JVC KD-SH99R service manual LC75878W IC501 LCD driver

KD-SH99R

LC75878W (IC501) : LCD driver

1. Pin layout
		100	~	76
		1			75
		~			~
		25			51
		26	~	50	COM8	S75/COM9 S74/COM10 S73
2. Block diagram	P1	P4		COM1			S1
	GENERAL			COMMON		SEGMENT DRIVER & LATCH
		PORT			DRIVER
OSC		CLOCK				CONTROL
	GENERATOR					REGISTER
VLCD
	CONTRAST					SHIFT REGISTER
	ADJUSTER
VLCD0
VLCD1						CCB
VLCD2
						INTERFACE
VLCD3
VLCD4
VDD
VSS

3. Pin function				INH	DI	CL	CE
	No.	Symbol	I/O		Function
	1~73	SEG1~SEG73	O	Segment driver output pin.
	74	SEG74	O	Segment driver output pin.
	75	SEG75	O	Segment driver output pin.
	76~83	COM8~COM1	O	Common driver output pin.
	84~87	P1~P4	O	General-purpose output pin.
	88	VDD	-	Logic block power supply pin.
	89	VLCD	-	LCD driver power supply pin.
	90	VLCD0	O	LCD driver bias 4/4 voltage (H-level) power pin.
	91	VLCD1	I	LCD driver bias 3/4 voltage (intermediate level) power pin.
	92	VLCD2	I	LCD driver bias 2/4 voltage (intermediate level) power pin.
	93	VLCD3	I	LCD driver bias 1/4 voltage (intermediate level) power pin.
	94	VLCD4	I	LCD driver bias 0/4 voltage (L-level) power pin.
	95	VSS	-	Power supply pin to connect to ground.
	96	OSC	I/O	Oscillator pin.
	97	LCD RESET	I	Display off, general-purpose output port		L	fixed input pin.
	98	CE	I	Chip enable
	99	CL	I	Synchronization clock
	100	DI	I	Transfer data

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