì t∩ thσ directioε iε whicΦ ß scaε occurs« Thσ ∙-axi≤ dimensioε i≤ alonτ thσ ì scaε directioε anΣ i≤ paralle∞ t∩ thσ directioε iε whicΦ ß scaε occurs« Thσ ì coordinate≤ arσ measureΣ froφ thσ uppe≥ lef⌠ hanΣ corne≥ oµ thσ tw∩ ì dimensiona∞ plane« Thσ °-axi≤ measuremen⌠ increase≤ iε ß positivσ manne≥ ì goinτ froφ lef⌠ t∩ right« Thσ lef⌠ sidσ oµ thσ thσ tw∩ dimensiona∞ planσ ì (i.e.¼ wherσ ° equal≤ zero⌐ i≤ calleΣ thσ basσ elemen⌠ line« Thσ ∙-axi≤ ì measuremen⌠ increase≤ iε ß positivσ manne≥ goinτ froφ to≡ t∩ bottom« Thσ to≡ ì sidσ oµ thσ tw∩ dimensiona∞ planσ (i.e« wherσ ∙ equal≤ zero⌐ i≤ calleΣ thσ ì basσ line« Thσ scanninτ rangσ encompasse≤ thσ areß iε whicΦ thσ scanne≥ caε ì operate« I⌠ i≤ thσ areß froφ thσ scaε linσ anΣ basσ linσ t∩ thσ maximuφ ° anΣ ì ∙ position« Thesσ convention≤ arσ adopteΣ t∩ aiΣ iε understandinτ thσ field≤ ì withiε thσ commanΣ descripto≥ block≤ anΣ parameter≤ useΣ fo≥ scanne≥ devices« ì A≤ sucΦ thi≤ i≤ ß conceptua∞ mode∞ anΣ ma∙ no⌠ accuratel∙ reflec⌠ thσ physica∞ ì device. ááThσ displacement≤ useΣ fo≥ positioninτ window≤ i≤ independen⌠ oµ thσ ì resolutioε witΦ whicΦ ß windo≈ i≤ scanned« Thσ measuremen⌠ oµ displacement≤ ì i≤ controlleΣ b∙ thσ scaε measuremen⌠ modσ parameters. ááIε thσ even⌠ oµ ß scanne≥ automatiπ creatioε oµ suΓ-window≤ withiε ß defineΣ ì windo≈ (i.e.¼ thσ aut∩ bi⌠ iε thσ DEFIN┼ WINDO╫ parameter≤ i≤ one)¼ onσ oµ thσ ì followinτ response≤ i≤ appropriate: áá1⌐ thσ initiato≥ ma∙ issuσ ß GE╘ WINDO╫ PARAMETER╙ commanΣ prio≥ t∩ an∙ ì REA─ commands áá2⌐ iµ thσ initiato≥ issue≤ ß REA─ commanΣ beforσ issuinτ ß GE╘ WINDO╫ ì PARAMETER╙ command¼ thσ targe⌠ shal∞ returε CHEC╦ CONDITIO╬ status« Thσ IL╔ ì anΣ valiΣ bit≤ iε thσ sensσ datß shal∞ bσ se⌠ t∩ one« Thσ initiato≥ shoulΣ ì theε issuσ ß GE╘ WINDO╫ PARAMETER╙ command« Thi≤ featurσ i≤ usefu∞ wheε thσ ì scanne≥ ha≤ thσ abilit∙ t∩ distinguisΦ betweeε imagσ anΣ tex⌠ datß anΣ t∩ ì definσ window≤ accordingly. .cp 10èááI⌠ ma∙ occu≥ tha⌠ ß scanne≥ devicσ temporaril∙ doe≤ no⌠ havσ resource≤ ì availablσ t∩ managσ ß datß transfe≥ froφ thσ initiato≥ o≥ doe≤ no⌠ havσ datß ì availablσ t∩ transfe≥ t∩ thσ initiator« Onσ oµ thσ followinτ response≤ i≤ ì appropriatσ iε sucΦ ß case║ áá1⌐ ┴ CHEC╦ CONDITIO╬ statu≤ i≤ returneΣ anΣ thσ sensσ ke∙ i≤ se⌠ t∩ NO╘ ì READ┘ witΦ thσ appropriatσ additiona∞ sensσ code« Thi≤ i≤ responsσ i≤ ì applicablσ t∩ ß TES╘ UNI╘ READ┘ command. áá2⌐ Thσ targe⌠ disconnect≤ unti∞ thσ resourcσ o≥ datß i≤ available¼ anΣ theε ì rσ-connect≤ t∩ resumσ thσ operation. áá3⌐ ┴ BUS┘ statu≤ i≤ returned. .cp 4 ááIµ thσ scanne≥ devicσ determine≤ tha⌠ aε erro≥ o≥ exceptioε conditioε ha≤ ì occurreΣ whilσ executinτ thσ SCS╔ commanΣ froφ thσ initiator¼ ß CHEC╦ ì CONDITIO╬ statu≤ i≤ returned« ┴ REQUES╘ SENS┼ commanΣ caε theε bσ useΣ t∩ ì determinσ additiona∞ informatioε regardinτ thσ erro≥ o≥ exceptioε condition. .cp 44è.aw off .pm 0 14.2. Command≤ fo≥ Scanne≥ Devices .aw on .pm 3 ááThσ command≤ fo≥ scanne≥ device≤ shal∞ bσ a≤ showε iε Tablσ 1┤-1. .aw off .pm 0 .cp 35 Table 14-1: Commands for Scanner Devices ============================================================================== Operation Command Name Code Type Section Page ------------------------------------------------------------------------------ CHANG┼ DEFINITIO╬ 40h ╧ 7.2.1 COMPARE 39h O 7.2.2 COPY 18h O 7.2.3 COPY AND VERIFY 3Ah O 7.2.4 GET DAT┴ BUFFE╥ STATUS 34h O 14.2.1 GET WINDOW 25h O 14.2.2 INQUIRY 12h M 7.2.5 LOG SELECT 4Ch O 7.2.6 LOG SENS┼ 4Dh O 7.2.7 MODE SELECT(6) 15h O 7.2.8 MODE SELECT(10) 55h O 7.2.9 MODE SENSE(6) 1Ah O 7.2.10 MODE SENSE(10) 5Ah O 7.2.11 OBJECT POSITION 31h O 14.2.3 READ 28h M 14.2.4 READ BUFFER 3Ch O 7.2.12 RECEIVE DIAGNOSTIC RESULTS 1Ch O 7.2.13 RELEASE UNIT 17h M 9.2.9 REQUEST SENSE 03h M 7.2.14 RESERVE UNIT 16h M 9.2.10 SCAN 1Bh O 14.2.5 SET WINDOW 24h M 14.2.6 SEND 2Ah O 14.2.7 SEND DIAGNOSTIC 1Dh M 7.2.15 TEST UNIT READY 00h M 7.2.16 WRITE BUFFER 3Bh O 7.2.17 ============================================================================== .aw on .pm 3 ááKey║ ═ ╜ CommanΣ implementatioε i≤ mandatory. áá ╧ ╜ CommanΣ implementatioε i≤ optional. ááAl∞ othe≥ operatioε code≤ fo≥ scanne≥ device≤ arσ reserveΣ fo≥ futurσ ì standardization. .cp 30è.aw off .pm 0 14.2.1. GET DAT┴ BUFFER STATUS Command Table 14-2: GET DAT┴ BUFFER STATUS Command ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== ░ ⁿ Operatioε Codσ (34h⌐ | -----|-----------------------------------------------------------------------| 1 | Logical Unit Number | Reserved | Wait | -----|-----------------------------------------------------------------------| 2 | Reserved | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | Reserved | -----|-----------------------------------------------------------------------| 5 | Reserved | -----|-----------------------------------------------------------------------| 6 | Reserved | -----|-----------------------------------------------------------------------| 7 | (MSB) | -----|--- Allocation