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Pin
number
90
92
93
94
97
Port
name
ECK
ASEN
TEMP
NSEN
RFML
Description
Outputs serial clock signal for the
EEPROM (IC3301, pin 6).
Input port for the SEND signal from
the accessory connector (J1801).
Input port for the power amplifier tem-
perature signal from the PA unit.
Input port for the SEND signal from
the AF/MOD connector (PLL unit;
J5051, pin 8) via the J3602.
Input port for the RF/ANTC meter’s
voltage from the meter amplifier
(IC1201, pin 14).
MAIN CPU (MAIN UNIT; IC3303)–continued
3-7-2 OUTPUT EXPANDER IC FOR THE PLL
STROBE (IC3601)
Pin
number
4
5
6
7
14
Port
name
PST1
PST2
PST3
PST4
PST5
Description
Outputs strobe signal for the DDS IC
(PLL unit; IC5101, pin 91).
Outputs strobe signal for the PLL IC
(PLL unit; IC5401, pins 13).
Outputs strobe signal for the DDS IC
(PLL unit; IC5701, pin 41).
Outputs strobe signal for the DDS IC
(PLL unit; IC5801, pin 41).
Outputs strobe signal for the DDS IC
(PLL unit; IC5901, pin 41).
3-7 PORT ALLOCATIONS
3-7-1 MAIN CPU (MAIN UNIT; IC3303)
Pin
number
1
2
3
4
6
7
11
19
23
24
26
27
28
29
30
32
33
34
37
38
47
48
49
79
80
89
Port
name
TXS
RXS
PSEL
BEEP
PDAT
PCK
UNLK
PWRS
DRES
STBO
RQO
RQI
DO
NMEI
NMEO
NMEI2
LSTB
DSTB
LCK
LDAT
MSTB
PSTB
SQLC
STAT
KEYS
EDT
Description
Outputs T8 regulator circuit (MAIN
unit; Q1501) control signal.
Outputs R8 regulator circuit (MAIN
unit; Q1502) control signal.
Outputs serial strobe signal to the
latch control IC (IC3601, pin 1).
Outputs beep audio signals.
Outputs serial data signal for the PLL
circuits.
Outputs serial clock signal for the PLL
circuit.
Input port for PLL unlock signal.
Outputs switching relay (PA unit;
RL6701) control signal.
Outputs the RESET signal.
Outputs strobe signal for the DSP unit.
Outputs data signal for the DSP unit.
Outputs serial data signal for the DSP
unit.
Input port for the serial data signal
from the DSP unit.
Input port for the NMEA signal.
Outputs NMEA signal for PLL unit.
Input port for the GPS signal from the
PLL unit.
Outputs serial strobe signal for the
IC3602, IC3603.
Outputs strobe signal for the D/A con-
verter IC (IC3606).
Outputs serial clock signal for
IC3602–IC3605, D/A converter IC
(IC3606) and DSP unit.
Outputs serial data signal for the
IC3602, IC3603 and D/A converter IC
(IC3606).
Outputs serial strobe signal for the
IC3603, IC3605.
Outputs PLL strobe control signal for
the LATCH controller (IC3601).
Outputs squelch control signal for the
SQL switching IC (IC1701).
Outputs the optional antenna tuner
start control signal for the PA unit via
the J1901.
Input port for the optional antenna
tuner key control signal via the PA
unit.
I/O port for the serial data signals
from/to the EEPROM (IC3301, pin 5).
3-7-3 OUTPUT EXPANDER IC FOR THE FILTER
UNIT (IC3602)
Pin
number
4
5
6
7
11
12
13
14
Port
name
L0S
L1S
L2S
L3S
L7S
L6S
L5S
L4S
Description
Outputs 0.5–1.999999 MHz low-pass
filter control signal.
Outputs 2–2.999999 MHz low-pass fil-
ter control signal.
Outputs 3–4.999999 MHz low-pass fil-
ter control singnal.
Outputs 5–6.999999 MHz low-pass fil-
ter control signal.
Outputs 20–30 MHz low-pass filter
control signal.
Outputs 14–19.999999 MHz low-pass
filter control signal.
Outputs 10–13.999999 MHz low-pass
filter control signal.
Outputs 7–9.999999 MHz low-pass fil-
ter control signal.