JVC KW-XC828 Service Manual page 43

LC75878W (IC501) : LCD driver
1. Pin layout
1
~
25
2. Block diagram
GENERAL
PORT
CLOCK
OSC
GENERATOR
VLCD
CONTRAST
ADJUSTER
VLCD0
VLCD1
VLCD2
VLCD3
VLCD4
VDD
VSS
3. Pin function
No. Symbol
1~73 SEG1~SEG73
74 SEG74
75
SEG75
76~83 COM8~COM1
84~87 P1~P4
88 VDD
89 VLCD
90
VLCD0
91 VLCD1
92 VLCD2
93
VLCD3
94 VLCD4
95 VSS
96
OSC
97 LCD RESET
98 CE
99 CL
100 DI
100 ~ 76
75
~
51
26 ~ 50
COMMON
DRIVER
I/O
O Segment driver output pin.
O Segment driver output pin.
O Segment driver output pin.
O Common driver output pin.
O General-purpose output pin.
- Logic block power supply pin.
- LCD driver power supply pin.
O LCD driver bias 4/4 voltage (H-level) power pin.
I LCD driver bias 3/4 voltage (intermediate level) power pin.
I LCD driver bias 2/4 voltage (intermediate level) power pin.
I
LCD driver bias 1/4 voltage (intermediate level) power pin.
I LCD driver bias 0/4 voltage (L-level) power pin.
- Power supply pin to connect to ground.
I/O Oscillator pin.
I Display off, general-purpose output port L fixed input pin.
I Chip enable
I Synchronization clock
I Transfer data
SEGMENT DRIVER & LATCH
CONTROL
REGISTER
SHIFT REGISTER
CCB
INTERFACE
Function
KW-XC828
1-43