參數(shù)資料
型號(hào): M34501E4FP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, OTPROM, MICROCONTROLLER, PDSO20
封裝: 5.30 X 12.60 MM, 1.27 MM PITCH, PLASTIC, SOP-20
文件頁數(shù): 46/118頁
文件大?。?/td> 952K
代理商: M34501E4FP
4501 Group
Rev.3.01
2005.02.07
page 31 of 112
REJ03B0104-0301
Fig. 26 Program example to start/stop watchdog timer
Fig. 27 Program example to enter the RAM back-up mode
when using the watchdog timer
WRST
; WDF1 flag cleared
NOP
DI
; Interrupt disabled
EPOF
; POF instruction enabled
POF
Oscillation stop (RAM back-up mode)
When the watchdog timer is used, clear the WDF1 flag at the pe-
riod of 65534 machine cycles or less with the WRST instruction.
When the watchdog timer is not used, execute the DWDT instruc-
tion and the WRST instruction continuously (refer to Figure 26).
The watchdog timer is not stopped with only the DWDT instruction.
The contents of WDF1 flag and timer WDT are initialized at the
RAM back-up mode.
When using the watchdog timer and the RAM back-up mode, ini-
tialize the WDF1 flag with the WRST instruction just before the
microcomputer enters the RAM back-up state (refer to Figure 27)
The watchdog timer function is valid after system is returned from
the RAM back-up. When not using the watchdog timer function, ex-
ecute the DWDT instruction and the WRST instruction continuously
every system is returned from the RAM back-up, and stop the
watchdog timer function.
WRST
; WDF1 flag cleared
DI
DWDT
; Watchdog timer function enabled/disabled
WRST
; WEF and WDF1 flags cleared
相關(guān)PDF資料
PDF描述
M34501M4-XXXFP 4-BIT, MROM, MICROCONTROLLER, PDSO20
M34501E4FP 4-BIT, OTPROM, MICROCONTROLLER, PDSO20
M34502M2-XXXFP 4-BIT, MROM, MICROCONTROLLER, PDSO24
M34502M4-XXXFP 4-BIT, MROM, MICROCONTROLLER, PDSO24
M34506M4-XXXFP 4-BIT, MROM, MICROCONTROLLER, PDSO20
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M34501M2 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34501M2-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34501M4 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34501M4-XXXFP 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34502E4 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER