Alinco DR-620, Service Manual

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Terminal Function of Main CPU
No. Pin Name Function I/O Logic
up
Description
1 P94/DA1
TONE O D/A CTCSS tone output/DCS output
2 P93/DA0
APC O D/A Power output control
3 P92
DATA O Pulse Serial data output for PLL IC
4 P91
STB O Pulse Strobe for PLL IC
5 P90
CLK O Pulse Seriai clock output for PLL IC
6 BYTE
BYTE I GND
7 CNVss
CNVss I H Witer control
8 P87
-
O
-
9 P86
-
O
-
10 RESET
RESET I L Reset input
11 Xout
XOUT O Main clock output
12 Vss VSS
-
GND
13 Xin
XIN
I
Main clock input
14 Vcc
VCC - CPU power terminal
15 P85
NMI I Activ high Interruption
16 P84
BU I L Backup signal detection input
17 P83
SEC I
Activ high
Aleam(SCR) sinal input
18 P82
PSW I L Power switch input
19 P81
CLKS O
Activ high
CPU clock-shift output
20 P80
MVRC O Pluse Main volume control
21 P77
LAMP I L
up
Lighting color selection (H:2color)
22 P76
SVRC O Pulse Sub volume control
23 P75
-
O
24 P74
TUV O Pulse 144MHz Tuning-voltage control
25 P73
-
O
26 P72
TUU O Pulse 430MHz Tuning-voltage control
27 P71
RXD2 I Pulse Serial Communication port for Clone
28 P70
TXD2 O Pulse Serial Communication port for Clone
29 P67
TXD1 O Pulse Serial Communication port for TNC
30 P66
RXD1 I Pulse Serial Communication port for TNC
31 P65
SCLK O Pulse Witer control
32 P64
BUSY O Pulse Witer control
33 P63
TXD O Pulse Serial Communication port for Front CPU
34 P62
RXD I Pulse Serial Communication port for Front CPU
35 P61
SCL O Pulse Serial clock output for EEPROM
36 P60
SDA I/O Pulse Serial dara output for EEPROM
37 P57
DUD
I Activ low up Digital unit detect
38 P56
SCR I Activ low up Ready sigunal for digital unit
39 P55
EPM I Activ low up Witer control
40 P54
PTTM I Activ low up PTT input for TNC
41 P53
T5 O Activ low TX power output ON/OFF
42 P52
SQC O Activ low Squelch control for TNC
43 P51
STBD O Pulse Strobe for Digital unit
44 P50
DSQ I Activ high Squelch signal input for Digital unit
45 P47
TNCB O
Activ high
Power switch ON/OFF for TNC
46 P46
VVCS O
Activ high
VHF Main VCO ON/OFF
47 P45
UVCS O
Activ high
UHF Main VCO ON/OFF
48 P44
DCSW O Activ high DCS switch
49 P43
C/S O Activ low Digital/TNC mode ON/OFF
50 P42
VAD O Activ high VHF digital ON/OFF
51 P41
UAD O
Activ high
UHF digital ON/OFF
52 P40
M/S O Activ high MAIN/SUB band select
53 P37
WIDE O Activ low Wide mode select
54 P36
NAR O Activ low Narrow mode select
55 P35
MUTV O Activ low VHF AF mute signal output
56 P34
MUTU O Activ low VHF AF mute signal output
18