Length ---| 8 | (LSB) | -----|-----------------------------------------------------------------------| 9 | Control | ============================================================================== .aw on .pm 3 ááThσ GE╘ DAT┴ BUFFE╥ STATU╙ commanΣ (Tablσ 1┤-2⌐ provide≤ ß mean≤ fo≥ thσ ì initiato≥ t∩ ge⌠ informatioε abou⌠ thσ datß buffer« Informatioε i≤ returneΣ ì onl∙ fo≥ windo≈ identifier≤ fo≥ whicΦ ß SCA╬ commanΣ ha≤ beeε receiveΣ (seσ ì 14.1.9). .cp 5 áá┴ wai⌠ bi⌠ oµ zer∩ indicate≤ tha⌠ thσ targe⌠ shal∞ responΣ immediately« ┴ ì wai⌠ bi⌠ oµ onσ indicate≤ tha⌠ thσ targe⌠ shal∞ wai⌠ fo≥ imagσ datß t∩ bσ ì availablσ beforσ returninτ scaε statu≤ data« ááThσ datß buffe≥ statu≤ datß forma⌠ i≤ defineΣ iε Tablσ 1┤-3. .cp 35è.aw off .pm 0 Table 14-3: Datß Buffe≥ Status Format ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | (MSB) | -----|--- ---| 1 | Datß Buffe≥ Statu≤ Length | -----|--- ---| 2 | (LSB) | -----|-----------------------------------------------------------------------| 3 | Reserved | Block | ============================================================================== | Da⌠ß Buffe≥ Status Descriptor(s⌐ | ============================================================================== 0 | Window Identifier | -----|-----------------------------------------------------------------------| 1 | Reserved | -----|-----------------------------------------------------------------------| 2 | (MSB) | -----|--- ---| 3 | Availablσ Datß Buffer | -----|--- ---| 4 | (LSB) | -----|-----------------------------------------------------------------------| 5 | (MSB) | -----|--- ---| 6 | FilleΣ Datß Buffe≥ | -----|--- ---| 7 | (LSB) | ============================================================================== .aw on .pm 3 ááThσ datß buffe≥ statu≤ lengtΦ indicate≤ thσ lengtΦ iε byte≤ oµ thσ followinτ ì scaε statu≤ datß tha⌠ i≤ availablσ t∩ bσ transferreΣ durinτ thσ DAT┴ I╬ phase« ì Thσ datß buffe≥ statu≤ lengtΦ doe≤ no⌠ includσ itself« Thσ datß buffe≥ statu≤ ì datß transferreΣ t∩ thσ initiato≥ include≤ zer∩ o≥ morσ datß buffe≥ statu≤ ì descriptors« EacΦ descripto≥ return≤ informatioε fo≥ thσ windo≈ specifieΣ b∙ ì thσ windo≈ identifier. .cp 5 ááThσ blocδ bi⌠ specifie≤ thσ bufferinτ capabilitie≤ oµ thσ scanner« ┴ blocδ ì bi⌠ oµ onσ indicate≤ tha⌠ thσ datß buffe≥ i≤ ful∞ anΣ al∞ imagσ datß mus⌠ bσ ì transferreΣ t∩ thσ initiato≥ beforσ thσ scaε operatioε resumes« ┴ blocδ bi⌠ ì oµ zer∩ indicate≤ tha⌠ datß buffe≥ i≤ no⌠ ful∞ anΣ scaε operation≤ caε ì continuσ witΦ thσ availablσ datß buffe≥ space. .cp 3 ááThσ availablσ datß buffe≥ fielΣ indicate≤ iε bytes¼ thσ amoun⌠ oµ buffe≥ ì availablσ fo≥ transfer≤ froφ thσ initiator« Thi≤ fielΣ i≤ valiΣ onl∙ iε ì scanner≤ witΦ thσ abilit∙ t∩ accep⌠ datß froφ aε initiato≥ fo≥ processing« ááThσ filleΣ datß buffe≥ fielΣ indicate≤ thσ amoun⌠ oµ imagσ datß iε byte≤ ì availablσ fo≥ transfe≥ t∩ thσ initiator. .cp 30è.aw off .pm 0 14.2.2. GET WINDOW Command Table 14-4: GET WINDOW Command ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Operation Code (25h) | -----|-----------------------------------------------------------------------| 1 | Logical Unit Number | Reserved | Single | -----|-----------------------------------------------------------------------| 2 | Reserved | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | Reserved | -----|-----------------------------------------------------------------------| 5 | Window Identifier | -----|-----------------------------------------------------------------------| 6 | (MSB) | -----|--- ---| 7 | Transfer Length | -----|--- ---| 8 | (LSB) | -----|-----------------------------------------------------------------------| 9 | Control | ============================================================================== .aw on .pm 3 ááThσ GE╘ WINDO╫ commanΣ (Tablσ 1┤-4⌐ provide≤ ß mean≤ fo≥ thσ initiato≥ t∩ ì ge⌠ informatioε abou⌠ previousl∙ defineΣ windows. áá┴ singlσ bi⌠ oµ onσ specifie≤ tha⌠ ß singlσ windo≈ descripto≥ bσ returneΣ ì fo≥ thσ specifieΣ windo≈ identifier« ┴ singlσ bi⌠ oµ zer∩ specifie≤ tha⌠ ì windo≈ descriptor≤ bσ returneΣ fo≥ al∞ windo≈ identifier≤ tha⌠ werσ defineΣ b∙ ì ß SE╘ WINDOW╙ commanΣ o≥ b∙ thσ targe⌠ iµ thσ automatiπ bi⌠ wa≤ se⌠ t∩ one« .cp 6 ááThσ ge⌠ windo≈ datß shal∞ consis⌠ oµ ß heade≥ followeΣ b∙ onσ o≥ morσ windo≈ ì descriptor≤ (seσ Table≤ 1┤-5¼ 1┤-6¼ anΣ 1┤-7)« EacΦ windo≈ descripto≥ ì specifie≤ thσ location¼ sizσ anΣ scanninτ methoΣ useΣ fo≥ ß window« .cp 25è.aw off .pm 0 Table 14-5: Ge⌠ Window Datß Header ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | (MSB) | -----|--- Windo≈ Data Length ---| 1 | (LSB) | -----|-----------------------------------------------------------------------| 2 | Reserved | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | Reserved | -----|-----------------------------------------------------------------------| 5 | Reserved | -----|-----------------------------------------------------------------------| 6 | (MSB) | -----|--- Window Descriptor Length ---| 7 | (LSB) | ============================================================================== .aw on .pm 3 ááThσ windo≈ datß lengtΦ specifie≤ thσ lengtΦ iε byte≤ oµ thσ followinτ datß ì tha⌠ i≤ availablσ t∩ bσ transferred« Thσ windo≈ datß lengtΦ doe≤ no⌠ includσ ì itself« Iµ thσ allocatioε lengtΦ i≤ no⌠ sufficien⌠ t∩ returε al∞ thσ ge⌠ ì windo≈ datß thσ windo≈ datß lengtΦ shal∞ no⌠ bσ adjusteΣ t∩ reflec⌠ thσ ì truncatioε data« ááThσ windo≈ descripto≥ lengtΦ specifie≤ thσ lengtΦ iε byte≤ oµ ß singlσ ì windo≈ descriptor« EacΦ descripto≥ shal∞ bσ oµ equa∞ length« Thσ firs⌠ ì fort∙-eigh⌠ byte≤ arσ defineΣ iε thi≤ standarΣ anΣ thσ remaininτ byte≤ iε eacΦ ì descripto≥ arσ vendo≥ specific. .cp 38è.aw off .pm 0 Table 14-6: Window Descripto≥ Byte≤ (1-23) ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Window Identifier | -----|-----------------------------------------------------------------------| 1 | Reserved | Auto | -----|-----------------------------------------------------------------------| 2 | (MSB) | -----|--- X-Axi≤ Resolution ---| 3 | (LSB) | -----|-+---------------------------------------------------------------------| 4 | (MSB) | -----|--- Y-Axi≤ Resolution ---| 5 | (LSB) | -----|-----------------------------------------------------------------------| 6 | (MSB) | ¡ ¡ -|¡ ¡ - X-Axi≤ Upper Left ¡ ¡ -| 9 | (LSB) | -----|-----------------------------------------------------------------------| 10 | (MSB) | ¡ ¡ -|¡ ¡ - ┘-Axi≤ Upper Left ¡ ¡ -| 13 | (LSB) | -----|-----------------------------------------------------------------------| 14 | (MSB) | ¡ ¡ -|¡ ¡ - Windo≈ Width ¡ ¡ -| 17 | (LSB) | -----|-----------------------------------------------------------------------| 18 | (MSB) | ¡ ¡ -|¡ ¡ - Windo≈ Length ¡ ¡ -| 21 | (LSB) | -----|-----------------------------------------------------------------------| 22 | Brightness | -----|-----------------------------------------------------------------------| 23 | Threshold | ============================================================================== .cp 35è.aw off .pm 0 Table 14-7: Window Descripto≥ Byte≤ (2┤ ¡ 39) ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 24 | Contrast | -----|-----------------------------------------------------------------------| 25 | Image Composition | -----|-----------------------------------------------------------------------| 26 | Bits Per Pixel | -----|-----------------------------------------------------------------------| 27 | (MSB) | -----|-+- Halftone Pattern ---| 2╕ | (LSB) | -----|-----------------------------------------------------------------------| 29 | RIF | Reserved | Padding Type | -----|-----------------------------------------------------------------------| 30 | (MSB) | -----|--- Bit Ordering ---| 31 | (LSB) | -----|-+---------------------------------------------------------------------| 32 | Compression Type | -----|-----------------------------------------------------------------------| 33 | Compression Argument | -----|-----------------------------------------------------------------------| 3┤ toⁿ | ¡ ¡ ¡|¡ ¡ - Reserved - - -| 39 | | -----|-----------------------------------------------------------------------| 4░ to| | ¡ ¡ -|¡ ¡ ¡ Vendo≥ Specifiπ Paramete≥ Byte(s) ¡ ¡ ¡| n | | ============================================================================== .aw on .pm 3 ááThσ windo≈ identifie≥ specifie≤ thσ windo≈ defineΣ b∙ thσ windo≈ descriptor« ì ┴ windo≈ i≤ referenceΣ b∙ thσ windo≈ identifie≥ durinτ datß transfer≤ anΣ ì paramete≥ updates. .. HOW DOES THE WINDOW IDENTIFIER RELATE TO DATA TRANSFERS? .. WHAT HAPPENS IF THE INITIATOR ASSIGNS A DUPLICATE WINDOW IDENTIFIER? ááWheε useΣ witΦ thσ SE╘ WINDO╫ command¼ aε automatiπ (auto⌐ bi⌠ oµ onσ ì indicate≤ tha⌠ thσ targe⌠ i≤ alloweΣ t∩ creatσ suΓ-window≤ withiε thσ windo≈ ì specified« Aε aut∩ bi⌠ oµ zer∩ indicate≤ tha⌠ targe⌠ i≤ no⌠ alloweΣ t∩ creatσ ì suΓ-windows. ááWheε useΣ witΦ thσ GE╘ WINDO╫ command¼ aε aut∩ bi⌠ oµ zer∩ indicate≤ tha⌠ ì thσ windo≈ wa≤ defineΣ directl∙ b∙ thσ SE╘ WINDO╫ command« ┴ valuσ oµ onσ ì indicate≤ tha⌠ thσ windo≈ wa≤ defineΣ b∙ thσ target« Thi≤ i≤ ß suΓ-windo≈ ì withiε ß windo≈ defineΣ b∙ ß SE╘ WINDO╫ command. ááThσ windo≈ identifier≤ assigneΣ b∙ thσ targe⌠ shal∞ bσ uniquσ anΣ no⌠ ì currentl∙ iε use« Thσ parameter≤ fo≥ thσ suΓ-window≤ ma∙ bσ retrieveΣ usinτ ì thσ GE╘ WINDO╫ command. .cp 3èááThσ °-axi≤ resolutioε fielΣ specifie≤ thσ resolutioε iε thσ scaε linσ ì direction« Thσ uni⌠ oµ measurσ i≤ picturσ element≤ (pixels⌐ pe≥ inch« ┴ ì valuσ oµ zer∩ specifie≤ thσ defaul⌠ resolution« .cp 3 ááThσ ∙-axi≤ resolutioε fielΣ specifie≤ thσ resolutioε iε thσ basσ linσ ì direction« Thσ uni⌠ oµ measurσ i≤ scaε line≤ pe≥ inch« ┴ valuσ oµ zer∩ ì specifie≤ thσ defaul⌠ resolution« ááThσ °-axi≤ uppe≥ lef⌠ fielΣ specifie≤ thσ °-axi≤ coordinatσ oµ thσ uppe≥ ì lef⌠ corne≥ oµ thσ window« Thi≤ coordinatσ i≤ measureΣ froφ thσ scaε linσ ì usinτ thσ target'≤ curren⌠ measuremen⌠ uni⌠ diviso≥ (seσ 14.3.3.1). ááThσ ∙-axi≤ uppe≥ lef⌠ fielΣ specifie≤ thσ ∙-axi≤ coordinatσ oµ thσ uppe≥ ì lef⌠ corne≥ oµ thσ window« Thi≤ coordinatσ i≤ measureΣ froφ thσ basσ linσ ì usinτ target'≤ curren⌠ measuremen⌠ uni⌠ diviso≥ (seσ 14.3.3.1). ááThσ windo≈ widtΦ fielΣ specifie≤ thσ widtΦ oµ windo≈ iε thσ scaε linσ ì direction« Thσ windo≈ widtΦ i≤ measureΣ usinτ thσ target'≤ curren⌠ ì measuremen⌠ uni⌠ diviso≥ (seσ 14.3.3.1). ááThσ windo≈ lengtΦ fielΣ specifie≤ thσ lengtΦ oµ thσ windo≈ iε thσ basσ linσ ì direction« Thσ windo≈ lengtΦ i≤ measureΣ usinτ thσ target'≤ curren⌠ ì measuremen⌠ uni⌠ diviso≥ (seσ 14.3.3.1). ááThσ brightnes≤ fielΣ specifie≤ thσ leve∞ oµ brightnes≤ useΣ t∩ scaε thσ ì object« ┴ valuσ oµ zer∩ specifie≤ thσ defaul⌠ brightnes≤ o≥ automatiπ ì brightnes≤ contro∞ iµ i⌠ i≤ supported« An∙ othe≥ valuσ indicate≤ ß relativσ ì brightnes≤ settinτ witΦ 25╡ beinτ thσ highes⌠ setting¼ onσ beinτ thσ lowes⌠ ì setting¼ anΣ 12╕ beinτ thσ nomina∞ setting. ááThσ thresholΣ fielΣ specifie≤ thσ thresholΣ a⌠ whicΦ scaε datß i≤ converteΣ ì t∩ binar∙ data« ┴ valuσ oµ zer∩ specifie≤ thσ thσ defaul⌠ thresholΣ o≥ ì automatiπ thresholΣ contro∞ iµ i⌠ i≤ supported« An∙ othe≥ valuσ indicate≤ ì relativσ thresholΣ settinτ witΦ 25╡ beinτ thσ highes⌠ setting¼ onσ beinτ thσ ì lowes⌠ setting¼ anΣ 12╕ beinτ thσ nomina∞ setting. .cp 5 ááThσ contras⌠ fielΣ specifie≤ thσ leve∞ oµ contras⌠ useΣ t∩ scaε thσ object« ì ┴ valuσ oµ zer∩ specifie≤ thσ defaul⌠ contras⌠ o≥ automatiπ contras⌠ contro∞ ì iµ i⌠ i≤ supported« An∙ othe≥ valuσ indicate≤ ß relativσ contras⌠ settinτ ì witΦ 25╡ beinτ thσ highes⌠ setting¼ onσ beinτ thσ lowes⌠ setting¼ anΣ 12╕ ì beinτ thσ nomina∞ setting. .cp 3 ááThσ halftonσ fielΣ specifie≤ thσ leve∞ oµ halftonσ a⌠ whicΦ thσ scaε datß i≤ ì converteΣ t∩ binar∙ data« Thσ value≤ iε thi≤ fielΣ arσ vendo≥ specific« Thσ ì halftonσ fielΣ i≤ useΣ iε conjunctioε witΦ thσ imagσ compositioε field. .cp 2 ááThσ imagσ compositioε fielΣ specifie≤ thσ typσ oµ scaε operatioε requested« ì Thσ imagσ compositioε i≤ defineΣ a≤ showε iε Tablσ 1┤-8. .cp 13è.aw off .pm 0 Table 14-8: Imagσ Composition Codes ============================================================================== Code Description ------------------------------------------------------------------------------ 00h Bi-level black & white 01h Dithered/halftone black & white 02h Multi-level black & white (gray scale) 03h Bi-level RGB Color 04h Dithered/halftone RGB Color 05h Multi-level RGB Color 06h - FFh Reserved ============================================================================== .aw on .pm 3 ááThσ bit≤ pe≥ pixe∞ fielΣ specifie≤ thσ numbe≥ oµ bit≤ useΣ t∩ represen⌠ thσ ì intensit∙ oµ ß singlσ color. áá┴ reversσ imagσ forma⌠ (RIF⌐ bi⌠ oµ zer∩ indicate≤ tha⌠ whitσ pixel≤ arσ t∩ ì bσ indicateΣ b∙ zero≤ anΣ blacδ pixel≤ arσ t∩ bσ indicateΣ b∙ ones« ┴ RI╞ bi⌠ ì oµ onσ indicate≤ tha⌠ whitσ pixel≤ arσ t∩ bσ indicateΣ b∙ one≤ anΣ blacδ ì pixel≤ arσ t∩ bσ indicateΣ b∙ zeros« Thσ RI╞ bi⌠ i≤ applicablσ onl∙ fo≥ ì image≤ representeΣ b∙ onσ bi⌠ pe≥ pixel« ááThσ paddinτ typσ fielΣ specifie≤ ho≈ thσ targe⌠ shal∞ paΣ thσ imagσ datß ì transmitteΣ t∩ thσ initiato≥ iµ i⌠ i≤ no⌠ aε integra∞ numbe≥ oµ bytes« Thσ ì paddinτ typσ i≤ defineΣ iε Tablσ 1┤-9. .cp 10 .aw off .pm 0 Table 14-9: Padding Types ============================================================================== Code Description ------------------------------------------------------------------------------ 00h No padding 01h Pad with 0's to byte boundary 02h Pad with 1's to byte boundary 03h Truncate to byte boundary 04h - 07h Reserved ============================================================================== .aw on .pm 3 .cp 5 ááThσ bi⌠ orderinτ fielΣ specifie≤ thσ orde≥ iε whicΦ datß i≤ transferreΣ t∩ ì thσ hos⌠ froφ thσ window« Thσ bi⌠ orderinτ specifie≤ thσ directioε oµ pixel≤ ì iε ß scaε line¼ thσ directioε oµ scaε line≤ withiε ß windo≈ anΣ thσ imagσ datß ì packinτ withiε ß byte« Thσ value≤ iε thi≤ fielΣ arσ vendo≥ specific« ..THIS FIELD SHOULD BE VENDOR-SPECIFIC IF IT IS NOT DEFINED .cp 5 ááThσ compressioε typσ anΣ compressioε argumen⌠ field≤ specif∙ thσ compressioε ì techniquσ t∩ bσ applieΣ t∩ thσ imagσ datß (seσ Tablσ 1┤-10). .cp 15è.aw off .pm 0 Table 14-10: Compression Types and Arguments ============================================================================== Compressioε Description Compression Codσ Argumen⌠ ------------------------------------------------------------------------------ 00h No compression Reserved 01h CCITT Group III, 1 dimensional Reserved 02h CCITT Group III, 2 dimensional K factor 03h CCITT Group IV, 2 dimensional Reserved 04h - 0Fh Reserved Reserved 10h Optical Character Recognition (OCR) Vendor Specific 11h - 7Fh Reserved Reserved 80h - FFh Vendor Specific Vendor Specific ============================================================================== .aw on .pm 3 .cp 35 .aw off .pm 0 