Datenblatt-Suchmaschine für elektronische Bauteile |
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ST7687S Datenblatt(PDF) 2 Page - Sitronix Technology Co., Ltd. |
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ST7687S Datenblatt(HTML) 2 Page - Sitronix Technology Co., Ltd. |
2 / 195 page ST7687S Ver1.4 2/195 2009/10 LIST OF CONTENT 1. INTRODUCTION.......................................................................................8 2. FEATURES ...............................................................................................9 3. ST7687S 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 6.6 Test Pins ........................................................................................................ 28 7. FUNCTIONAL DESCRIPTION................................................................30 7.1 Microprocessor Interface ............................................................................... 30 7.2 Selecting Parallel / Serial Interface ................................................................ 31 7.2.1. 8-bit Parallel Interface................................................................................................... 31 7.2.2. 8- and 9-bit Serial Interface .......................................................................................... 32 7.2.3. 8-bit and 9-bit Serial Interface Data Color Coding..................................................... 35 7.3 Access to DDRAM and Internal Rrgisters ...................................................... 36 7.4 Display Data RAM (DDRAM) ......................................................................... 37 7.4.1. DDRAM........................................................................................................................... 37 7.4.2. Address Control ............................................................................................................ 37 7.4.3. I/O Buffer Circuit ........................................................................................................... 40 7.4.4. Scroll Address Circuit .................................................................................................. 40 7.4.5. Display data Latch Circuit............................................................................................ 40 7.4.6. Normal Display On or Partial Mode On, Vertical Scroll Off ...................................... 40 7.4.7. Vertical Scroll/Rolling Scroll........................................................................................ 42 7.4.8. Tearing Effect Output Line........................................................................................... 45 7.5 Gray-Scale Display ........................................................................................ 47 7.6 Oscillation circuit ............................................................................................ 47 7.7 Display Timing Generator Circuit ................................................................... 47 7.8 Power Level Definition ................................................................................... 49 7.8.1. Power ON/OFF SEQUENCE ......................................................................................... 49 7.8.2. Power Levels ................................................................................................................. 50 7.9 Liquid Crystal Driver Power Circuit ................................................................ 51 7.9.1. Voltage Regulator Circuits........................................................................................... 51 7.9.2. Voltage Follower Circuits............................................................................................. 55 |
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