TC-265/365 SERVICE MANUAL
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19
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CPU Pins
CPU control M38034M4
Pin No.
Port name
I/O
Function
1 TI I
CTCSS/CDCSS
input
2
BUSY
I
Input busy signal
3 BATT I
Detect
battery
voltage
4 NC I
NC
5 TO
O
Output
CTCSS/CDCSS
6 BEEP
O
Beep
output
7 NC I
NC
8 ENC0 I
Input
encode
9 ENC1 I
Input
encode
10 ENC2 I
Input
encode
11 ENC3 I
Input
encode
12
TSI
I
AF signaling decode input
13
PTT
I
[PTT] input, connect with RXD
14 TXD O
RS-232C
output
15 RXD I
RS-232C
input
16 MONI I
[MONI]
input
17
SELF
I
Self-Program L: set up model
18 CNVSS I
Connect
VSS
19 RST I
Reset
input
20 INT0 I
Power
detection
21 NC I
NC
22 XIN I
Oscillator
(7.3728MHz)
23 XOUT O
Oscillator
24 VSS I
Grounding
25
SHIFT
O
Clock frequency shift H: enable
26
PABC
O
MOS FET power H: enable
27
WNRC
O
Audio reference sensitivity L: narrow
28
WNTC
O
Max deviation control H: narrow
29 NC I
NC
30
SDA
I/O
EEPROM data cable
31
SCL
O
EEPROM clock cable
32
UL
I
PLL unlock detector L: unlock
33
DT
O
Common data output
34
CK
O
Common clock output
35
LE
O
PLL IC H: lock up
36
5MC
O
Power control except for CPU and EEPROM L: unlock
37
AFCO
O
AF amplifier H: unlock
38
RX
O
TX/RX VCO H: receive
39
GLED
O
Green LED control H: light
40
RLED
O
Red LED control H: light
41
SAVE
O
Battery save control H: battery save OFF
42
MUTE
O
mute control H: mic squelch L: AF squelch
43
5RC
O
Receiver power control L: unlock
44
5TC
O
Transmitter power control H: unlock
45 NC I
NC
46 NC I
NC
