- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄45050 > M41T82SQA6F (STMICROELECTRONICS) 1 TIMER(S), REAL TIME CLOCK, QCC16 PDF資料下載
參數(shù)資料
| 型號： | M41T82SQA6F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時(shí)鐘/數(shù)據(jù)恢復(fù)及定時(shí)提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| 封裝： | 4 X 4 MM, ROHS COMPLIANT, QFN-16 |
| 文件頁數(shù)： | 31/58頁 |
| 文件大小： | 462K |
| 代理商： | M41T82SQA6F |
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頁當(dāng)前第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
M41T82 M41T83
Clock operation
3.7
Watchdog timer
The watchdog timer can be used to detect an out-of-control microprocessor. The user
programs the watchdog timer by setting the desired amount of time-out into the Watchdog
Register, address 09h. Bits BMB4-BMB0 store a binary multiplier and the two lower order
bits RB1-RB0 select the resolution, where 00 = 1/16 second, 01 = 1/4 second, 10 = 1
second, and 11 = 4 seconds. The amount of time-out is then determined to be the
multiplication of the five-bit multiplier value with the resolution. (For example: writing
00001110 in the Watchdog Register = 3*1, or 3 seconds). If the processor does not reset
the timer within the specified period, the M41T8x sets the WDF (Watchdog Flag) and
generates a watchdog interrupt.
The watchdog timer can be reset by having the microprocessor perform a WRITE of the
Watchdog Register. The time-out period then starts over.
Should the watchdog timer time-out, a value of 00h needs to be written to the Watchdog
Register in order to clear the IRQ1/FT/OUT pin. This will also disable the watchdog function
until it is again programmed correctly. A READ of the Flags Register will reset the Watchdog
Flag (bit D7; Register 0Fh).
The watchdog function is automatically disabled upon power-up and the Watchdog Register
is cleared. If the watchdog function is set, the frequency test function is activated, and the
SQWE bit is '0,' the watchdog function prevails and the frequency test function is denied.
Table 8.
Alarm repeat modes
RPT5
RPT4
RPT3
RPT2
RPT1
Alarm setting
11111
Once per second
11110
Once per minute
11100
Once per hour
11000
Once per day
10000
Once per month
00000
Once per year
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M41T83RM6F | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T83ZM6E | 1 TIMER(S), REAL TIME CLOCK, PDSO8 |
| M41T83ZQA6E | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| M41T83RMY6E | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| M41T83ZQA6F | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M41T82ZM6E | 功能描述:實(shí)時(shí)時(shí)鐘 Serial I2C bus RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T82ZM6F | 功能描述:實(shí)時(shí)時(shí)鐘 Serial I2C bus RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 總線接口:I2C 日期格式:DW:DM:M:Y 時(shí)間格式:HH:MM:SS RTC 存儲容量:64 B 電源電壓-最大:5.5 V 電源電壓-最小:1.8 V 最大工作溫度:+ 85 C 最小工作溫度: 安裝風(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T82ZMY6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T82ZMY6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T82ZQ6E | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。