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參數資料
| 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： | 14/84頁 |
| 文件大小： | 486K |
| 代理商： | W741C20X |
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Preliminary W741C20X
- 14 -
Mode Register 1 (MR1)
Mode Register 1 is organized as a 4-bit binary register (MR1.0 to MR1.3). MR1 can be used to control
the operation of Timer 1. The bit descriptions are as follows:
W
W
W
W
0
1
2
3
MR1
Note: W means write only.
Bit 0 = 0 The internal fundamental frequency of Timer 1 is F
OSC
.
= 1 The internal fundamental frequency of Timer 1 is F
OSC
/64.
Bit 1 = 0 The fundamental frequency source of Timer 1 is the internal clock.
= 1 The fundamental frequency source of Timer 1 is the external clock from RC.0 input pin.
Bit 2 = 0 The specified waveform of the MFP generator is delivered at the MFP output pin.
= 1 The specified frequency of Timer 1 is delivered at the MFP output pin.
Bit 3 = 0 Timer 1 stops down-counting.
= 1 Timer 1 starts down-counting.
Input/Output Ports RA, RB
Port RA consists of pins RA.0 to RA.3 and Port RB consists of pins RB.0 to RB.3. At initial reset,
input/output ports RA and RB are both in input mode. When RA and RB are used as output ports,
CMOS or NMOS open drain output type can be selected by the PM0 register. Each pin of port RA or
RB can be specified as input or output mode independently by the PM1 and PM2 registers. The
MOVA R, RA or MOVA R, RB instructions operate the input functions and the MOV RA, R or MOV
RB, R operate the output functions. For more details, refer to the instruction table and Figure 7.
I/O PIN
RA.n(RB.n)
DATA
BUS
Buffer
Output
PM0.0 (or PM0.1)
PM1.n
(or PM2.n)
MOVA R, RA
(or MOVA R, RB)
instruction
MOV RA, R
(or MOV RB, R)
Instruction
Enable
Enable
VDD
Input/Output Pin of the RA(RB)
Figure 7. Architecture of RA & RB Input/Output Pins
相關PDF資料 |
PDF描述 |
|---|---|
| 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 |
| W741E260 | 4-BIT FLASH MICROCONTROLLER |
相關代理商/技術參數 |
參數描述 |
|---|---|
| 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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