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參數資料
| 型號： | W921E400A |
| 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位微控制器) |
| 中文描述： | 4-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP28 |
| 封裝： | DIP-28 |
| 文件頁數： | 1/53頁 |
| 文件大小： | 394K |
| 代理商： | W921E400A |
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W921E400A/W921C400
4-BIT MICROCONTROLLER
Publication Release Date: July 1998
- 1 -
Revision A3
Table of Contents-
1. GENERAL DESCRIPTION.........................................................................................................................3
2. FEATURES.................................................................................................................................................3
3. PIN CONFIGURATION...............................................................................................................................5
4. PIN DESCRIPTION.....................................................................................................................................6
5. BLOCK DIAGRAM......................................................................................................................................7
6. FUNCTION DESCRIPTION........................................................................................................................8
6.1 ROM Memory Map ..............................................................................................................................8
6.2 RAM Memory Map...............................................................................................................................9
6.2.1 Special Control Register Area....................................................................................................9
6.2.2 Stack Register Area.................................................................................................................11
6.2.3 Working Register Area.............................................................................................................12
6.3 Internal Oscillator Circuit.....................................................................................................................12
6.4 Initial State .........................................................................................................................................13
6.5 Input/Output........................................................................................................................................13
6.5.1 Normal/Special function selection of I/O...................................................................................14
6.5.2 Pull High and Open Drain Control of I/O ..................................................................................15
6.6 Serial Port..........................................................................................................................................18
6.7 DTMF Generator................................................................................................................................20
6.8 Beep Tone Generator........................................................................................................................22
6.9 Comparator........................................................................................................................................22
6.10 Timer/Counter..................................................................................................................................24
6.10.1 TM0.......................................................................................................................................24
6.10.2 TM2.......................................................................................................................................26
6.10.3 TM3.......................................................................................................................................28
6.10.4 Arbitrary Waveform Generator...............................................................................................29
6.11 Interrupt............................................................................................................................................30
6.11.1 Interrupt Control Register.......................................................................................................30
6.11.2 Interrupt Enable Flag .............................................................................................................31
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