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參數(shù)資料
| 型號： | M41T65Q6F |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 時鐘/數(shù)據(jù)恢復(fù)及定時提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, QCC16 |
| 封裝： | 3 X 3 MM, LEAD FREE, QFN-16 |
| 文件頁數(shù)： | 18/40頁 |
| 文件大小： | 707K |
| 代理商： | M41T65Q6F |
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M41T62/63/64/65
Clock operation
Doc ID 10397 Rev 12
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 7 on page 25 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
(M41T62/65), the alarm condition activates the IRQ/OUT or IRQ/FT/OUT pin. 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 output is cleared by a READ to the flags register as shown in
page 25. A subsequent READ of the flags register is necessary to see that the value of the
alarm flag has been reset to '0.'
Figure 22. Alarm interrupt reset waveform
Table 7.
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
ALARM FLAG BIT (AF)
0Fh
0Eh
00h
HIGH-Z
AI08898
IRQ/OUT or
IRQ/FT/OUT
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| M41T65Q6F-CUT TAPE | 制造商:ST 功能描述:M41T65 Series 1.3 to 4.4 V Serial I2C Real Time Clock Surface Mount - QFN-16 |
| M41T66 | 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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| M41T66Q6F | 功能描述:實時時鐘 real-time clock with alarms 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(fēng)格:Through Hole 封裝 / 箱體:PDIP-8 封裝:Tube |
| M41T80 | 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:SERIAL ACCESS RTC WITH ALARMS |
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