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参数资料
| 型号： | M41T81SMY6T |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 时钟/数据恢复及定时提取 |
| 英文描述： | 1 TIMER(S), REAL TIME CLOCK, PDSO18 |
| 封装： | 0.300 INCH, LEAD FREE, PLASTIC, SOIC-18 |
| 文件页数： | 10/32页 |
| 文件大小： | 524K |
| 代理商： | M41T81SMY6T |
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Clock operation
M41T81S
Doc ID 10773 Rev 6
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 (and
SQWE is '0.'), the alarm condition activates the IRQ/FT/OUT/SQW pin.
Note:
If the address pointer is allowed to increment to the flags 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/FT/OUT/SQW 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.'
The IRQ/FT/OUT/SQW pin can also be activated in the battery backup mode. The
IRQ/FT/OUT/SQW will go low if an alarm occurs and both ABE (alarm in battery backup
mode enable) and AFE are set. Figure 14 illustrates the backup mode alarm timing.
Figure 13.
Alarm interrupt reset waveform
Figure 14.
Backup mode alarm waveform
IRQ/FT/OUT/SQW
ACTIVE FLAG
0Fh
0Eh
10h
HIGH-Z
AI04617
VCC
IRQ/FT/OUT/SQW
ABE and AFE Bits
AF Bit in Flags
Register
HIGH-Z
VSO
VPFD
trec
AI09164b
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相关代理商/技术参数 |
参数描述 |
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| M41T82 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial I2C bus RTC with battery switchover |
| M41T82_08 | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial I2C bus RTC with battery switchover |
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| M41T82RM6E | 功能描述:实时时钟 Serial I2C bus RTC W/ battry switchover RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
| M41T82RM6F | 功能描述:实时时钟 Serial I2C bus RTC RoHS:否 制造商:Microchip Technology 功能:Clock, Calendar. Alarm RTC 总线接口:I2C 日期格式:DW:DM:M:Y 时间格式:HH:MM:SS RTC 存储容量:64 B 电源电压-最大:5.5 V 电源电压-最小:1.8 V 最大工作温度:+ 85 C 最小工作温度: 安装风格:Through Hole 封装 / 箱体:PDIP-8 封装:Tube |
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