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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： | 21/64頁 |
| 文件大小： | 603K |
| 代理商： | W921E840 |
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W921E840
Publication Publication Release Date: August 1997
- 21 - Revision A1
ù
PA, PB, PC, PD:
PABCDPH register: (address = 007H, default data = 0H)
b3
b2
b1
b0
0:
1:
0:
1:
0:
1:
0:
1:
PA (4 pins) without pull-high resistor
PA (4 pins) with pull-high resistor
PB (4 pins) without pull-high resistor
PB (4 pins) with pull-high resistor
PC (3 pins) without pull-high resistor
PC (3 pins) with pull-high resistor
PD (2 pins) without pull-high resistor
PD (2 pins) with pull-high resistor
PABCDTP register: (address = 008H, default data = 0H)
b3
b2
b1
b0
0:
1:
0:
1:
0:
1:
0:
1:
PA (4 pins) work as CMOS type
PA (4 pins) work as open-drain type
PB (4 pins) work as CMOS type
PB (4 pins) work as open-drain type
PC (3 pins) work as CMOS type
PC (3 pins) work as open-drain type
PD (2 pins) work as CMOS type
PD (2 pins) work as open-drain type
ù
P2:
P2TP register: (address = 00DH, default data = 0H)
b3
b2
b1
b0
0:
1:
P2 (4 pins) work as CMOS type
P2 (4 pins) work as open-drain type
Reserved
Reserved
0:
1:
PC.3 works as normal I/O port (CMOS type)
PC.3 works as 32.768KHz output buffer
(open-drain type) only for W921E841,
843, 844
6.6 Serial Port
The W921E840 has a clock-synchronous serial interface which transmits and receives 8-bit data as
default. User can program the P6IO register to select port P6 as the serial port. The serial
transmitter/receiver function can be operated with multi-nibble function and the LSB of every nibble is
transmitted/received first.
The serial transmitted/received data are come from or are stored into the serial buffer registers
(address 050H to 14EH); how many nibbles will be transmitted/received is decided by the serial MSB
nibble register (SRMNR, address = 00AH) and serial LSB nibble register (SRLNR, address = 009H).
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| W921E880 | 4-Bit Microcontroller(4位的微控制器) |
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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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