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From: Brett Borowski Subject: The Pin Outs For The UC1147 CPU in The Uniden BC200XLT Scanner Organization: Princeton University Date: Thu, 17 Dec 1992 The Pin outs 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. Ground means the pin is designated Ground but to Ground 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. PINOUTS UC1147 CPU: 01 CL1 (Keypad) 33 !CS1 02 CL3 (Keypad) 34 !CS2 03 CL4 (Keypad) 35 to Ground 04 CL5 (Keypad) 36 to Ground 05 CL6 (Keypad) 37 to Ground 06 to VCC 38 to Ground 07 to VCC 39 to Ground 08 RW1 (Keypad) 40 to Ground 09 RW2 (Keypad) 41 !SKIP (to Ground via R(10k) 10 RW3 (Keypad) 42 to Ground 11 RW4 (Keypad) 43 RESET 12 to VCC 44 !TEST 13 to Ground 45 OSC1 14 to Ground 46 OSC2 15 to Ground via R(unknown) 47 Ground 16 !HLT 48 !BL 17 to Ground 49 SC 18 to Ground via R(unknown) 50 !800 19 to Ground via R(unknown) 51 !UHF (assumed) 20 to Ground 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 Ground short. Happy Hacking Brett Borowski |
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