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参数资料
| 型号： | M41T83ZM6F |
| 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, PDSO8 |
| 封装： | 0.150 INCH, ROHS COMPLIANT, PLASTIC, SOP-8 |
| 文件页数： | 18/61页 |
| 文件大小： | 983K |
| 代理商： | M41T83ZM6F |
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M41T82-M41T83
Clock operation
Doc ID 12578 Rev 12
3.3
Real-time clock accuracy
The M41T8x is driven by a quartz controlled oscillator with a nominal frequency of
32,768 Hz. The accuracy of the real-time clock is dependent upon the accuracy of the
crystal, and the match between the capacitive load of the oscillator circuit and the capacitive
load for which the crystal was trimmed. Temperature also affects the crystal frequency,
causing additional error (see Figure 17 on page 30).
The M41T8x provides the option of clock correction through either manufacturing calibration
or in-application calibration. The total possible compensation is typically –93 ppm to +156
ppm. The two compensation circuits that are available are:
1.
An analog calibration register (12h) can be used to adjust internal (on-chip) load
capacitors for oscillator capacitance trimming. The individual load capacitors CXI and
0.25 pF. This translates to a calculated compensation of approximately ±30 ppm (see
2.
A digital calibration register (08h) can also be used to adjust the clock counter by
adding or subtracting a pulse at the 512 Hz divider stage. This approach provides
periodic compensation of approximately –63 ppm to +126 ppm (see Section 3.4.1:
Figure 16.
Internal load capacitance adjustment
AI11804
XO
XI
Crystal Oscillator
CXI
CXO
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相关代理商/技术参数 |
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| M41T83ZMY6E | 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 |
| M41T83ZMY6F | 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 |
| M41T83ZQ6E | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T83ZQ6F | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:Serial RTC with battery switchover |
| M41T83ZQA6E | 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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