home *** CD-ROM | disk | FTP | other *** search
/ QRZ! Ham Radio 14 / QRZ Ham Radio Callsign Database - Volume 14.iso / modfiles / bc200xlt.txt < prev    next >
Text File  |  1999-10-09  |  4KB  |  76 lines
  1. Newsgroups: alt.radio.scanner
  2. From: brett@surfpix.princeton.edu (Brett Borowski)
  3. Subject: BC200xlt CPU pinouts!
  4. Message-ID: <1992Dec17.222525.11836@Princeton.EDU>
  5. Originator: news@nimaster
  6. Sender: news@Princeton.EDU (USENET News System)
  7. Nntp-Posting-Host: surfpix.princeton.edu
  8. Organization: Princeton University
  9. Date: Thu, 17 Dec 1992 22:25:25 GMT
  10. Lines: 63
  11.  
  12. Pinouts for the UC1147 CPU in the Uniden BC200xlt scanner....
  13.  
  14. Note:  ! means "not,"  If a pin does not have a designation, its destination
  15. is given.  Ex.  "Gnd" means the pin is designated "Gnd" but "to Gnd" means
  16. the pins was unlabeled but connected to ground.  This info comes from my
  17. reading the schematic from the service manual--sorry for any errors!
  18.  
  19. Pin                                     Pin
  20. 1       CL1 (Keypad)                    33      !CS1
  21. 2       CL3 (Keypad)                    34      !CS2
  22. 3       CL4 (Keypad)                    35      to Gnd
  23. 4       CL5 (Keypad)                    36      to Gnd
  24. 5       CL6 (Keypad)                    37      to Gnd
  25. 6       to VCC                          38      to Gnd
  26. 7       to VCC                          39      to Gnd
  27. 8       RW1 (Keypad)                    40      to Gnd
  28. 9       RW2 (Keypad)                    41      !SKIP (to Gnd via R(10k)
  29. 10      RW3 (Keypad)                    42      to Gnd
  30. 11      RW4 (Keypad)                    43      RESET
  31. 12      to VCC                          44      !TEST
  32. 13      to Gnd                          45      OSC1
  33. 14      to Gnd                          46      OSC2
  34. 15      to Gnd via R(unknown)           47      GND
  35. 16      !HLT                            48      !BL
  36. 17      to Gnd                          49      SC
  37. 18      to Gnd via R(unknown)           50      !800
  38. 19      to Gnd via R(unknown)           51      !UHF (assumed)
  39. 20      to Gnd                          52      AIR
  40. 21      !BUSY                           53      VHI
  41. 22      !RST                            54      VLO
  42. 23      !C/D                            55      n/c
  43. 24      !CS                             56      SHIFT
  44. 25      VLC3                            57      n/c
  45. 26      VCC                             58      MUTE
  46. 27      !SCK                            59      !P/OFF
  47. 28      SI                              60      to VCC
  48. 29      SC                              61      to VCC
  49. 30      PLLEN                           62      to VCC
  50. 31      !EN1                            63      LIGHT
  51. 32      !EN2                            64      CL2 (assumed) (keypad)
  52.  
  53. R(unknown) values were not listed on the schematic or in the parts list.
  54. (assumed) labels are based on the implications of other labels on the
  55. schematic.
  56.  
  57. 15, 18, and 19 look like they could be interesting....
  58. And 41 should be interesting to people who don't want their scanner to
  59. "skip" certain frequency ranges....
  60.  
  61. OSC1 and OSC2 are the feed in for the 400mhz oscillator.  This oscillator
  62. can be replaced with a faster one to increase the scan/search speed...but
  63. it will also decrease your light on-time...  And as far as keeping the
  64. light on all the time...one could connect a switch to the LIGHT pin and
  65. a VCC.  When off, it would function as normal.  When on, the light would
  66. go on and off with the power.  Watch out for short circuits if you do
  67. this...I fried a transistor on mine when I had a VCC to Gnd short....
  68.  
  69. Happy hacking!
  70. Brett
  71. --
  72. brett@surfpix.princeton.edu
  73.  
  74. Copied from the QRZ! Windows Ham Radio CDROM
  75.  
  76.