參數(shù)資料
型號: M34552M4-XXXFP
元件分類: 微控制器/微處理器
英文描述: 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48
封裝: 7 X 10 MM, 0.65 MM PITCH, PLASTIC, QFP-48
文件頁數(shù): 86/147頁
文件大?。?/td> 1091K
代理商: M34552M4-XXXFP
Rev.3.02
Dec 22, 2006
page 41 of 142
REJ03B0023-0302
4552 Group
Fig. 30 Program example to start/stop watchdog timer
Fig. 31 Program example to enter the mode when using the
watchdog timer
WRST
; WDF1 flag cleared
DI
DWDT
; Watchdog timer function enabled/disabled
WRST
; WEF and WDF1 flags cleared
WRST
; WDF1 flag cleared
NOP
DI
; Interrupt disabled
EPOF
; POF instruction enabled
POF
Oscillation stop
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 30).
The watchdog timer is not stopped with only the DWDT instruction.
The contents of WDF1 flag and timer WDT are initialized at the
power down mode.
When using the watchdog timer and the power down mode, initial-
ize the WDF1 flag with the WRST instruction just before the
microcomputer enters the power down state (refer to Figure 31).
The watchdog timer function is valid after system is returned from
the power down. When not using the watchdog timer function, ex-
ecute the DWDT instruction and the WRST instruction continuously
every system is returned from the power down, and stop the watch-
dog timer function.
相關PDF資料
PDF描述
M34552M8H-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48
M34553M4-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48
M34553M8H-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP48
M34554MC-XXXFP 4-BIT, MROM, 6 MHz, MICROCONTROLLER, PQFP64
M34554EDFP 4-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PQFP64
相關代理商/技術參數(shù)
參數(shù)描述
M34552M8H-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34552M8-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34552MXH-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34552MX-XXXFP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
M34553G8FP 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER