Main Cpu Port Allocations - Icom IC-7700 Service Manual

3-4 MAIN CPU (IC604) PORT ALLOCATIONS
Pin
No.
Clock signal to 4094/LMX2306 (PLL UNIT).
42
(DDS for 1st LO PLL-IC/DDS, 2nd TX LO DDS, 3rd TX LO)
"Serial data to 4094/LMX2306 (PLL UNIT).
43
(DDS for 1st LO PLL-IC/DDS, 2nd TX LO DDS, 3rd TX LO)
44 N/C
45 Mode status (1Lo or T2Lo) output.
46 Chip select siganl to PLL.
47 Strobe to the PLL.
51 Clock signal to units other than PLL and SCOPE.
52 Serial data (other than PLL, SCOPE and DSP).
53 N/C
54 CI-V format data (UART).
55 CI-V format data (UART).
56 Clock to the DSP IC.
57 Seral data (TXD/RXD) to the DSP.
58 START signal to the TUNER UNIT (UART, 9600).
142 Serial data to the DAC (BU9480) for ext. S-meter.
140 Clock (A-clock) to the DAC (BU9480) for ext. S-meter.
138 Clock (B-clock) to the DAC (BU9480) for ext. S-meter.
137 Power line for liner circuit control signal.
113 Forword wave detected voltage (A/D).
114 Refl ected wave detected voltage (A/D).
115 ALC fedback voltage (A/D).
116 Drain current (fi nal amp.).
117 Drain voltage (fi nal amp.).
118 PA UNIT temparature.
119 Cooling fan motor current.
120 Voltage from key pad (rear panel).
133 Serial data to the FRONT CPU (UART, 38400).
134 Serial data from the FRONT CPU (UART, 38400).
135 CW/RTTY keying signal to the DSP.
81 Mute control signal.
82 TX power line control signal.
83 Noise pulse.
105 RX power line control signal.
3 Serial communication with the scope DDS (AD9857) detect signal.
33 Serial data to the SCOPE UNIT DDS/PLL/DSP.
34 Strobe to the scope PLL (LMX2306).
59 Chip selet signal to the scope DDS (AD9857).
60 Profi le (0/1) select signal to the scope DDS (AD9857).
61 Clock signal to the DDS/PLL/DSP.
121 DSP data (TXD/RXD).
122 Hand shake signal from SCOPE DSP.
123 Extra port for SCOPE DSP.
124 Serial data from SCOPE DSP.
125 N/C
126 Through signal from the TUNER UNIT.
127 Key input from the tUNER UNIT.
128 Straight key input (A/D).
Description
3 - 5
IN/
Condtion
OUT
O
O
O
O
I/O
O
O
O
O
O
I
O
O
O
O
O
O
O "H"=Power ON
I
I
I
I
I
I
I
I
O
I
O "L"=Key pushed
I "H"=Mute
O "L"=TX
I
O "L"=RX
O "H"=detected
O
O
O "L"=AD9875 is slected
O "H"=Profi le 1 is selected.
O
I
I
I
I
I
I "H"=Through
I "H"=Tuner ON
I "L"=Key pushed