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參數(shù)資料
| 型號： | W741C20X |
| 廠商： | WINBOND ELECTRONICS CORP |
| 英文描述： | 4-BIT MICROCONTROLLER |
| 中文描述： | 4位微控制器 |
| 文件頁數(shù)： | 17/84頁 |
| 文件大小： | 486K |
| 代理商： | W741C20X |
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Preliminary W741C20X
Publication Release Date: March 1998
- 17 -
Revision A3
Port Mode 4 Register (PM4)
The port mode 4 register is organized as 4-bit binary register (PM4.0 to PM4.3). PM4 can be used to
control the input/output mode of port RC. PM4 is controlled by the MOV PM4, #I instruction. The bit
descriptions are as follows:
PM4
w
w
w
0
1
2
w
3
Note: W means write only.
Bit 0 = 0 RC.0 works as output pin; Bit 0 = 1 RC.0 works as input pin
Bit 1 = 0 RC.1 works as output pin; Bit 1 = 1 RC.1 works as input pin
Bit 2 = 0 RC.2 works as output pin; Bit 2 = 1 RC.2 works as input pin
Bit 3 = 0 RC.3 works as output pin; Bit 3 = 1 RC.3 works as input pin
At initial reset, port RC is input mode (PM4 = 1111B).
Port Mode 5 Register (PM5)
The port mode 5 register is organized as 4-bit binary register (PM5.0 to PM5.3). PM5 can be used to
control the input/output mode of port RD. PM5 is controlled by the MOV PM5, #I instruction. The bit
descriptions are as follows:
PM5
w
w
w
0
1
2
w
3
Note: W means write only.
Bit 0 = 0 RD.0 works as output pin; Bit 0 = 1 RD.0 works as input pin
Bit 1 = 0 RD.1 works as output pin; Bit 1 = 1 RD.1 works as input pin
Bit 2 = 0 RD.2 works as output pin; Bit 2 = 1 RD.2 works as input pin
Bit 3 = 0 RD.3 works as output pin; Bit 3 = 1 RD.3 works as input pin
At initial reset, the port RB is input mode (PM2 = 1111B).
Input/Output Ports RC, RD
Port RC consists of pins RC.0 to RC.3, and port RD consists of pins RD.0 to RD.3. At initial reset,
input/output ports RC and RD are both in input mode. When RC and RD are used as output ports, the
CMOS type is the only ouput driving type. Each pin of port RC or RD can be specified as input or
output mode independently by the PM4 and PM5 registers. The MOVA R, RC or MOVA R, RD
instructions operate the input functions and the MOV RC, R or MOV RD, R operate the output
functions. When the PEF, HEF, and IEF corresponding to the RC port are set, a signal change at the
specified pins of port RC will execute the hold mode release or interrupt subroutine. Port status
register 0 (PSR0) records the status of port RC, and that can be read out and cleared by the MOV R,
PSR0, and CLR PSR0 instructions. Before the port mode of the RC port is changed from output
mode to input mode in the hold mode release and interrupt application, the output value must be
preset to the same as the system status to prevent the undesired signal change being accepted.
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PDF描述 |
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| W741C240 | 4-BIT Microcontroller(多次可編程4位的微控制器) |
| W741C250 | 4-BIT Microcontroller(多次可編程4位的微控制器) |
| W741C260 | 4-BIT Microcontroller(多次可編程4位的微控制器) |
| W741E20X | 4-BIT FLASH MICROCONTROLLER |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W741C250 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| W741C260 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W741E200 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:4-Bit Microcontroller |
| W741E201 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
| W741E202 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
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