Kenwood TH-77A Service Manual page 24

IA-/7A/E
SEMICONDUCTOR DATA
Microcomputer 75116GF-674-3BE (Control Unit IC10): M, X, T, E
75116GF-675-3BE (Control Unit IC10): K, P
@Pin Functions
Description
Serial interface busy output
Serial interface transmission request output
Encoder clock
+
Encoder clock
Transmission power supply *L": On
Main band or sub-band selection
Reset input
Crystal oscillator input
Crystal oscillator input
DTMF decoder input selection
CTCSS tone detection
VHF UNLOCK input
UHF UNLOCK input
VHF PLL enable
UHF PLL enable
Data
Clock
Clock
Clock
Clock
P80 AF output selection
P93 AF output-selection
P92 ; AF output selection
P91 AF output selection
P90 DTMF decoder data input
INT3 P13 DTMF decoder tone detection (STD)
INT2 P12 Encoder data
INT1 P11 Encoder clock
INTO P10 Power switch
Remote contro! analog input
L Battery analog input
Signal strength meter UHF analog input
Signal strength meter VHF analog input
UHF squelch input
T11 VHF squelch input
P23 DTMF data enable
PCL P22 DTMF power switch "L": Active
PTO1 P21 TSU-7 data enable
PTOO P20 Beep sound and 1750 Hz tone output
SI P03 Serial interface serial input
SO P02 Serial interface serial output
SCK P01 Serial interface clock
INT4 POO Power detection "H": On; "L": Off
5M power supply "L": On
AF power supply "L": On
VHF transmission "L": On
UHF transmission "L*: On
Transmission power supply "L": On
Save "H": On
24