User Manual

TR-800 Service Manual
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 MPU Pins
Repeater front panel
(MPU Model: uPD780114, CRYSTAL: 9.8304MHz）
PIN No. PIN NAME I/O DESCRIPTION
1 AVref I Connect VDD
2 AVss I To GND
3 IC(VPP) I To GND (programming pin) short-circuit resistor added
4 VDD I +5V
5 Vss I GND
6 X1 I Clock Input
7 X2 O Clock output
8
RESET I Knockdown
9 XT1 I NC Connect VDD
10 XT2 I NC Open
11 SHIFT O Clock Frequency Shift Active: H
12 PTT/O O Main radio PTT signal output control Active: L
13 RxD2 I Analog serial data input (slave MPU communication)
14 TxD2 O Analog serial data output (slave MPU communication)
15 RSW0(DN) I Encoder knob [DOWN] button input High/low level
16 RSW1(UP) I Encoder knob [UP] button input Rising Edge / Falling Edge
active
17 LCDBL/LED0 O LCD backlight control/LED0 Active: H
18 LCDCS/LED1 O LCD chip selection output/LED1
19 LCDSOD/LED2 I/O LCD data reading/LED2 (LCD/LED I/O)
20 LCDDAT/LED3 O LCD data output/LED3
21 LCDCLK/LED4 O LCD clock output/LED4
22 EVss I GND
23 E VDD I Connect VDD (programming pin)
24 AFTest O Audio test control
25 SpkSW O Main/slave speaker output control
H: Main unit outputs L: slave radio outputs
26 RXD1 I Serial data input (main MPU communication)
27 TXD1 O Serial data output (main MPU communication)
28 SETUP/O O Repeater setup output Active: H
29 HOOK/RXD0 I Palm microphone HOOK input/serial data input Active: L
30 TXD0 O Serial data output PTT active: L
31 RLED O Red LED Active: H
32 GLED O Green LED Active: H
33 PTT I Palm microphone PTT key input PTT Active: L
34 OPT/O O OPT signal output Active: H