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參數資料
| 型號： | W741E205 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT FLASH MICROCONTROLLER |
| 中文描述： | 4-BIT, FLASH, 4 MHz, MICROCONTROLLER, PDSO28 |
| 封裝： | 0.300 INCH, SKINNY, PLASTIC, SOP-28 |
| 文件頁數： | 16/84頁 |
| 文件大小： | 541K |
| 代理商： | W741E205 |
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Preliminary W741E20X
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Bit 0 = 0 RB.0 works as output pin; Bit 0 = 1 RB.0 works as input pin
Bit 1 = 0 RB.1 works as output pin; Bit 1 = 1 RB.1 works as input pin
Bit 2 = 0 RB.2 works as output pin; Bit 2 = 1 RB.2 works as input pin
Bit 3 = 0 RB.3 works as output pin; Bit 3 = 1 RB.3 works as input pin
At initial reset, the port RB is input mode (PM2 = 1111B).
Port Mode 3 Register (PM3)
Port Mode 3 Register is organized as a 4-bit binary register (PM3.0 to PM3.3). PM3 can be used to
determine the operating mode of the output port RE and the clock rate of the serial I/O function. The
PM3 control diagram is shown in Figure 8. The bit descriptions are as follows:
W
W
0
1
2
3
PM3
Note: W means write only.
Bit 0 is reserved.
Bit 1 = 0 The output of the port RE is the output of the internal parallel port RT.
= 1 The port RE works as the serial input/output port.
Bit 2 is reserved.
Bit 3 = 0 Serial Tx rate = Fosc/2
= 1 Serial Tx rate = Fosc/256
PM3.1
MUX.
Internal parallel port RT
Port RE
Fosc/2
PM3.3
Fosc/256
Serial I/O port
Figure 8. PM3 Control Diagram
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:
Note: W means write only.
PM4
w
w
w
0
1
2
w
3
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相關代理商/技術參數 |
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| W741E20X | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT FLASH MICROCONTROLLER |
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| W741L250 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W741L260 | 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER |
| W7422-A | 制造商:Coilcraft Inc 功能描述:NOT RoHS. Transformer, for Motorola MC33374 |
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