TH-K2AT/K2E/K2ET
12
■
Key and Encoder Input Circuit
The POWER key is assigned to the interrupt port (pin 95) of
the M PU.
The PTT key is assigned to the dedicated port (pins 13, 14)
of the M PU.
SET
CALL
#
0
∗
M ONI
M R
9
8
7
LAM P
VFO
6
5
4
M ENU
F
3
2
1
KIN0
KOUT0 KOUT1 KOUT2 KOUT3 PWRSW
95
S7
POWER
SW
J3
ROTARY
ENCODER
KIN1
KIN2
KIN3
KIN4
IC8
M PU
PTTI
14
PTTE
13
ENCB
36
ENCA
35
SET
M ONI
LAM P
M ENU
CALL
M R
VFO
F
KIN0
KOUT0 KOUT1 KOUT2 KOUT3
95
S7
J3
KIN1
KIN2
KIN3
KIN4
IC8
M PU
PTTI
14
PTTE
13
ENCB
36
ENCA
35
PWRSW
POWER
SW
ROTARY
ENCODER
Other keys composes a matrix and key presses are detected
by scanning them by softw are.
The encoder reads data using the interrupt port (pins 35
and 36) of the M PU.
16 key (K, K2, M , M 2 and E3 types)
Fig. 14 Key and Encoder input circuit
4 key (E type)
CIRCUIT DESCRIPTION