14.2.3. OBJECT POSITION Command Table 14-11: OBJECT POSITION Command ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Operation Code (31h) | -----|-----------------------------------------------------------------------| 1 | Logical Unit Number | Reserved | Position Function | -----|-----------------------------------------------------------------------| 2 | (MSB) | -----|--- ---| 3 | Count | -----|--- ---| 4 | (LSB) | -----|-----------------------------------------------------------------------| 5 | Reserved | -----|-----------------------------------------------------------------------| 6 | Reserved | -----|-----------------------------------------------------------------------| 7 | Reserved | -----|-----------------------------------------------------------------------| 8 | Reserved | -----|-----------------------------------------------------------------------| 9 | Control | ============================================================================== .aw on .pm 3 .cp 4 ááThσ OBJEC╘ POSITIO╬ commanΣ (Tablσ 1┤-11⌐ provide≤ positioninτ functions« ì Absolutσ a≤ wel∞ a≤ relativσ positioninτ i≤ provided« ┴ targe⌠ shal∞ returε ì CHEC╦ CONDITIO╬ statu≤ anΣ se⌠ thσ sensσ ke∙ t∩ ILLEGA╠ REQUES╘ iµ ß ì positioninτ functioε i≤ requesteΣ tha⌠ i≤ no⌠ supported. .cp 2 ááThσ positioε functioε fielΣ specifie≤ thσ requesteΣ functioε (seσ Tablσ 1┤-ì 12).è .cp 2 ááThσ coun⌠ fielΣ i≤ useΣ witΦ thσ positioε functioε t∩ specif∙ thσ ì displacemen⌠ oµ thσ object. .aw off .pm 0 .cp 15 Table 14-12: Positioε Function ======================================= Position Functioε Description ----------------- -------------------- 000b Unload Object 001b Load Object ░10b Absolute Positioning 011b Relative Positioning 100b Rotate Object 101b Reserved 110b Reserved 111b Reserved ======================================= .aw on .pm 3 .pm 0 .cp 8 UnloaΣ Object.é Thi≤ positioε functioε specifie≤ tha⌠ thσ objec⌠ shal∞ bσ ì positioneΣ fo≥ removal« Iµ upoε receip⌠ oµ thi≤ commanΣ therσ i≤ n∩ objec⌠ ì loaded¼ thσ targe⌠ shal∞ returε ß GOO─ status« Thi≤ conditioε shal∞ no⌠ bσ ì considereΣ a≤ aε error« Iµ thσ targe⌠ i≤ unablσ t∩ unloaΣ thσ objec⌠ (i.e.¼ ì pape≥ jaφ o≥ misfeeΣ condition)¼ thσ targe⌠ shal∞ returε CHEC╦ CONDITIO╬ ì statu≤ anΣ se⌠ thσ sensσ ke∙ sensσ t∩ MEDIU═ ERROR. .cp 6 LoaΣ object.é Thi≤ positioε functioε specifie≤ tha⌠ thσ objec⌠ i≤ t∩ bσ loadeΣ ì anΣ positioneΣ t∩ thσ basσ line« Iµ upoε receip⌠ oµ thi≤ commanΣ therσ i≤ ß ì objec⌠ alread∙ loaded¼ thσ targe⌠ shal∞ return≤ GOO─ status« Thi≤ conditioε ì shal∞ no⌠ bσ considereΣ a≤ aε error« Iµ aε objec⌠ i≤ no⌠ loadeΣ anΣ thσ ì targe⌠ i≤ unablσ t∩ loaΣ aε object¼ thσ targe⌠ shal∞ returε CHEC╦ CONDITIO╬ ì statu≤ anΣ se⌠ thσ EO═ bi⌠ t∩ onσ anΣ thσ sensσ ke∙ t∩ MEDIU═ ERROR. .cp 5 Absolutσ Positioning.é Thi≤ positioε functioε specifie≤ tha⌠ thσ objec⌠ i≤ t∩ ì bσ positioneΣ a⌠ ß ∙-axi≤ displacemen⌠ froφ thσ basσ line« Thσ ∙-axi≤ ì displacemen⌠ i≤ determineΣ usinτ thσ coun⌠ fielΣ anΣ thσ target'≤ curren⌠ ì measuremen⌠ uni⌠ diviso≥ (seσ 14.3.3.1)« ┴ coun⌠ fielΣ oµ zer∩ position≤ thσ ì objec⌠ a⌠ thσ basσ line« .cp 5 ááAn∙ othe≥ valuσ iε thσ coun⌠ fielΣ shal∞ causσ thσ targe⌠ t∩ positioε thσ ì objec⌠ tha⌠ numbe≥ oµ unit≤ iε thσ scaε linσ direction« Iµ therσ i≤ n∩ objec⌠ ì loadeΣ o≥ iµ thσ specifieΣ ∙-axi≤ displacemen⌠ i≤ no⌠ achieveΣ thσ targe⌠ ì shal∞ returε CHEC╦ CONDITIO╬ statu≤ anΣ se⌠ thσ EO═ bi⌠ t∩ onσ anΣ thσ sensσ ì ke∙ t∩ MEDIU═ ERROR. .pm 0 .cp 5 Relativσ Positioning.é Thi≤ positioε functioε specifie≤ tha⌠ thσ objec⌠ i≤ t∩ ì bσ positioneΣ a⌠ ß ∙-axi≤ displacemen⌠ relativσ t∩ thσ curren⌠ position« Thσ ì ∙-axi≤ displacemen⌠ i≤ determineΣ usinτ thσ coun⌠ fielΣ anΣ thσ target'≤ ì curren⌠ measuremen⌠ uni⌠ diviso≥ (seσ 14.3.3.1)« ┴ coun⌠ fielΣ oµ zer∩ cause≤ ì n∩ changσ iε positioε oµ thσ object« .cp 6èáá┴ positivσ valuσ iε thσ coun⌠ fielΣ shal∞ causσ thσ targe⌠ t∩ positioε thσ ì objec⌠ tha⌠ numbe≥ oµ unit≤ iε thσ scaε linσ direction« Iµ thσ scaε rangσ i≤ ì exceedeΣ thσ targe⌠ shal∞ returε CHEC╦ CONDITIO╬ status« Thσ EO═ bi⌠ i≤ se⌠ ì t∩ one¼ thσ IL╔ bi⌠ i≤ se⌠ t∩ one¼ anΣ sensσ ke∙ i≤ se⌠ t∩ MEDIU═ ERROR« Thσ ì valiΣ bi⌠ i≤ se⌠ t∩ onσ anΣ thσ informatioε byte≤ arσ se⌠ t∩ thσ differencσ ì (residue⌐ betweeε thσ requesteΣ coun⌠ anΣ thσ actua∞ numbe≥ oµ unit≤ moved« .cp 10 áá┴ negativσ valuσ (e.g.¼ two≤ complemen⌠ notation⌐ iε thσ coun⌠ fielΣ shal∞ ì causσ thσ targe⌠ t∩ positioε thσ objec⌠ tha⌠ numbe≥ oµ unit≤ towarΣ thσ basσ ì line« Iµ therσ i≤ n∩ objec⌠ loadeΣ o≥ iµ thσ specifieΣ ∙-axi≤ displacemen⌠ i≤ ì no⌠ achieveΣ thσ targe⌠ shal∞ returε CHEC╦ CONDITIO╬ statu≤ anΣ se⌠ thσ EO═ ì bi⌠ t∩ onσ anΣ thσ sensσ ke∙ t∩ MEDIU═ ERROR« Iµ thσ basσ linσ i≤ encountereΣ ì thσ targe⌠ shal∞ positioε thσ objec⌠ a⌠ thσ basσ linσ anΣ returε CHEC╦ ì CONDITIO╬ status« Thσ IL╔ bi⌠ i≤ se⌠ t∩ onσ anΣ thσ sensσ ke∙ i≤ se⌠ t∩ ì MEDIU═ ERROR« Thσ valiΣ bi⌠ i≤ se⌠ t∩ onσ anΣ thσ informatioε byte≤ arσ se⌠ ì t∩ thσ differencσ (residue⌐ betweeε thσ requesteΣ coun⌠ anΣ thσ actua∞ numbe≥ ì oµ unit≤ moved. .pm 0 .cp 3 Rotatσ object.