Icom IC-7800 - Page 369

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3-7-31 CPLD IC (LOGIC UNIT; IC52)
60, 61
63–68,
IMS0–IMS8 Output the matrix/strobe signals.
70
71 IMR0 Input port for the matrix return signal.
72 IMRE0
Outputs permit signal to read the
matrix return signal.
74 IMR1 Input port for the matrix return signal.
76 IMRE1
Outputs permit signal to read the
matrix return signal.
77 FR_STS
Input port for the writing status signal
to the flash ROM (MEMORY board;
IC2, pin 5).
78
FR_VPEN
Outputs permit signal to write data to
the flash ROM (MEMORY board; IC2,
pin 15).
92 DO_VS
Input port for the “VS” signal from the
GDC IC (IC203).
93 DO_HS
Input port for the “HS” signal from the
GDC IC (IC203).
94 EX_HS
Outputs “HS” signal for the external
monitor.
95 EX_VS
Outputs “VS” signal for the external
monitor.
Pin Port
Description
number name
3-7-32 EXPANDER IC (TENKEY BOARD; IC1)
6 MTXD
Outputs [TX] LED for main band con-
trol signal.
Low : While transmitting.
7 MRXD
Outputs [RX] LED fir main band con-
trol signal.
Low : While receiving a signal or
squelch is opened in main
band.
8MLCD
Outputs [DIAL LOCK] LED for main
dial control signal.
Low : [MAIN DIAL] is locked.
9 SPLD
Outputs [SPLIT] LED control signal.
Low : During spilt operation.
10 STXD
Outputs [TX] LED for sub band control
signal.
Low : While transmitting in split
operation.
11 SRXD
Outputs [RX] LED for sub band con-
trol signal.
Low : While receiving a signal or
squelch is opened in sub
band.
12 MLCD
Outputs [DIAL LOCK] LED for sub dial
control signal.
Low : [SUB DIAL] is locked.
TKYD1,
13–16
TKYD2, Output tenkey backlight control sig-
TKYD3, nals.
TKYD4
Pin Port
Description
number name
3-7-33 EXPANDER IC (TENKEY BOARD; IC2)
6 MPCD
Outputs [PBT CLEAR] LED for main
band control signal.
Low : While using the PBT function
in main band.
7 SPCD
Outputs [PBT CLEAR] LED for sub
band control signal.
Low : While using PBT function in
sub band.
8 MAPD
Outputs [APF/TPF] LED for main
band control signal.
Low : While using [APF/TPF] func-
tion in main band .
9 SAPD
Outputs [APF/TPF] LED for sub band
control signal.
Low : While using [APF/TPF] func-
tion in sub band .
12 MNCD
Outputs [NOTCH ON] LED for main
band control signal.
Low : While using [NOTCH] func-
tion in main band .
13 SNCD
Outputs [NOTCH ON] LED for sub
band control signal.
Low : While using [NOTCH] func-
tion in sub band .
14 SUBD
Outputs [SUB] LED control signal.
Low : While sub band access is
enabled.
15 MIND
Outputs [MAIN] LED control signal.
Low : While main band access is
enabled.
Pin Port
Description
number name