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Pin Port
Description
number name
Pin Port
Description
number name
4-5 PORT ALLOCATIONS
4-5-1 CPU (LOGIC UNIT: IC7)
1
9
11
12
14
15
16
17
19
20
21
22
23
26
32–35
36–39
40
41
44
45
47
49–51
53
DETO
RESET
CSHIFT
SCK
SO
PTT
CLIN
CLOUT
NOIS
COLOR
DIM1
DIM0
REMO
UNLK
COM4–
COM1
KR3–
KR0
EXTMIC
OPV2
PLLSTB
PLLCK
EXSTB
OPV3
OPT1–
OPT3
DUSE
Input port for the weather alert signal
detection.
Input port for reset signal.
Outputs reference oscillator for the
CPU control signal.
Outputs serial clock signal to the
expander IC (MAIN unit; IC2, pin 3),
D/A convertor IC (MAIN unit, IC5, pin
7), etc.
Outputs serial signals to the D/A con-
vertor IC (MAIN unit; IC5, pin 8),etc.
Input port for the [PTT] switch.
High : While [PTT] switch is pushed.
Input port for the cloning signal.
Outputs the cloning signal.
Input port for noise signals (pulse
type).
Outputs LCD back light color control
signal.
Low : While choosing umber color.
Outputs LCD contrast control signal.
Input port for the remote signals from
a remote microphone (HM-133V) via
the [MIC] jack.
Input port for PLL unlock signal from
the PLL IC (MAIN unit; IC1, pin 14).
Outputs LCD common signals.
Input port for initial matrix.
Low : While keys are pushing.
Input port for the remote control micro-
phone (HM-133V) connecting detec-
tion.
Low : While HM-133V is connected.
Input port for the optional unit detec-
tion signal.
Outputs strobe signals to the PLL IC
(IC1, pin 4).
Outputs PLL IC (IC1, pin 2) clock sig-
nal.
• Outputs strobe signal to the
expander IC (IC2, pin 1).
• Input port for the optional unit detec-
tion signal.
I/O port for optional unit control signal.
Outputs low-pass filter cut-off frequen-
cy control signal when DTCS is acti-
vated.
54
55
56–88
90
91
95
96
97
98
99
100
Outputs EEPROM (LOGIC unit; IC5,
pin 6) clock signal.
I/O port for the data signals from/to the
EEPROM (LOGIC unit; IC5, pin 5).
Output LCD driver signals.
Outputs CTCSS and DTCS tone sig-
nal.
Outputs DTMF, BEEP and 1750 Hz
tone signal.
Input port for the squelch level detec-
tion.
Input port for the microphone up/down
signal while connecting the micro-
phone.
Input port for the RSSI detection.
Input port for the PLL lock voltage.
Input port for the power detector volt-
age.
Input port for the transceiver’s internal
tempareture detection.
ESCK
ESDA
SEG1–
SEG32
CTCC
TONE
SQLV
MICUD
SD
LVIN
PDET
TEMP