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Pin
number
7
10
11
16
29
31
33
34
36
37
38
58
59
61
62
Port
name
RES
OSC2
OSC1
APWR
RMUTE_C
PTTOUT_C
ATXD
ACLK
ASTB
ARXD
ARES
PSAVE
BUSY
PTTIN
Description
Input port for the reset signal from the
reset IC (IC203, pin 1).
Low :The CPU is reset.
Outputs 9.8304 MHz reference signal.
Input port for 9.8304 MHz reference
signal.
Outputs 3.2V regulator circuit (IC2,
pin 3) control signal.
Outputs receive AF mute control signal
to the connected transceiver via the
J301 (pin 24).
High :While muting.
Outputs PTT signal to the connected
transceiver via the J301 (pin 2).
High :While transmitting.
Outputs transmit data signal to the
CPU (IC151, pin 32).
Outputs clock signal to the CPU
(IC151, pins 28 and 34).
Outputs strobe signal to the CPU
(IC151, pins 30 and 38).
Input port for receive data signal from
the CPU (IC151, pin 42).
Outputs reset signal to the linear
CODEC IC (IC50, pin 13).
Output power save control signal to
the +3V controller circuit (Q400 and
Q401).
Low :Power save is ON.
Input port for the BUSY signal from the
connected transceiver via the J301
(pin 6).
High :While receiving signals.
Input port for the PTT signal from the
connected transceiver via the J301
(pin 1).
High :While transmitting.
4-8-2 CPU (IC2)