參數(shù)資料
型號(hào)： M38005S8-XXXSS
廠商： Mitsubishi Electric Corporation
元件分類： 串行ADC
英文描述： 8-Bit 41 kSPS ADC Serial Out, Ratiometric Op or Vcc Ref, TTL/MOS Input & Output Compatible, 4 Ch. 14-SOIC
中文描述： 8位單片機(jī)
文件頁數(shù)： 129/173頁
文件大?。?/td> 4203K
代理商： M38005S8-XXXSS
3800 GROUP USER’S MANUAL
3-27
APPENDIX
3.4 Countermeasures against noise
3.4.5 Providing of watchdog timer function by
software
If a microcomputer runs away because of noise or
others, it can be detected by a software watchdog
timer and the microcomputer can be reset to normal
operation. This is equal to or more effective than
program runaway detection by a hardware watchdog
timer. The following shows an example of a watchdog
timer provided by software.
In the following example, to reset a microcomputer to
normal operation, the main routine detects errors of
the interrupt processing routine and the interrupt
processing routine detects errors of the main routine.
This example assumes that interrupt processing is
repeated multiple times in a single main routine
processing.
<The main routine>
G
Assigns a single byte of RAM to a software watchdog
timer (SWDT) and writes the initial value N in the
SWDT once at each execution of the main routine.
The initial value N should satisfy the following
condition:
N+1
≥
(Counts of interrupt processing executed in each main routine)
Fig. 3.4.8 Watchdog timer by software
As the main routine execution cycle may change because of an interrupt processing or others, the initial value N
should have a margin.
G
Watches the operation of the interrupt processing routine by comparing the SWDT contents with counts of
interrupt processing count after the initial value N has been set.
G
Detects that the interrupt processing routine has failed and determines to branch to the program initialization
routine for recovery processing in the following cases:
If the SWDT contents do not change after interrupt processing
<The interrupt processing routine>
G
Decrements the SWDT contents by 1 at each interrupt processing.
G
Determins that the main routine operates normally when the SWDT contents are reset to the initial value N at
almost fixed cycles (at the fixed interrupt processing count).
G
Detects that the main routine has failed and determines to branch to the program initialization routine for recovery
processing in the following case:
When the contents of the SWDT reach 0 or less by continuative decrement without initializing to the initial value
N .
Main routine
(SWDT)
←
N
CLI
Main processing
(SWDT)
=N
Interrupt processing routine
errors
≠
N
=N
Interrupt processing routine
(SWDT)
←
(SWDT)—1
Interrupt processing
(SWDT)
≤
0
Main routine
errors
>
0
≤
0
RTI
Return
相關(guān)PDF資料
PDF描述
M38006E5-XXXSP 1 watt dc-dc converters
M38006E5-XXXSS 1 watt dc-dc converters
M38006M1-XXXFP 1 watt dc-dc converters
M38006M1-XXXFS 1 watt dc-dc converters
M38006M1-XXXSP 1 watt dc-dc converters
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M38007RSS 制造商:Renesas Electronics Corporation 功能描述:EMULATION MCU/8BIT CMOS EMULATION CHIP - Bulk
M38007T-ADS 功能描述:DEV TEMPORARY TARGET BOARD FOR M RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:適配器板 適用于相關(guān)產(chǎn)品:RCB230，RCB231，RCB212 配用:26790D-ND - RCB BREAKOUT BOARD RS232 CABLE
M38007T-PRB 功能描述:EV 64-PIN RSS/MCU TO .5, .65 & . RoHS:否 類別:編程器，開發(fā)系統(tǒng) >> 配件 系列:- 產(chǎn)品培訓(xùn)模塊:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program RoHS指令信息:IButton RoHS Compliance Plan 標(biāo)準(zhǔn)包裝:1 系列:- 附件類型:USB 至 1-Wire? RJ11 適配器 適用于相關(guān)產(chǎn)品:1-Wire? 設(shè)備 產(chǎn)品目錄頁面:1429 (CN2011-ZH PDF)
M3801 BK001 制造商:Alpha Wire 功能描述:CBL 3COND 18AWG BLK 1000'
M3801 BK002 制造商:Alpha Wire 功能描述:CBL 3COND 18AWG BLK 500'
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。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。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

我的聯(lián)系方式

*
*
*