HD66724 Datasheet, PDF(56/117 Page) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

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HD66724 Datasheet, PDF (56/117 Pages) Hitachi Semiconductor – (Graphics LCD Controller/Driver with Key Scan Function)

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HD66724/HD66725

RAM Data Initialization:

1. DDRAM

All addresses are initialized to 20H by the clear display instruction after the reset is canceled.

2. CGRAM/SEGRAM

This is not automatically initialized by reset input but must be initialized by software while display is

off (D = 0)

Output Pin Initialization:

1. LCD driver output pins (SEG/COM): Outputs GND level

2. Booster output pins (VLOUT): Outputs GND level

3. Oscillator output pin (OSC2): Outputs oscillation signal

4. Key strobe pins (KST0 to KST3): KST0 outputs GND level. KST1 to KST3 output VCC level.

5. Key scan interrupt pin (IRQ*): Outputs VCC level

6. General output port (PORT0âPORT2): Outputs GND level

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