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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： | 3/64頁 |
| 文件大小： | 603K |
| 代理商： | W921E840 |
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W921E840
Publication Publication Release Date: August 1997
- 3 - Revision A1
1. GENERAL DESCRIPTION
The W921E840 is a single-chip CMOS 4-bit microcontroller that is a subset of W921E880. It features
four multi-function timers, one channel DTMF generator, an 8-bit D/A converter circuit, eight interrupt
sources, 48-level subroutine nesting, and built in four by one channel comparator circuit. Two power
down modes, hold and stop mode, reduce power dissipation. The excellent memory structure, 8K
super EPROM for program code and 512 x 4 bit RAM minimize the need for external memory
devices.
W921E840 is a powerful microcontroller for wide range consuming applications, requiring few
external components, which is especially suited for telecommunication design.
2. FEATURES
Operating Voltage
2.7 to 5.5 V operating voltage
Operating Frequency
Crystal or RC for main system clock
Crystal for 400K, 800K, 2M, 3.58M, 4MHz
RC up to 4MHz
Memory
8K
×
10-bit ROM (super EPROM)
512
×
4-bit RAM
64
×
4-bit special registers
16
×
4-bit working registers
128
×
4-bit general registers
304
×
4-bit multi-purpose registers
Stack
8-bit stack pointer
I/O Pins
20 bidirectional and individually controllable I/O lines
P2 Port: P2.0 to P2.3 large sink current pins and open drain option
P3 Port: P3.0 to P3.3 multi-function I/O
P4 Port: P4.0 to P4.3 open drain and pull high resistor option, multi-function I/O
P5 Port: P5.0 to P5.3 multi-function I/O
P6 Port: P6.0 to P6.3 open drain and pull high resistor option, multi-function I/O
14 bidirectional I/O lines
PA Port: PA.0 to PA.3 open drain and pull high resistor option
相關PDF資料 |
PDF描述 |
|---|---|
| W921E880 | 4-Bit Microcontroller(4位的微控制器) |
| W921F840 | 4-Bit Microcontroller(4位的微控制器) |
| W9310 | Direct Sequence Spread Spectrum Transceiver(直接序列擴展頻譜收發器) |
| W9320 | ADPCM Codec(ADPCM編解碼器) |
| W9321 | ADPCM Codec(ADPCM編解碼器) |
相關代理商/技術參數 |
參數描述 |
|---|---|
| W921E840A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E843A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E880 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E880A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W925C240 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller |
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