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參數資料
| 型號： | W921E840 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-Bit Microcontroller(4位的微控制器) |
| 中文描述： | 4-BIT, EEPROM, 4 MHz, MICROCONTROLLER, PDIP40 |
| 封裝： | DIP-40 |
| 文件頁數： | 1/64頁 |
| 文件大小： | 603K |
| 代理商： | W921E840 |
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W921E840
4-BIT MICROCONTROLLER
Publication Release Date: August 1997
- 1 -
Revision A1
Table of Contents-
1. GENERAL DESCRIPTION.........................................................................................................................3
2. FEATURES.................................................................................................................................................3
3. PIN CONFIGURATION...............................................................................................................................6
40-pin DIP..................................................................................................................................................6
48-pin QFP.................................................................................................................................................7
4. PIN DESCRIPTION.....................................................................................................................................9
5. BLOCK DIAGRAM....................................................................................................................................10
6. FUNCTIONAL DESCRIPTION .................................................................................................................11
6.1 ROM Memory Map ...........................................................................................................................11
6.2 RAM Memory Map............................................................................................................................12
6.2.1 Special Control Register Area.................................................................................................12
6.2.2 Stack Register Area................................................................................................................14
6.2.3 Working Register Area............................................................................................................15
6.3 Internal Oscillator Circuit ...................................................................................................................15
6.4 Initial State ........................................................................................................................................16
6.5 Input/Output ......................................................................................................................................17
6.5.1 Normal/Special Function Selection of I/O................................................................................17
6.5.2 Pull High and Open Drain Control of I/O .................................................................................19
6.6 Serial Port.........................................................................................................................................21
6.7 DTMF Generator...............................................................................................................................24
6.8 Beep Tone Generator.......................................................................................................................25
6.9 D/A Converter...................................................................................................................................26
6.10 Comparator.....................................................................................................................................27
6.11 Timer/Counter.................................................................................................................................28
6.11.1 TM0......................................................................................................................................28
6.11.2 TM1......................................................................................................................................30
6.11.3 TM2......................................................................................................................................31
6.11.4 TM3......................................................................................................................................34
6.11.5 Arbitrary Waveform Generator..............................................................................................35
6.12 Interrupt...........................................................................................................................................35
6.12.1 Interrupt Control Register......................................................................................................36
6.12.2 Interrupt Enable Flag ............................................................................................................36
6.13 Operating Mode..............................................................................................................................37
6.13.1 Normal Mode........................................................................................................................37
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相關代理商/技術參數 |
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