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參數(shù)資料
| 型號： | M41T81MQ6 |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
| 封裝： | PLASTIC, SOIC-16 |
| 文件頁數(shù)： | 9/28頁 |
| 文件大?。?/td> | 179K |
| 代理商： | M41T81MQ6 |
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M41T81
Setting Alarm Clock Registers
Address locations 0Ah-0Eh contain the alarm set-
tings. The alarm can be configured to go off at a
prescribed time on a specific month, date, hour,
minute, or second or repeat every year, month,
day, hour, minute, or second. It can also be pro-
grammed to go off while the M41T81 is in the bat-
tery back-up to serve as a system wake-up call.
Bits RPT5-RPT1 put the alarm in the repeat mode
of operation. Table 11, page 17 shows the possi-
ble configurations. Codes not listed in the table
default to the once per second mode to quickly
alert the user of an incorrect alarm setting.
When the clock information matches the alarm
clock settings based on the match criteria defined
by RPT5-RPT1, the AF (Alarm Flag) is set. If AFE
(Alarm Flag Enable) is also set, the alarm condi-
tion activates the IRQ/FT/OUT/SQW pin.
The
IRQ/FT/OUT/SQW output is cleared by a read to
the Flags register. This read of the Flags register
will also reset the Alarm Flag (D6; Register 0Fh).
The IRQ/FT/OUT/SQW pin can also be activated
in the battery back-up mode. The IRQ/FT/OUT/
SQW will go low if an alarm occurs and both ABE
(Alarm in Battery Back-up Mode Enable) and AFE
are set. The ABE and AFE bits are reset during
power-up, therefore an alarm generated during
power-up will only set AF. The user can read the
Flag Register at system boot-up to determine if an
alarm was generated while the M41T81 was in the
deselect mode during power-up. Figure 16, page
18 illustrates the back-up mode alarm timing.
Figure 15. Alarm Interrupt Reset Waveforms
Table 11. Alarm Repeat Modes
RPT5
RPT4
RPT3
RPT2
RPT1
Alarm Setting
1
Once per Second
1
0
Once per Minute
1
0
Once per Hour
1
0
Once per Day
1
0
Once per Month
0
Once per Year
IRQ/FT/OUT/SQW
ACTIVE FLAG
0Fh
0Eh
10h
HIGH-Z
AI04617
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| M41T94MQ6TR | 1 TIMER(S), REAL TIME CLOCK, PDSO16 |
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相關代理商/技術參數(shù) |
參數(shù)描述 |
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| M41T81MX | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS |
| M41T81MX6 | 功能描述:實時時鐘 Serial 512 (64x8) 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T81MX6TR | 功能描述:實時時鐘 Serial 512 (64x8) 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: 安裝風格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T81MY | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS |
| M41T81MY6 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial Access Real-Time Clock with Alarms |
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