HD66740 Datasheet, PDF (36/95 Pages) Hitachi Semiconductor – 112 x 80-dot Graphics LCD Controller/Driver

HD66740
Reset Function
The HD66740 is internally initialized by RESET input. The reset input must be held for at least 1 ms.
Instruction Set Initialization:
1. Start oscillation executed
2. Driver output control (SGS = 0, CMS = 0)
3. Power control (AMP = 0: LCD power off, SLP = 0: Sleep mode off, STB = 0: Standby mode off)
4. Three times boost (BT1/0 = 00), 1/10 bias drive (BS2/1/0 = 000), Weak contrast (CT5-0 = 00000)
5. Entry mode set (REV = 0: Normal display, I/D = 1: Increment by 1, RDM = 0: Automatically
update after reading)
6. Display on/off control (D = 0: Display off, CEN = 0: Normal position)
7. Display line control (NL3/2/1/0 = 1001: 1/80 duty ratio)
8. Double-height display off (DL10–1 = 0000000000)
9. Vertical scroll control (SN3/2/1/0 = 0000: First line displayed at the top, SL2/1/0: First raster-row
displayed at the top of the first line, PS1/0 = 00: Partial scroll off)
10. 1/64-divided clock boost (DCC = 0)
11. B-pattern waveform AC drive (B/C = 0, EOR = 0, NW4/3/2/1/0 = 00000)
RAM Data Initialization:
1. CGRAM
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
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