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参数资料
| 型号： | M48T86MH1E |
| 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, PDSO28 |
| 封装： | 0.330 INCH, ROHS COMPLIANT, PLASTIC, SOH-28 |
| 文件页数： | 11/36页 |
| 文件大小： | 352K |
| 代理商： | M48T86MH1E |
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Obsolete
Product(s)
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Product(s)
M48T86
Clock operations
3.10
Register A
3.10.1
UIP update in progress
The Update in Progress (UIP) bit is a status flag that can be monitored. When the UIP bit is
'1,' the update transfer will soon occur (see Figure 9). When UIP is a '0,' the update transfer
will not occur for at least 244 s. The time, calendar, and alarm information in RAM is fully
available for access when the UIP bit is '0.' The UIP bit is “Read only” and is not affected by
RST. Writing the SET bit in Register B to a '1' inhibits any update transfer and clears the UIP
Status bit.
3.10.2
OSC0, OSC1, OSC2 oscillator control
These three bits are used to control the oscillator and reset the countdown chain. A pattern
of “010” enables operation by turning on the oscillator and enabling the divider chain. A
pattern of 11X turns the oscillator on, but keeps the frequency divider disabled. When “010”
is written, the first update begins after 500 ms.
3.10.3
RS3, RS2, RS1, RS0
These four rate-selection bits select one of the 13 taps on the 15-stage divider or disable the
divider output. The tap selected may be used to generate an output square wave (SQW pin)
and/or a periodic interrupt. The user may do one of the following:
1.
Enable the interrupt with the PIE bit;
or
2.
Enable the SQW output with the SQWE bit;
or
3.
Enable both at the same time and same rate;
or
4.
Enable neither.
Table 4 on page 18 lists the periodic interrupt rates and the square wave frequencies that
may be chosen with the RS bits. These four READ/WRITE bits are not affected by RST.
Table 5.
Register A MSB
Figure 9.
Update period timing and UIP
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
UIP
OSC2
OSC1
OSC0
RS3
RS2
RS1
RS0
AI01651
UIP
UPDATE PERIOD (1sec)
tBUC
tUC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| M48T86MH1F | 功能描述:实时时钟 5 Volt PC Drop-In 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 |
| M48T86MH1TR | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5.0 V PC real-time clock |
| M48T86PC | 制造商:STMICROELECTRONICS 制造商全称:STMicroelectronics 功能描述:5V PC REAL TIME CLOCK |
| M48T86PC1 | 功能描述:实时时钟 5 Volt PC Drop-In 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 |
| M48T86PC1 | 制造商:STMicroelectronics 功能描述:IC - Real Time Clock |
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