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參數(shù)資料
型號(hào): W741E201
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, PDIP18
封裝: 0.300 INCH, PLASTIC, DIP-18
文件頁數(shù): 18/84頁
文件大小: 541K
代理商: W741E201
Preliminary W741E20X
- 18 -
I/O PIN
RC.n(RD.n)
DATA
BUS
Buffer
Output
PM4.n
(or PM5.n)
MOVA R, RC
(or MOVA R, RD)
instruction
MOV RC, R
(or MOV RD, R)
Instruction
Enable
Enable
Vdd
Input/Output Pin of the RC(RD)
Figure 9. Architecture of RC & RD Input/Output Pins
Port Enable Flag (PEF)
The port enable flag is organized as 4-bit binary register (PEF.0 to PEF.3). Before port RC may be
used to release the hold mode or preform interrupt function, the content of the PEF must be set first.
The PEF is controlled by the MOV PEF, #I instruction. The bit descriptions are as follows:
0
1
2
3
Note: W means write only.
PEF.0: Enable/disable the signal change at pin RC.0 to release hold mode or perform interrupt.
PEF.1: Enable/disable the signal change at pin RC.1 to release hold mode or perform interrupt.
PEF.2: Enable/disable the signal change at pin RC.2 to release hold mode or perform interrupt.
PEF.3: Enable/disable the signal change at pin RC.3 to release hold mode or perform interrupt.
PEF
w
w
w
w
Port Status Register 0 (PSR0)
Port status register 0 is organized as 4-bit binary register (PSR0.0 to PSR0.3). PSR0 can be read or
cleared by the MOVA R, PSR0, and CLR PSR0 instructions. The bit descriptions are as follows:
1
2
3
Note: R means read only.
R
R
R
R
0
PSR0
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