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)........................................... !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