é Thi≤ positioε functioε specifie≤ tha⌠ thσ objec⌠ i≤ t∩ bσ ì rotateΣ iε ß counte≥-clockwisσ directioε iε unit≤ oµ onσ onσ-thousandtΦ oµ ß ì degree« Thσ coun⌠ fielΣ specifie≤ thσ numbe≥ oµ unit≤ tha⌠ thσ objec⌠ i≤ t∩ ì bσ moved. .cp 30 .aw off .pm 0 14.2.4. READ Command Table 14-13: READ Command ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Operation Code (28h) | -----|-----------------------------------------------------------------------| 1 | Logical Unit Number | Reserved | -----|-----------------------------------------------------------------------| 2 | Data Typσ Code | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | (MSB) | -----|--- Datß Typσ Qualifie≥ ---| 5 | (LSB) | -----|-----------------------------------------------------------------------| 6 | (MSB) | -----|--- ---| 7 | Transfer Length | -----|--- ---| 8 | (LSB) | -----|-----------------------------------------------------------------------| 9 | Control | ============================================================================== .aw on .pm 3 .cp 2 ááThσ REA─ commanΣ (Tablσ 1┤-13⌐ request≤ tha⌠ thσ targe⌠ transfe≥ datß t∩ thσ ì initiator.è .cp 3 ááThσ transfe≥ datß typσ distinguishe≤ betweeε thσ differen⌠ type≤ oµ datß ì whicΦ ma∙ bσ transferreΣ betweeε thσ initiato≥ anΣ thσ target« Thσ type≤ oµ ì transfer≤ arσ specifieΣ iε Tablσ 1┤-14. .cp 15 .aw off .pm 0 Table 14-14: Datß Type Codes ========================================================== Code Description ---------------------------------------------------------- 00h Image 0▒Φ Vendo≥ Specific 02h Halftone Mask 03h Gamma Function 04h - 7Fh Reserved 80h - FFh Vendor Specific ========================================================== .aw on .pm 3 ááThσ datß typσ qualifie≥ fielΣ provide≤ ß mean≤ t∩ differentiatσ datß ì transfer≤ oµ thσ samσ datß typσ code« Thσ value≤ useΣ iε thi≤ fielΣ arσ ì vendo≥ specific« ááThσ transfe≥ lengtΦ specifie≤ thσ numbe≥ oµ block≤ thσ targe⌠ shal∞ transfe≥ ì t∩ thσ initiato≥ durinτ thσ DAT┴ I╬ phase« Thσ blocδ sizσ i≤ thσ curren⌠ ì blocδ sizσ iε thσ modσ parameter≤ blocδ descripto≥ (seσ 7.3.3)« ┴ transfe≥ ì lengtΦ oµ zero¼ i≤ no⌠ considereΣ aε erro≥ anΣ n∩ datß shal∞ bσ transferred« ááIµ thσ targe⌠ transfer≤ les≤ thaε transfe≥ lengtΦ block≤ ß CHEC╦ CONDITIO╬ ì statu≤ shal∞ bσ returned« Thσ IL╔ bi⌠ i≤ se⌠ t∩ one¼ thσ valiΣ bi⌠ i≤ se⌠ t∩ ì one¼ anΣ thσ informatioε byte≤ arσ se⌠ t∩ thσ differencσ (residue⌐ betweeε thσ ì requesteΣ transfe≥ lengtΦ anΣ thσ actua∞ numbe≥ oµ block≤ transferred« ááThi≤ commanΣ shal∞ bσ terminateΣ witΦ ß statu≤ oµ RESERVATIO╬ CONFLIC╘ iµ ì an∙ reservatioε acces≤ conflic⌠ (seσ 9.2.10⌐ exist≤ anΣ n∩ datß shal∞ bσ ì transferred. .cp 22è.aw off .pm 0 14.2.5. SCAN Command Table 14-15: SCAN Command ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Operation Code (1Bh) | -----|-----------------------------------------------------------------------| 1 | Logical Unit Number | Reserved | -----|-----------------------------------------------------------------------| 2 | Reserved | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | Transfer Length | -----|-----------------------------------------------------------------------| 5 | Control | ============================================================================== .aw on .pm 3 ááThσ SCA╬ commanΣ (Tablσ 1┤-15⌐ request≤ thσ targe⌠ begiε ß scaε operation. ááThσ transfe≥ lengtΦ specifie≤ thσ lengtΦ iε byte≤ oµ thσ windo≈ identifie≥ ì lis⌠ tha⌠ shal∞ bσ sen⌠ durinτ thσ DAT┴ OU╘ phase« ┴ transfe≥ lengtΦ oµ zer∩ ì indicate≤ tha⌠ n∩ datß shal∞ bσ transferred« Thi≤ conditioε shal∞ no⌠ bσ ì considereΣ a≤ aε error. ááThσ windo≈ identifie≥ lis⌠ consist≤ oµ zer∩ o≥ morσ windo≈ identifier≤ eacΦ ì oµ whicΦ specifie≤ ß windo≈ t∩ bσ scanned« .cp 30è.aw off .pm 0 14.2.6. SEND Command Table 14-16: SEND Command ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Operation Code (2Ah) | -----|-----------------------------------------------------------------------| 1 | Logical Unit Number | Reserved | -----|-----------------------------------------------------------------------| 2 | Data Typσ Codσ | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | (MSB) | -----|--- Datß Typσ Qualifie≥ ---| 5 | (LSB) | -----|-----------------------------------------------------------------------| 6 | (MSB) | -----|--- ---| 7 | Transfer Length | -----|--- ---| 8 | (LSB) | -----|-----------------------------------------------------------------------| 9 | Control | ============================================================================== .aw on .pm 3 ááThσ SEN─ commanΣ (Tablσ 1┤-16⌐ transfer≤ datß froφ thσ initiato≥ t∩ thσ ì target. ááThσ datß typσ codσ anΣ datß typσ qualifie≥ arσ defineΣ iε thσ REA─ commanΣ ì (seσ 14.2.5)« ááThσ transfe≥ lengtΦ specifie≤ thσ numbe≥ oµ block≤ thσ targe⌠ shal∞ transfe≥ ì froφ thσ initiato≥ durinτ thσ DAT┴ OU╘ phase« Thσ blocδ sizσ i≤ thσ curren⌠ ì blocδ sizσ iε thσ modσ parameter≤ blocδ descripto≥ (seσ 7.3.3)« ┴ transfe≥ ì lengtΦ oµ zero¼ i≤ no⌠ considereΣ aε erro≥ anΣ n∩ datß shal∞ bσ transferred« ááThi≤ commanΣ shal∞ bσ terminateΣ witΦ ß statu≤ oµ RESERVATIO╬ CONFLIC╘ iµ ì an∙ reservatioε acces≤ conflic⌠ (seσ 9.2.10⌐ exist≤ anΣ n∩ datß shal∞ bσ ì transferred. .cp 30è.aw off .pm 0 14.2.7. SET WINDOW Command Table 14-17: SET WINDOW Command ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Operation Code (24H) | -----|-----------------------------------------------------------------------| 1 | Logical Unit Number | Reserved | -----|-----------------------------------------------------------------------| 2 | Reserved | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | Reserved | -----|-----------------------------------------------------------------------| 5 | Reserved | -----|-----------------------------------------------------------------------| 6 | (MSB) | -----|--- ---| 7 | Transfer Length | -----|--- ---| 8 | (LSB) | -----|-----------------------------------------------------------------------| 9 | Control | ============================================================================== .aw on .pm 3 ááThσ SE╘ WINDO╫ commanΣ (Tablσ 1┤-17⌐ provide≤ ß mean≤ fo≥ thσ initiato≥ t∩ ì specif∙ onσ o≥ morσ window≤ withiε thσ scanninτ rangσ oµ thσ device. ááThσ transfe≥ lengtΦ specifie≤ thσ lengtΦ iε byte≤ oµ thσ datß tha⌠ shal∞ bσ ì sen⌠ durinτ thσ DAT┴ OU╘ phase« ┴ transfe≥ lengtΦ oµ zer∩ indicate≤ tha⌠ n∩ ì windo≈ parameter≤ datß shal∞ bσ transferred« Thi≤ conditioε shal∞ no⌠ bσ ì considereΣ a≤ aε error. ááThσ windo≈ parameter≤ datß shal∞ consis⌠ oµ ß heade≥ followeΣ b∙ onσ o≥ morσ ì windo≈ descriptor≤ (seσ Table≤ 1┤-18¼ 1┤-6¼ anΣ 1┤-7)« EacΦ windo≈ descripto≥ ì specifie≤ thσ location¼ sizσ anΣ scanninτ methoΣ useΣ fo≥ ß window« .cp 25è.aw off .pm 0 Table 14-18: Set Window Datß Heade≥ ============================================================================== Bit| 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | Byte | | | | | | | | | ============================================================================== 0 | Reserved | -----|-----------------------------------------------------------------------| 1 | Reserved | -----|-----------------------------------------------------------------------| 2 | Reserved | -----|-----------------------------------------------------------------------| 3 | Reserved | -----|-----------------------------------------------------------------------| 4 | Reserved | -----|-----------------------------------------------------------------------| 5 | Reserved | -----|-----------------------------------------------------------------------| 6 | (MSB) | -----|--- Window Descriptor Length ---| 7 | (LSB) | ============================================================================== .aw on .pm 3 ááThσ windo≈ descripto≥ lengtΦ specifie≤ thσ lengtΦ iε byte≤ oµ ß singlσ ì windo≈ descriptor« EacΦ descripto≥ shal∞ bσ oµ equa∞ length« Thσ firs⌠ ì fort∙-eigh⌠ byte≤ arσ defineΣ iε thi≤ standarΣ anΣ thσ remaininτ byte≤ iε eacΦ ì descripto≥ arσ vendo≥ specific. ááSeσ Table≤ 1┤-╢ anΣ 1┤-╖ fo≥ thσ definitioε oµ ß windo≈ descriptor. .cp 20 .aw off .pm 0 14.3. Parameter≤ fo≥ Scanner Devices .aw on .pm 3 .cp 10 .aw off .pm 0 14.3.1. Diagnostic Paramete≥s .aw on .pm 3 ááThi≤ sectioε define≤ thσ descriptor≤ anΣ page≤ fo≥ diagnostiπ parameter≤ ì useΣ witΦ scanne≥ devices« ááThσ diagnostiπ pagσ code≤ fo≥ scanne≥ device≤ arσ defineΣ iε Tablσ 1┤-19. .aw off .pm 0 .cp 15 Table 14-19: Diagnostiπ Page Codes ============================================================================== Page Code Description Section ------------------------------------------------------------------------------ ááá00h SupporteΣ Diagnostiπ Pagσs 7.3.1.1 01Φ ¡ 7Fh ReserveΣ 80Φ ¡ FFh Vendo≥-specifiπ pages ============================================================================== .aw on .pm 3 .lm 1 .cp 5è.aw off .pm 0 14.3.2. Log Paramete≥s .aw on .pm 3 ááThi≤ sectioε define≤ thσ descriptor≤ anΣ page≤ fo≥ loτ parameter≤ useΣ witΦ ì scanne≥ devices« ááThσ loτ pagσ code≤ fo≥ scanne≥ device≤ arσ defineΣ iε Tablσ 1┤-20. .aw off .pm 0 .cp 15 Table 14-20: Log Page Codes ============================================================================== Page Code Description Section ------------------------------------------------------------------------------ ááá01h Buffer Over-Run/Under-Run Page 7.3.2.1 ááá03h Erro≥ Counte≥ Pagσ (Read) Page 7.3.2.2 ááá07h Last n Error Events Page 7.3.2.3 ááá06h Non-Mediuφ Error Page 7.3.2.4 ááá00h Supported Loτ Pages 7.3.2.5 08h - 2Fh Reserved ááá3Fh Reserved 30h - 3Eh Vendo≥-specifiπ pages ============================================================================== .aw on .pm 3 .lm 1 .cp 10 .aw off .pm 0 14.3.3. Mode Paramete≥s .aw on .pm 3 ááThi≤ sectioε define≤ thσ descriptor≤ anΣ page≤ fo≥ modσ parameter≤ useΣ witΦ ì scanne≥ devices« ááThσ modσ paramete≥ list¼ includinτ thσ modσ paramete≥ heade≥ anΣ modσ blocδ ì descripto≥ i≤ defineΣ iε 7.3.3. ááThσ mediuφ-typσ codσ fielΣ i≤ containeΣ iε thσ modσ paramete≥ heade≥ (seσ ì Table≤ ╖-6▒ anΣ ╖-62)« Thi≤ fielΣ i≤ reserveΣ fo≥ scanner≤ devices. .cp 3 ááThσ devicσ specifiπ paramete≥ fielΣ i≤ containeΣ iε thσ modσ paramete≥ ì heade≥ (seσ Table≤ ╖-6▒ anΣ ╖-62)« Thi≤ fielΣ i≤ reserveΣ fo≥ scanner≤ ì devices. ááThσ densit∙ codσ fielΣ i≤ containeΣ iε thσ modσ paramete≥ blocδ descripto≥ ì (seσ Tablσ ╖-63)« Thi≤ fielΣ i≤ reserveΣ fo≥ scanner≤ devices. ááThσ modσ pagσ code≤ fo≥ scanne≥ device≤ arσ defineΣ iε Tablσ 1┤-21. .cp 16è.aw off .pm 0 Table 14-21: Modσ Page Codes ============================================================================== Page Code Description Section ------------------------------------------------------------------------------ ááá0Ah Contro∞ Mode Page 7.3.3.1 ááá02h Disconnect-Reconnect Page 7.3.3.2 ááá03Φ Measurement Unit≤ Page 14.3.3.1 ááá09h Peripheral Device Page 7.3.3.3 ááá01h Reserved 03h - 08h Reserved 0Bh - 1Fh Reserved ááá3Fh Returns all page≤ (valiΣ onl∙ fo≥ thσ MOD┼ SENS┼ command) 20h - 3Eh Vendo≥-specific page≤ (page format required) ááá00h Vendo≥ Specific (does not require page format) ============================================================================== .aw on .pm 3 .lm 1 .cp 35 .aw off .pm 0 14.3.3.1. Measuremen⌠ Unit≤ Page Table 14-22: Measuremen⌠ Unit≤ Page ============================================================================== Bitⁿ ╖ ⁿ ╢ ⁿ ╡ ⁿ ┤ ⁿ │ ⁿ ▓ ⁿ ▒ ⁿ 0 | Bytσ ⁿ ⁿ ⁿ ⁿ ⁿ ⁿ ⁿ ⁿ | ============================================================================== ░ ⁿ PS |Reservedⁿ Pagσ Codσ (03h) | -----|-----------------------------------------------------------------------| ▒ ⁿ Paramete≥ LengtΦ (06h) | -----|-----------------------------------------------------------------------| ▓ ⁿ Basiπ Measuremen⌠ Unit | -----|-----------------------------------------------------------------------| │ ⁿ ReserveΣ | -----|-----------------------------------------------------------------------| 4 ⁿ (MSB⌐ | -----|--¡ Measuremen⌠ Uni⌠ Divisor ---| 5 ⁿ (LSB) | -----|-----------------------------------------------------------------------| 6 ⁿ ReserveΣ | -----|-----------------------------------------------------------------------| 7 ⁿ ReserveΣ | ============================================================================== .aw on .pm 3 .cp5 ááThσ measuremen⌠ unit≤ pagσ (Tablσ 1┤-22⌐ specifie≤ thσ unit≤ oµ measuremen⌠ ì useΣ fo≥ calculatinτ thσ displacemen⌠ oµ windo≈ anΣ fo≥ positioninτ aε object. ááThσ measuremen⌠ unit≤ arσ independen⌠ oµ thσ horizonta∞ anΣ vertica∞ scaε ì resolutions« ááThσ parameter≤ savablσ (PS⌐ bi⌠ i≤ onl∙ useΣ witΦ thσ MOD┼ SENS┼ command« ì Thi≤ bi⌠ i≤ reserveΣ fo≥ thσ MOD┼ SELEC╘ command« ┴ P╙ bi⌠ oµ onσ indicate≤ ì tha⌠ thσ targe⌠ i≤ capablσ oµ savinτ thσ pagσ iε ß noε-volatilσ vendo≥-ì specifiπ location. .cp 2èááThσ basiπ measuremen⌠ uni⌠ fielΣ i≤ defineΣ iε Tablσ 1┤-23« Target≤ shal∞ ì usσ inche≤ a≤ thσ defaul⌠ basiπ measuremen⌠ unit. .aw off .pm 0 .cp 15 Table 14-23: Basiπ Measuremen⌠ Units ============================================================================== Code Description ----¡---- ---------------------------------------------------------------- 00h Inch 01h Millimeter 02h Point 03Φ ¡ FFh Reserved ============================================================================== .aw on .pm 3 ááThσ measuremen⌠ uni⌠ diviso≥ specifie≤ thσ numbe≥ oµ unit≤ needeΣ t∩ equa∞ ì onσ basiπ measuremen⌠ unit« Target≤ shal∞ usσ 120░ a≤ thσ defaul⌠ measuremen⌠ ì uni⌠ divisor« Iµ ß valuσ oµ zer∩ i≤ specifieΣ thσ targe⌠ shal∞ returε CHEC╦ ì CONDITIO╬ statu≤ anΣ se⌠ thσ sensσ ke∙ t∩ ILLEGA╠ REQUEST. .pm 0 .lm 3 ááIMPLEMENTOR╙ NOTE║ ┴ targe⌠ whicΦ doe≤ no⌠ implemen⌠ thi≤ pagσ o≥ onl∙ ì áásupport≤ defaul⌠ value≤ use≤ onσ twelvσ-hundredth≤ (1/1200⌐ oµ aε incΦ a≤ ì ááthσ uni⌠ oµ measure. .pm 3 .lm 1 .cp 10 .aw off .pm 0 14.4. Glossar∙ fo≥ Scanne≥ Devices .aw on basσ elemen⌠ line.é ┴ °-axi≤ displacemen⌠ equa∞ t∩ zero. basσ line.é ┴ ∙-axi≤ displacemen⌠ equa∞ t∩ zero. beginninτ-oµ-medium.é ┴ °-axi≤ anΣ ∙-axi≤ oµ zer∩ displacement« Alternativel∙ ì thi≤ i≤ beinτ positioneΣ a⌠ thσ intersectioε oµ thσ basσ anΣ scaε lines. enΣ-oµ-medium.é Thσ maximuφ °-axi≤ anΣ ∙-axi≤ displacement. image.é Thσ digita∞ resul⌠ oµ ß scan. object.é Thσ origina∞ o≥ iteφ beinτ scanned. pixel.é Picturσ-element¼ i≤ thσ smalles⌠ phot∩ sigh⌠ iε thσ array. platen.é Thσ surfacσ iε whicΦ thσ targe⌠ i≤ positioned. scan.é Aε operatioε tha⌠ generate≤ ß digita∞ imagσ froφ thσ reflecteΣ ligh⌠ oµ ì aε object. scaε line.é ┴ ∙-axi≤ displacemen⌠ froφ thσ basσ line. scanninτ range.é Thσ tota∞ areß tha⌠ ß scanne≥ caε generatσ aε imagσ from« ì Fo≥ tw∩ dimensiona∞ object≤ thi≤ ma∙ corresponΣ t∩ thσ larges⌠ objec⌠ tha⌠ caε ì bσ scanned. window.é Al∞ o≥ par⌠ oµ thσ scanninτ rangσ oµ ß scanner« ┴ windo≈ define≤ thσ ì par⌠ oµ thσ objec⌠ scanned.è..end of section