Icom IC-M802 Service Manual page 77

3-7 PORT ALLOCATIONS
3-7-1 MAIN CPU (MAIN UNIT; IC3303)
Pin Port
number name
Outputs T8 regulator circuit (MAIN
1 TXS
unit; Q1501) control signal.
Outputs R8 regulator circuit (MAIN
2 RXS
unit; Q1502) control signal.
Outputs serial strobe signal to the
3 PSEL
latch control IC (IC3601, pin 1).
4 BEEP Outputs beep audio signals.
Outputs serial data signal for the PLL
6 PDAT
circuits.
Outputs serial clock signal for the PLL
7 PCK
circuit.
11 UNLK Input port for PLL unlock signal.
Outputs switching relay (PA unit;
19 PWRS
RL6701) control signal.
23 DRES Outputs the RESET signal.
24 STBO Outputs strobe signal for the DSP unit.
26 RQO Outputs data signal for the DSP unit.
Outputs serial data signal for the DSP
27 RQI
unit.
Input port for the serial data signal
28 DO
from the DSP unit.
29 NMEI Input port for the NMEA signal.
30 NMEO Outputs NMEA signal for PLL unit.
Input port for the GPS signal from the
32 NMEI2
PLL unit.
Outputs serial strobe signal for the
33 LSTB
IC3602, IC3603.
Outputs strobe signal for the D/A con-
34 DSTB
verter IC (IC3606).
Outputs
37 LCK IC3602–IC3605, D/A converter IC
(IC3606) and DSP unit.
Outputs serial data signal for the
38 LDAT IC3602, IC3603 and D/A converter IC
(IC3606).
Outputs serial strobe signal for the
47 MSTB
IC3603, IC3605.
Outputs PLL strobe control signal for
48 PSTB
the LATCH controller (IC3601).
Outputs squelch control signal for the
49 SQLC
SQL switching IC (IC1701).
Outputs the optional antenna tuner
79 STAT start control signal for the PA unit via
the J1901.
Input port for the optional antenna
80 KEYS tuner key control signal via the PA
unit.
I/O port for the serial data signals
89 EDT
from/to the EEPROM (IC3301, pin 5).
Description
serial clock signal for
MAIN CPU (MAIN UNIT; IC3303)–continued
Pin Port
number name
90 ECK
92 ASEN
93 TEMP
94 NSEN
97 RFML
3-7-2 OUTPUT EXPANDER IC FOR THE PLL
STROBE (IC3601)
Pin Port
number name
4 PST1
5 PST2
6 PST3
7 PST4
14 PST5
3-7-3 OUTPUT EXPANDER IC FOR THE FILTER
UNIT (IC3602)
Pin Port
number name
4 L0S
5 L1S
6 L2S
7 L3S
11 L7S
12 L6S
13 L5S
14 L4S
3 - 9
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).
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).
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.