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參數(shù)資料
型號: W921E843A
廠商: WINBOND ELECTRONICS CORP
元件分類: 微控制器/微處理器
英文描述: 4-BIT MICROCONTROLLER
中文描述: 4-BIT, OTPROM, 4 MHz, MICROCONTROLLER, PDIP40
封裝: DIP-40
文件頁數(shù): 15/58頁
文件大小: 449K
代理商: W921E843A
W921E840A/W921C840
Publication Release Date: July 1999
- 15 - Revision A3
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,
A,
A,
A,
A,
A,
A,
A,
WRx
WRx
WRx
WRx
WRx
WRx
WRx
WRx
where x = 0 to 7.
6.3 Internal Oscillator Circuit
There are dual clocks in this chip, one high speed, the other low speed. The block diagram is shown
below:
TM0
TM1
TM2
TM3
MUX0
MUX3
MUX1
MUX2
f
TM0
f
TM1
f
TM2
f
TM3
Crystal Type or
RC Type
OSCI
OSCO
System Clock
(1/4)
11-bit
Prescaler
f
SYS
H
f
Crystal Type
XT
XT
1-bit
scaler
(1/2)
2-bit scaler
(1/4)
f
OSC
L
f
MUX0'
5-bit
Prescaler
f
SYS0
f
SYS1
1
f
2
f
SYSCCR.3
Mask
SYSCCR.0
Enable
Enable
(SYSCCR.1)
(SYSCCR.2)
f
SUB
相關PDF資料
PDF描述
W921C880 4-Bit Microcontroller(4位微控制器)
W921E880A 4-Bit Microcontroller(4位微控制器)
W921E840 4-Bit Microcontroller(4位的微控制器)
W921E880 4-Bit Microcontroller(4位的微控制器)
W921F840 4-Bit Microcontroller(4位的微控制器)
相關代理商/技術參數(shù)
參數(shù)描述
W921E880 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E880A 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W925C240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller
W925C625 制造商:WINBOND 制造商全稱:Winbond 功能描述:8-bit CID MICROCONTROLLER
W925E240 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Telephone Controller