Icom IC-R5 Service Manual page 13

CPU (Continued)
Pin Port
number name
Outputs LCD back light control signal.
69 LIGHT
High: Lights ON.
Input port for the clock signal from the
73 DCK
[DIAL].
Input port for the up, down signals
74 DUD
from the [DIAL].
Input port for the [SQL] swtich.
75 SQL
Low: [SQL] swtich is pushed.
Input port for the [FUNC] swtich.
76 FUNC
Low: [FUNC] switch is pushed.
Input port for the [MODE] switch.
77 MODE
Low: [MODE] switch is pushed.
RXF1,
80–85 RXF0, Input port for the band matrix.
B3–B0
88–90, SEC37–35,
92, SEG34, Outputs LCD segment data.
94–96 SEC33–31
97 CONT1 Outputs LCD contrast control signal.
98 CONT0
99–127 SEG28–0 Outputs LCD segment data.
Outputs audio volume level control
138 VRC
signal.
139 FSET Outputs frequency control signal.
• Outputs vari-cap tuning control sig-
nal.
141 TRAC
• Outputs bar antenna tuning control
signal.
Description
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