參數(shù)資料
型號(hào)： GMS87C2020K
廠商： HYNIX SEMICONDUCTOR INC
元件分類： 微控制器/微處理器
英文描述： HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS
中文描述： 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP64
封裝： SDIP-64
文件頁(yè)數(shù)： 47/107頁(yè)
文件大?。?/td> 1482K
代理商： GMS87C2020K
HMS81C2012A/2020A
SEP. 2004 Ver 2.00
43
Watchdog Timer Control
Figure 11-2 shows the watchdog timer control register.
The watchdog timer is automatically disabled after reset.
The CPU malfunction is detected during setting of the de-
tection time, selecting of output, and clearing of the binary
counter. Clearing the binary counter is repeated within the
detection time.
If the malfunction occurs for any cause, the watchdog tim-
er output will become active at the rising overflow from
the binary counters unless the binary counter is cleared. At
this time, when WDTON=1, a reset is generated, which
drives the RESET pin to low to reset the internal hardware.
When WDTON=0, a watchdog timer interrupt (WDTIF) is
generated.
The watchdog timer temporarily stops counting in the
STOP mode, and when the STOP mode is released, it au-
tomatically restarts (continues counting).
Figure 11-2 WDTR: Watchdog Timer Data Register
Example: Sets the watchdog timer detection time to 0.5 sec at 4.19MHz
7
6
5
4
3
2
1
0
Clear count flag
0: Free-run count
1: When the WDTCL is set to "1", binary counter
is cleared to “0”. And the WDTCL becomes “0” automatically
after one machine cycle. Counter count up again.
INITIAL VALUE: 0111_1111
B
ADDRESS: 0ED
H
WDTR
W
W
W
W
7-bit compare data
W
W
W
W
NOTE:
The WDTON bit is in register CKCTLR.
WDTCL
LDM
LDM
CKCTLR,#3FH
WDTR,#04FH
;
Select 1/2048 clock source
,
WDTON
←
1, Clear Counter
LDM
:
:
:
:
LDM
:
:
:
:
LDM
WDTR,#04FH
;
Clear counter
WDTR,#04FH
;
Clear counter
WDTR,#04FH
;
Clear counter
Within WDT
detection time
Within WDT
detection time
相關(guān)PDF資料
PDF描述
GMS87C2020LQ MEMORY CARD COMPACTFLASH 128MB
GMS87C2020Q HYUNDAI MICRO ELECTRONICS 8-BIT SINGLE-CHIP MICROCONTROLLERS
GNR60S201JR Catalog number system
GNR40B201J4 Catalog number system
GNR40B201JA Catalog number system
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
GMS87C2020LQ 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver
GMS87C2020Q 制造商:未知廠家 制造商全稱:未知廠家 功能描述:CMOS Single-Chip 8-Bit Microcontroller with A/D Converter & VFD Driver
GMS87C2120 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
GMS87C2120K 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
GMS87C2120Q 制造商:HYNIX 制造商全稱:Hynix Semiconductor 功能描述:HYNIX SEMICONDUCTOR 8-BIT SINGLE-CHIP MICROCONTROLLERS
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*