參數(shù)資料
型號: W921E400A
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, OTPROM, 4 MHz, MICROCONTROLLER, PDIP28
封裝: DIP-28
文件頁數(shù): 12/53頁
文件大?。?/td> 394K
代理商: W921E400A
W921E400A/W921C400
- 12 -
0FFH
0FEH
0FDH
0FCH
0FBH
0FAH
0F9H
0F8H
Stack 0
Stack 1
PC0
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PC8
PC9
PC10
PC11
Z
C
PC0
PC12
PC1
PC2
PC3
PC4
PC5
PC6
PC7
PC8
PC9
PC10
PC11
Z
C
PC12
6.2.3 Working Register Area
The located area from 040H to 04FH is known as working register. The instruction MOV WRn, A or
MOV A, WRn can move the A accumulator data to the working register or move working register data
to the A accumulator directly within the 1 word/1 machine cycle. The other direct instructions such as
MOV Mx, A or MOV A, Mx instruction are 2 words/2 machine cycles. Therefore the working register
can save the program memory size in ROM and improve the control speed in
μ
C application circuit.
Only the WR0 to WR7 are available in the arithmetic and logic operation (i.e. only 040H to 047H can
be active). The instructions are as follows:
ADD
ADC
SUB
SBC
ANL
ORL
XRL
CMP
A, WRx
A, WRx
A, WRx
A, WRx
A, WRx
A, WRx
A, WRx
A, WRx
where x = 0 to 7.
6.3 Internal Oscillator Circuit
TM0
TM2
TM3
Crystal Type or
RC Type
OSCI
OSCO
System Clock
(1/4)
11-bit
Prescaler
f
SYS
f
MUX3
MUX0
MUX2
f
TM0
f
TM2
f
TM3
OSC
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