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4-5 PORT ALLOCATIONS
4-5-1 CPU (LOGIC unit; IC1)
Pin
number
Port
name
Description
1
PCON
Outputs control signal for the 5 V
regulator (IC16, Q4, Q6, Q7, D10).
2
VORS
Input port for the 30 Hz phase signal.
3
VORC
Input port for the VOR 30 Hz standard
signal.
4
BPCPI
Outputs the bias control signal for a
type of battery.
5
LIGHT
Input port for [LIGHT] switch.
6
CLIN
Input port for the cloning signal.
7
CLOUT
Outputs the cloning signal.
10
EDATA
I/O port for data signal from/to the
EEPROM (LOGIC unit; IC7)
11
ECK
Outputs clock signal to the EEPROM
IC (LOGIC unit; IC7).
12
POWER Input port for [POWER] switch.
13
PTT
Input port for [PTT] switch.
High:
W h i l e [ P T T ] s w i t c h i s
pushed.
14
UNLK
Input port for the PLL unlock signal.
Low:
PLL is unlocked.
17
DCC
Input port for the external DC connec-
tion detection.
25
RESET
Input port for the CPU reset signal.
28
VORD
Input port for the VOR signal detec-
tion.
29
RSSI
Input port for the receive signal level.
30
RFDETV
Input port for the power detection of
power amplifi er (RF unit; Q2).
31
THRMC
Input port for the transceiver's internal
temperature.
32
SBATT
Input port for the battery type detec-
tion.
34
VIN
Input port for the battery voltage de-
tection.
38
BEEP
Outputs BEEP audio signals.
109
PSTB
Outputs strobe signal to the PLL IC
(RF unit; IC3).
110
PDATA
Outputs data signals to the PLL IC (RF
unit; IC3).
111
PCK
Outputs clock signal to the PLL IC (RF
unit; IC3).
112
TXC
Outputs control signal to the T5 regu-
lator circuit (Q7, Q8, D8).
115
JACKDET
Input port for external SP jack con-
nection detection.
High:
While external SP jack is
connected.
119, 120
DICK,
DIUD
Input ports for [DIAL].
4-5-2 EXPANDER (RF unit; IC5)
Pin
number
Port
name
Description
4
AFC
Outputs control signal to the AF out
controller (Q35, Q36) for AF amplifi er
(IC6).
5
ALCC
Outputs control signal to the ALC con-
troller (Q52).
6
R5C
Outputs control signal to the R5V
regulator (Q20).
7
ANLC
Outputs control signal to the ANL
switch (Q21).
11
MMUT
Outputs control signal for MIC mute
switch (Q51).
12
DET-
MUT
Outputs detector mute signal to the
AM/FM switch (IC2, pin 2).
13
SHIFT
Outputs shift control signal to the
VCO switch (Q57).
14
WXC
Outputs AM/FM (WX ch) select signal
to the AM/FM switch (IC2, pin 5).
4-5-3 EXPANDER (RF unit; IC17)
Pin
number
Port
name
Description
2, 3,
10, 11
T1–T4
Outputs the bandpass filter tuning
control signal.
14
MOD70
Outputs modulation control signal to
the buffer-amplifi er (IC18).
15
MOD30
Outputs modulation control signal to
the ALC amplifi er (IC19).
23
VOL
Outputs AF volume control signal to
the AF amplifi er (IC6).
