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