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參數(shù)資料
| 型號： | M41T82ZM6E |
| 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, PDSO8 |
| 封裝： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件頁數(shù)： | 37/61頁 |
| 文件大?。?/td> | 983K |
| 代理商： | M41T82ZM6E |
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Clock operation
M41T82-M41T83
Doc ID 12578 Rev 12
The timer, oscillator fail detect circuit, alarm 1, and watchdog are ORed together as the
primary interrupt sources. The frequency test signal, FT, is used to enable a 512 Hz output
on the IRQ1/FT/OUT pin for calibrating the RTC. When not used as an interrupt or
frequency test output, the pin can be used as a discrete logic output controlled by the OUT
bit. The ABE bit is used to enable interrupts during backup mode.
Operating on VCC, all four interrupt sources are available. During backup, the timer and
watchdog are disabled, and the only interrupt sources are alarm 1 and the oscillator fail
detect circuit.
3.14.1
Active mode operation on VCC
When OUT is 0 and FT is 0, the pin will be 0 regardless of whether any interrupts are
enabled.
When FT is a 1, the 512 Hz signal will be output if OUT is 0 or if no interrupts are enabled.
The interrupt sources control the pin when OUT is 1 and one or more of the interrupts are
enabled.
If OUT is 1, FT is 0 and no interrupts are enabled, then the pin will be 1.
Table 15.
Priority for IRQ1/FT/OUT pin when operating on VCC
OUT(1)
FT(2)
A1IE(3)
+ OFIE(4)
+ TIE(5)
+ watchdog(6)
running
Pin
Comment
00
x
0
When OUT is 0 and FT is not enabled, OUT dominates
and none of the interrupt sources have any effect.
01
x
512 Hz
When FT = 1 and OUT = 1 and no interrupts are enabled,
the output will be the 512 Hz frequency test (FT) signal.
x1
0
1x
1
IRQ
When one or more interrupts are enabled, and OUT is a 1,
the pin stays high until one of the interrupts is asserted.
10
0
1
When OUT is 1, FT is 0 and no interrupts are enabled, the
pin is high.
1.
OUT is bit 7 of register 08h (digital calibration).
2.
FT is bit 6 of register 08h (digital calibration).
3.
A1IE is bit 7 of register 0Ah (alarm 1, month).
4.
OFIE is bit 7 of register 09h (watchdog).
5.
TIE is bit 5 of register 11h (timer control).
6.
The watchdog is controlled by register 09h (watchdog).
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 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 |
| M41T82ZQ6F | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial RTC with battery switchover |
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