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QRZ! Ham Radio 13
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QRZ Ham Radio Callsign Database - Volume 13.iso
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bc200xlt.txt
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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
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