JVC KD-MX2900R, Service Manual

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1 ~ 16
48 ~ 33
32
~
17
49
~
64
COMMON
DRIVER
CLOCK
GENERATOR
CCB
INTERFACE
VDET
KEY SCAN
KEY BUFFER
CONTROL
REGISTER
SHIFT REGISTER
SEGMENT DRIVER & LATCH
TEST
OSC
DO
DI
CL
CE
VDD
VDD1
VDD2
Vss
KI5 KI4 KI3 KI2 KI1
KS6 KS5 KS4 KS3
S42/KS2 S41/KS1
S5 S4/P4 S3/P3 S2/P2 S1/P1 COM1 COM2 COM3 S40
LC75853NW (IC601) : 1/3 LCD Driver
1. Pin layout
2. Block diagram
3. Pin function
1~4
5~40
41~43
44,45
46~49
50~54
60
61
62
63
64
O
O
O
I
I/O
O
I
I
I
S1/P1~S4/P4
S5~S40
COM1~COM3
KS1/S41,KS2/S42
KS3~KS6
KI1~KI5
OSC
DO
CE
CL
DI
Segment outputs for displaying the display data transferred by serial data input.
The S1/P1 ~ S4/P4 pins can be used as general purpose output under serial data control.
Common driver outputs.
The frame frequency f0 is given by : f0=(FOSC/384)Hz.
Key scan outputs. Although normal key scan timing lines to be inserted in the timing lines
to prevent shorts, since these outputs are unbalanced CMOS transistor outputs, these
outputs will not be damaged by shorting when these outputs are used to form a key
matrix. The KS1/S41 and KS2/S42 pins can be used as segment outputs when so
specified by the control data.
Key scan inputs. These pins have built-in pull-down resistors.
Oscillator connection. An oscillator circuit is formed by connecting an external
resistor and capacitor at this pin.
Serial data interface connections so the controller. Note that DO, being an open-drain
output, requires a pull-up resistor.
DO:Output data CE:Chip enable
CL:Synchronization DI:Data (LCD display)
Pin No. Symbol I/O Function