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3 - 5
Pin
No.
Line
name
De
s
cription
I/O
1
EC
[EC] key. (pulled up)
I
2
DIAL
[DIAL] key. (pulled up)
I
3
BEEP
Beep audio.
O
4
MONI
[VOL] switch. (push)
I
7
PTT1_0
External [PTT1/2] keys.
I
15
RESET
Reset signal from the reset IC (F: IC3).
I
19
REG_C2
Regulator control signal to the +16V
regulator (M: IC75).
"Low"=ON
O
24
INCOM_0
External intercom switch (pulled up).
I
25
SFT
Clock frequency shift signal to system
clock oscillator (F: Q6).
O
34–
37
V3–V0
Power supply for EL display (F: DS11).
O
40
SCK
Serial clock to the EEPROM (F:IC5).
O
43
SDN1
Phase-A signal from rotary encoder (S1;
innner).
I
44
SUP1
Phase-B signal from rotary encoder (S1;
innner).
I
45
SDN2
Phase-A signal from rotary encoder (S1;
outer).
I
46
SUP2
Phase-B signal from rotary encoder (S1;
outer).
I
52
DATA_IC11 Serial data to the LED driver (F: IC15).
O
53
CLK_IC12
Serial clock to the LED driver (F: IC15).
O
54–
56
A–C
I/O setting signals to the logic IC (M: IC49).
O
57
CDC
Common serial clock/data output to MAIN
UNIT control siganal.
O
67–
82
D0–D15
EL display driver (F: IC6, IC7) control data
bus.
I/O
88
REM_0
External [REMOTE] key. (pulled up)
I
89
RSSI
RSSI signal from the FM IF IC (M: IC39).
I
90
NOISE
Noise signal from the FM IF IC (M: IC39).
I
91
VOX1
VOX (pilot side) signal from the VOX
detector (M: IC3, D16).
I
92
VOX2
VOX (co-pilot side) signal from the VOX
detector (M: IC3, D17).
I
93
VR
Volume level from the VR (VR UNIT; R1).
I
94
PHOTO
Luminescence level from light sensor (F:
IC9, D2).
I
95
UL
Unlock signal from PLL IC (M: IC47).
"Low"=PLL unlocked.
I
96
SWAP
[ ] key. (pulled up)
I
97
RCL
[RCL] key. (pulled up)
I
98
MEM
[MEM] key. (pulled up)
I
99
DUAL
[DUAL] key. (pulled -up)
I
Pin
No.
Line
name
De
s
cription
8
SEND
TX voltage line control signal to the 8T2 switch
(M: Q32).
"Low"=While transmitting.
9
VCO1
TX VCO control signal to the VCO switch (M: Q2).
"High"=TX VCO is selected.
10
VCO2
RX VCO control signal to the VCO switch (M: Q3).
"High"=RX VCO is selected.
11
AM/FM
RX mode toggling signal to the AM/FM switch
(M: Q48).
"Low"=AM mode is selected.
12
FIL1
1st IF fi lter (M: FI3, BW=20 kHz) select signal.
"Low"=FI3 (BW=20 kHz) is selected.
13
FIL2
1st IF fi lter (M: FI4, BW=9 kHz) select signal.
"Low"=FI4 (BW=9 kHz) is selected.
14
MM
AF mute signal to the MUTE SW (M: Q58,
Q59).
"High"=AF line is muted.
16
ANL
ANL circuit control signal to the ANL switch (M: IC70).
"Low"=ANL function is activated.
3-5 PORT ALLOCATIONS
• CPU (F: IC4)
• EXPANDER (M: IC48)