ST7689 datasheet(2/195 Pages) SITRONIX

2 / 195 page

ST7689

Version 1.0

Page 2 of 195

2009/10

LIST OF CONTENT

LIST OF CONTENT .......................................................................................... 2

LIST OF FIGURES ........................................................................................... 6

LIST OF TABLES ............................................................................................. 7

1. INTRODUCTION ........................................................................................ 8

2. FEATURES................................................................................................. 9

3. PAD ARRANGEMENT (COG) .................................................................. 10

4. PAD CENTER COORDINATES ................................................................ 11

5. BLOCK DIAGRAM ................................................................................... 21

6. PIN DESCRIPTION................................................................................... 22

6.1. Power Supply ......................................................................................................... 22

6.2. LCD Power Supply Pins ......................................................................................... 23

6.3. System Control....................................................................................................... 24

6.4. Microprocessor Interface........................................................................................ 25

6.5. LCD DRIVER OUTPUTS ....................................................................................... 27

7. FUNCTIONAL DESCRIPTION.................................................................. 29

7.1. Microprocessor Interface........................................................................................ 29

7.1.1.

Selecting Parallel / Serial Interface .........................................................................................29

7.1.2.

8-bit or 16-bit Parallel Interface ...............................................................................................29

7.1.3.

8- and 9-bit Serial Interface......................................................................................................31

7.1.4.

8-bit and 9-bit Serial Interface Data Color Coding.................................................................33

7.2. Access to DDRAM and Internal Registers.............................................................. 37

7.3. Display Data RAM (DDRAM) ................................................................................. 38

7.3.1.

DDRAM ......................................................................................................................................38

7.3.2.

Address Control........................................................................................................................38

7.3.3.

I/O Buffer Circuit .......................................................................................................................41

7.3.4.

Scroll Address Circuit ..............................................................................................................41

7.3.5.

Display data Latch Circuit........................................................................................................41

7.3.6.

Normal Display On or Partial Mode On Vertical Scroll Off ...................................................41

7.3.7.

Vertical Scroll/Rolling Scroll....................................................................................................42

7.3.8.

Tearing Effect Output Line.......................................................................................................45

7.4. Gray-Scale Display ................................................................................................ 49

7.5. Oscillation Circuit ................................................................................................... 49

7.6. Display Timing Generator Circuit............................................................................ 49

7.7. Power Level Definition............................................................................................ 51

7.7.1.

Power ON/OFF Sequence ........................................................................................................51

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