- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄98143 > ST6246BB6/XXX (STMICROELECTRONICS) 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP56 PDF資料下載
參數(shù)資料
| 型號： | ST6246BB6/XXX |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP56 |
| 封裝： | 0.600 INCH, PLASTIC, SDIP-56 |
| 文件頁數(shù)： | 15/73頁 |
| 文件大?。?/td> | 1806K |
| 代理商： | ST6246BB6/XXX |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁當(dāng)前第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁
Obsolete
Product(s)
- Obsolete
Product(s)
Obsolete
Product(s)
- Obsolete
Product(s)
22/73
ST62T46B/E46B
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 (usual-
ly 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 Watchdog
function, user software must be written with this
concept in mind.
Watchdog behaviour is governed by one option,
known
as
“WATCHDOG
ACTIVATION”
(i.e.
HARDWARE or SOFTWARE) (See Table 6).
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 con-
tinuously, low power mode is not available. The
STOP instruction is interpreted as a WAIT instruc-
tion, and the Watchdog continues to countdown.
When the MCU exits STOP mode (i.e. when an in-
terrupt is generated), the Watchdog resumes its
activity.
Table 6. Recommended Option Choices
Functions Required
Recommended Options
Stop Mode
“SOFTWARE WATCHDOG”
Watchdog
“HARDWARE WATCHDOG”
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| ST6260BB6 | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP20 |
| ST6294B8/XXX | 8-BIT, MROM, 8 MHz, MICROCONTROLLER, PDIP28 |
| ST62T94B8 | 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PDIP28 |
| ST62E85BG1 | 8-BIT, UVPROM, 8 MHz, MICROCONTROLLER, CQFP80 |
| ST62P35BQ3/XXX | 8-BIT, MROM, 4 MHz, MICROCONTROLLER, PQFP52 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| ST6246B-EMU2 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:REAL TIME EMULATION DEVELOPMENT TOOLS FOR ST6 MCU FAMILY |
| ST6246-P/QFP | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:REAL TIME EMULATION DEVELOPMENT TOOLS FOR ST6 MCU FAMILY |
| ST6-24B20 | 功能描述:電源變壓器 SPLIT BOBBIN HORZ MOUNT XFMR RoHS:否 制造商:Triad Magnetics 功率額定值:12 VA 初級電壓額定值:115 V / 230 V 次級電壓額定值:12 V / 24 V 安裝風(fēng)格:SMD/SMT 一次繞組:Dual Primary Winding 二次繞組:Dual Secondary Winding 長度:2.5 in 寬度:2 in 高度:1.062 in |
| ST624OB-EMU2 | 制造商:STMicroelectronics 功能描述:ST62 EMULATOR |
| ST624X | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:8/16-Bit Micros |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。