4 - 4
4-5 PORT ALLOCATIONS
4-5-1 CPU (MAIN UNIT; IC9)
Pin
number
1
11
12
13
14
15
16
17
18
19
20
21
23
24
25
77
78
79
80
81
Port
name
BATT
RM
SRM
SMM
MM
AFON
OPST
DST
PLST
SCK
UNLK
SO
OPTIN
MONI
16CH
LIGHT
BEEP
4VC
R4C
T4C
Description
Input port for the low battely detection.
Outputs the AF mute swtich control
signal when the voice scrambler is
OFF.
Low : While squelched.
Outputs the AF mute switch control
signal when the voice scrambler is
ON.
Low : While squelched.
Outputs the MIC mute switch control
signal when the voice scrambler is
ON.
Low : While muted.
Outputs the MIC mute switch control
signal when the voice scrambler is
OFF.
Low : While muted.
Outputs control signal for the AF
amplifier regulator circuit.
High : Activates the AF amplifier cir-
cuit (MAIN unit; Q2).
Outputs strobe signals to the optional
voice scrambler unit
Outputs strobe signals to the D/A con-
verter IC (RF unit; IC2, pin 2).
Outputs strobe signals to the PLL IC
(RF unit; IC1, pin 3).
Outputs serial clock.
Input port for unlock signal.
High : PLL is unlocked.
Low : PLL is locked.
Outputs serial data.
Input port for the optinal voice scram-
bler unit connection.
Low : The optional voice scrambler
unit is connected.
Input port for the [MONI] switch.
Low : While [MONI] switch is
pushed.
Input port for the [16/9] switch.
Low : While [16/9] switch is pushed.
Outputs back light control signal.
High : Light ON.
Outputs beep audio signals.
Outputs 4V regulator control signal.
Outputs R4 regulator control signals.
Low : While receiving.
Outputs T4 regulator control signals.
Low : While transmitting.
Pin
number
82
83
85
86
87
88
90
91
92
93
94
95
96
97
98
99
100
Port
name
S4C
SPSEL
ESDA
CLIN
CLOUT
PTT
MKEY
SWA
SWB
LVIN
TEMPS
SQLV
TXDET
TONE
SD
NOIS
BTYPE
Description
Outputs S4 regulator control signals.
Outputs speaker select signal
Low : The internal speaker is
selected.
Input port for EEPROM serial data.
Outputs serial data to the EEPROM.
Input port for the cloning signal.
Outputs the cloning signal.
Input port for the [PTT] switch.
High : While [PTT] switch is pushed.
Input port for [MIC/SP] connector
detection.
Input port for the [CH/WX], [UP],
[DOWN] switches.
Input port for the [H/L], [DW], [SCN]
switches.
Input port for the PLL lock voltage
detection.
Input port for the transceiver’s internal
temperature detection.
Input port to adjust the squelch level.
Input port for the TX power detection.
Input port for the WX tone detection.
Input port fot the receive signal
strength detection.
Input port for noise signals (pulse-
type) for squelch operation.
Input port for the battely’s type detec-
tion.
4-5-2 D/A converter IC (RF UNIT; IC2)
Pin
number
5
6
11, 12, 13
14
Port
name
FRQCON
POWCON
T1–T3
T4
MODCON
Description
Output signal to adjust the reference
frequency.
Output signal to adjust TX power.
Output tunable bandpass filter control
signals.
Output tunable bandpass filter control
signals while receiving.
Output signal to adjust modulation
while transmitting.
