HD66760 Datasheet, PDF (40/105 Pages) Hitachi Semiconductor – 104 X 80-dot Graphics LCD Controller/Driver for 256 Colors

HD66760
Reset Function
The HD66760 is internally initialized by RESET input. Because the busy flag (BF) indicates a busy state (BF
= 1) during the reset period, no instruction or GRAM data access from the MPU is accepted. The reset input
must be held for at least 1 ms. Do not access the GRAM or initially set the instructions until the R-C
oscillation frequency is stable after power has been supplied (10 ms).
Instruction Set Initialization:
1. Start oscillation executed
2. Driver output control (NL3–0 = 1001, SGS = 0, CMS = 0)
3. B-pattern waveform AC drive (RST = 0, B/C = 0, ECR = 0, NW4–0 = 00000)
4. Power control (PS1–0 = 00, DC1–0 = 00, AP1–0 = 00: LCD power off, SLP = 0: Sleep mode off, STB =
0: Standby mode off)
5. 1/10 bias drive (BS2–0 = 001), Three-times step-up (BT1–0 = 00), Weak contrast (CT6–0 = 0000000)
6. Entry mode set (SWP = 0, I/D = 1: Increment by 1, AM = 0: Horizontal move, LG2–0 = 000: Replace
mode)
7. Compare register (CP7–0: 00000000)
8. Display control (VLE2–1 = 00: No vertical scroll, SPT = 0, E = 0, B/W = 0, GS = 0: Eight-grayscale
mode, REV = 0, D1–0 = 00: Display off)
9. Cursor control (CR/CG/CB = 000, C = 0: Cursor display off, CM1–0 = 00)
10. Vertical scroll (VL26–20 = 000000, VL16–10 = 000000)
11. Window cursor display position (HS6–0 = HE6–0 = VS6–0 = VE6–0 = 00000000)
12. 1st screen division (SS16–10 = 00000000, SE16–10 = 11111111)
13. 2nd screen division (SS26–20 = 00000000, SE26–20 = 11111111)
14. RAM write data mask (WM15–0 = 0000H: No mask)
15. RAM address set (AD14–0 = 0000H)
16. Grayscale palette
(RK03–00 = 0000, RK13–10 = 0011, RK23–20 = 0101, RK33–30 = 0111,
RK43–40 = 1001, RK53–50 = 1011, RK63–60 = 1101, RK73–70 = 1111,
GK03–00 = 0000, GK13–10 = 0011, GK23–20 = 0101, GK33–30 = 0111,
GK43–40 = 1001, GK53–50 = 1011, GK63–60 = 1101, GK73–70 = 1111,
BK03–00 = 0000, BK13–10 = 0101, BK23–20 = 1001, BK33–30 = 1111)
GRAM Data Initialization:
This is not automatically initialized by reset input but must be initialized by software while display is off (D1-
0 = 00).
Output Pin Initialization:
1. LCD driver output pins (SEG/COM): Output GND level
2. Step-up circuit output pin (VLOUT): Outputs Vcc level
3. Oscillator output pin (OSC2): Outputs oscillation signal