TR-800 Service Manual
43
MPU and ACC. Connector Pins
Front Panel of Repeater
(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(V
PP)
I
To GND (programming pin) adding short-circuit resistor
4 V
DD
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
INT
I
Interrupt input for alarm and channel steering functions
13
RxD2
I
Analog serial data input (slave MPU communication)
14
TxD2
O
Analog serial data output (slave MPU communication)
15
RSW0(DN)
I
Down button input High/low level
16
RSW1(UP)
I
Up button input Rising Edge/Falling Edge
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
V
DD
I
Connect VDD (programming pin)
24 AFTest O
Audio
test
control
25 SpkSW O
Master/slave
speaker output control
H: Master unit outputs L: slave radio outputs
26
RXD1
I
Serial data input (master MPU communication)
27
TXD1
O
Serial data output (master 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 SDA I/O
I
2
C-Compatible Serial-Data I/O
32 SCL O
I2C-Compatible Serial-Clock Output
33
PTT
I
Palm microphone PTT key input PTT Active: L
34
OPT/O
O
OPT signal output Active: H
35
RPT/O
O
RPT signal output Active: H
Содержание TR-800
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