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參數資料
| 型號： | W921C880 |
| 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, MROM, 4 MHz, MICROCONTROLLER, PQFP80 |
| 封裝： | QFP-80 |
| 文件頁數： | 17/57頁 |
| 文件大小： | 372K |
| 代理商： | W921C880 |
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W921E880A/W921C880
Publication Release Date: September 1998
- 17 -
Revision A2
* PC.0
PC.3:
Normal I/O pins only.
Normal function is the same as port P0
* PD.0
PD.3:
Normal I/O pins only.
Normal function is the same as port P0
* PE.0
PE.3:
Normal I/O pins only.
Normal function is the same as port P0
* PF.0
PF.3:
Normal I/O pins only.
Normal function is the same as port P0
6.5.1 I/O Pull High and Open Drain Control
Some of the above I/O ports can be set up with a pull-high resistor or as an open drain. The user can
program the I/O through the special register so that the I/O can have a pull-high resistor or open drain
characteristics.
All pull-high resistors in the following table are 400 K
in a 3.0 voltage test condition. After a power
on reset the following special reg. will all reset to "0000".
* P4.0
P4.3:
P4PH REG: (ADDRESS = 003H)
(Default data = 0H)
b3
b2
b1
b0
0:
1:
0:
1:
0:
1:
0:
1:
P4.0 without pull-high resistor
P4.0 with pull-high resistor
P4.1 without pull-high resistor
P4.1 with pull-high resistor
P4.2 without pull-high resistor
P4.2 with pull-high resistor
P4.3 without pull-high resistor
P4.3 with pull-high resistor
P4TP REG: (ADDRESS = 004H)
(Default data = 0H)
b3
b2
b1
b0
0:
1:
0:
1:
0:
1:
0:
1:
P4.0 work as CMOS type
P4.0 work as Open-drain type
P4.1 work as CMOS type
P4.1 work as Open-drain type
P4.2 work as CMOS type
P4.2 work as Open-drain type
P4.3 work as CMOS type
P4.3 work as Open-drain type
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相關代理商/技術參數 |
參數描述 |
|---|---|
| W921E400 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E400A | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W921E840 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| 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 |
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