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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： | 15/36页 |
| 文件大小： | 352K |
| 代理商： | M48T86MH1E |
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Obsolete
Product(s)
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Product(s)
Clock operations
M48T86
3.12.2
PF: periodic interrupt flag
The Periodic Interrupt Flag (PF) is a “Read only” bit which is set to a '1' when an edge is
detected on the selected tap of the divider chain. The RS3-RS0 bits establish the periodic
rate. PF is set to a '1' independent of the state of the PIE Bit. The IRQ signal is active and
will set the IRQF bit. The PF bit is cleared by a RST or a software READ of Register C.
3.12.3
AF: alarm flag
A '1' in the AF (Alarm Interrupt Flag) bit indicates that the current time has matched the
alarm time. If the AIE bit is also a '1,' the IRQ pin will go low and a '1' will appear in the IRQF
Bit. A RST or a READ of Register C will clear AF.
3.12.4
UF: update ended interrupt flag
The Update Ended Interrupt Flag (UF) bit is set after each update cycle. When the UIE bit is
set to a '1,' the '1' in the UF bit causes the IRQF bit to be a '1.' This will assert the IRQ pin.
UF is cleared by reading Register C or a RST.
3.12.5
BIT 0 through 3: unused bits
Bit 3 through Bit 0 are unused. These bits always read '0' and cannot be written.
3.13
Register D
3.13.1
VRT: valid RAM and time
The Valid RAM and Time (VRT) bit is set to the '1' state by STMicroelectronics prior to
shipment. This bit is not writable and should always be a '1' when read. If a '0' is ever
present, an exhausted internal lithium cell is indicated and both the contents of the RTC
data and RAM data are questionable. This bit is unaffected by RST.
3.13.2
BIT 0 through 6: unused bits
The remaining bits of Register D are not usable. They cannot be written and when read,
they will always read '0.'
Table 7.
Register C MSB
Table 8.
Register D MSB
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
IRQF
PF
AF
UF
0000
BIT7
BIT6
BIT5
BIT4
BIT3
BIT2
BIT1
BIT0
VRT
0000000
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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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