參數(shù)資料
型號(hào)： ST62T45B
廠商： 意法半導(dǎo)體
元件分類： DRAM
英文描述： The CAT24FC02 is a 2-kb Serial CMOS EEPROM internally organized as 256 words of 8 bits each
中文描述： 該CAT24FC02是一個(gè)2 KB的EEPROM的國(guó)內(nèi)256個(gè)8位每字舉辦的串行CMOS
文件頁(yè)數(shù)： 23/72頁(yè)
文件大?。?/td> 514K
代理商： ST62T45B
23/72
ST62T45B/E45B
3.3 DIGITAL WATCHDOG
The digital Watchdog consists of a reloadable
downcounter timer which can be used to provide
controlled recovery from software upsets.
The Watchdog circuit generates a Reset when the
downcounter reaches zero. User software can
prevent this reset by reloading the counter, and
should therefore be written so that the counter is
regularly reloaded while the user program runs
correctly. In the event of a software mishap (usu-
ally caused by externally generated interference),
the user program will no longer behave in its usual
fashion and the timer register will thus not be re-
loaded periodically. Consequently the timer will
decrement down to 00h and reset the MCU. In or-
der to maximise the effectiveness of the Watch-
dog function, user software must be written with
this concept in mind.
Watchdog behaviour is governed by one option,
known
as
“WATCHDOG
HARDWARE or SOFTWARE) (SeeTable 7).
In the SOFTWARE option, the Watchdog is disa-
bled until bit C of the DWDR register has been set.
When the Watchdog is disabled, low power Stop
mode is available. Once activated, the Watchdog
cannot be disabled, except by resetting the MCU.
In the HARDWARE option, the Watchdog is per-
manently enabled. Since the oscillator will run
continuously, low power mode is not available.
The STOP instruction is interpreted as a WAIT in-
struction, and the Watchdog continues to count-
down.
When the MCU exits STOPmode (i.e. when an in-
terrupt is generated), the Watchdog resumes its
activity.
ACTIVATION”
(i.e.
Table 7. Recommended Option Choices
FunctionsRequired
Stop Mode
Watchdog
Recommended Options
“SOFTWAREWATCHDOG”
“HARDWARE WATCHDOG”
22
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參數(shù)描述
ST62T45BQ6 功能描述:8位微控制器 -MCU OTP EPROM 8K RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST62T45Q6 制造商:STMicroelectronics 功能描述:8BIT MCU - Bulk
ST62T46BB6 功能描述:8位微控制器 -MCU OTP EPROM 4K SPI RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST62T52CB6 功能描述:8位微控制器 -MCU OTP EPROM 2K No Intf RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
ST62T52CM3 制造商:STMicroelectronics 功能描述: 制造商:STMicroelectronics 功能描述:MCU 8BIT ST6 CISC 1836BYTE EPROM 5V 16SOIC - Rail/Tube
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