ST7689
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
Version 1.0
Page 2 of 195
2009/10