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參數資料
型號: W921C400
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位的微控制器)
中文描述: 4-BIT, MROM, 4 MHz, MICROCONTROLLER, PDIP28
封裝: DIP-28
文件頁數: 36/53頁
文件大小: 399K
代理商: W921C400
W921E400A/W921C400
- 36 -
6.13 Initial Condition Register of EPROM Program Method
There is one 4-bit of the initial condition register (not part of the RAM) in W921E400A to control the
micro-controller initial status after power-on. The format is described as following:
INI register: (initial value = 0FH)
b3
b2
b1
b0
Reserved
0: osc acts as RC oscillator type
1: osc acts as crystal type
Reserved
Reserved
6.14 Reset
The W921E400A/W921C400 provides two reset methods, pull low RESETpin and watch dog timer
reset.
6.14.1 Reset by RESET
RESET
256 machine
cycle
Program executed
from address 000H
Reset all
control reg.
As RESET pin is pulled low, system and all control registers are reset to initial state. After RESET
pin is in high level, system will delay 256 machine cycle time then program is executed from address
000H.
6.14.2 Reset by Watch Dog Timer
STTM0.1
256 machine
cycle
Program executed
from address 000H
Reset all control regs
except STTM0.1
相關PDF資料
PDF描述
W921C840 4-Bit Microcontroller(4位微控制器)
W921E840A 4-Bit Microcontroller(4位微控制器)
W921E843A 4-BIT MICROCONTROLLER
W921C880 4-Bit Microcontroller(4位微控制器)
W921E880A 4-Bit Microcontroller(4位微控制器)
相關代理商/技術參數
參數描述
W921C840 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
W921C880 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Microcontroller
W921E400 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E400A 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER
W921E840 制造商:WINBOND 制造商全稱:Winbond 功能描述:4-BIT MICROCONTROLLER