TK-360G/(N)/370G/(N)
22
CIRCUIT DESCRIPTION/SEMICONDUCTOR DATA
Fig. 10 Control system
8. CONTROL SYSTEM
Keys and channel selector circuit.
The signal from keys and channel selector input to
microprocessor directly as shown in fig. 10.
Channel selector
IC13
CPU
CN501
CN1
TK-370G
TK-360G
EN1
87
3
25
EN3
EN2
KOUT0
KOUT1
KOUT2
KOUT3
KIN0
KIN1
KIN2
KIN3
KIN4
16
27
KEYAD
PTT
MONI
SW
LAMP
SW
PTT
SW
1
2
3
A
4
5
6
B
7
8
9
C
∗
0
#
D
5M
47k
47k
100k
SEMICONDUCTOR DATA
LCD Driver : LC75823W (Display UNIT IC501)
(TK-370G only)
■
Block diagram
LATCH & DRIVER
SHIFT REGISTER
COMMON
DRIVER
ADDRESS
DETECTOR
CLOCK
GENERATOR
V
DD
CE
CL
DI
V
SS
OSC
INH
V
DD
2
V
DD
1
COM1 COM2 COM3
S52 S51
S1
Pin No.
Name
I/O
Active
Function
1-52 S1-S52
O
-
Segment output for displaying data
transferred form serial data.
53-55 COM1-COM4
O
-
Common drive output.
Frame frequency fo=(fosc/384)Hz
56
VDD
-
-
The display to turn off
57
INH
I
L
INT=L : Turn off
INT=H : Turn on
Apply 2/3 the LCD drive bias voltage
58
VDD1
I
-
form outside. If 1/2 the bias is applied,
connect to VDD2.
Apply 1/3 the LCD drive bias voltage
59
VDD2
I
-
form outside. If 1/2 the bias is applied,
connect to VDD1.
60
VSS
-
-
61
OSC
I/O
-
Oscillation terminal
62
CE
I
H
Chip enable. Serial data transfer terminal.
Connected to the microprocessor.
63
CL
I
Synchronizing clock. Serial data transfer terminal.
Connected to the microprocessor.
64
DI
I
-
Trnsfer data. Serial data transfer terminal.
Connected to the microprocessor.
■
Pin function