參數(shù)資料
型號(hào)： M41T66Q6F
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： REAL TIME CLOCK, QCC16
封裝： 3 X 3 MM, ROHS COMPLIANT, QFN-16
文件頁(yè)數(shù)： 10/33頁(yè)
文件大小： 336K
代理商： M41T66Q6F
Clock operation
M41T66
3.3
Setting alarm clock registers
Address locations 0Ah-0Eh contain the alarm settings. 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. Bits RPT5–RPT1 put the alarm in the repeat
mode of operation. Table 3 shows the possible 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 condition activates the IRQ/OUT. To disable the alarm, write '0' to the alarm date
register and to RPT5–RPT1.
Note:
If the address pointer is allowed to increment to the flag register address, an alarm condition
will not cause the interrupt/flag to occur until the address pointer is moved to a different
address. It should also be noted that if the last address written is the “alarm seconds,” the
address pointer will increment to the flag address, causing this situation to occur.
The IRQ/OUT output is cleared by a READ to the flags register as shown in Figure 13. A
subsequent READ of the flags register is necessary to see that the value of the alarm flag
has been reset to '0.'
Figure 13.
Alarm interrupt reset waveform
Table 3.
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
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M41T80 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS
M41T80_06 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Serial access Real Time Clock with alarm
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M41T80M 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS
M41T80M6 功能描述:實(shí)時(shí)時(shí)鐘 USE 511-M41T80M6E 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(chǔ)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
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