参数资料
型号: MCP79412-I/MS
元件分类: 时钟/数据恢复及定时提取
英文描述: REAL TIME CLOCK, PDSO8
封装: ROHS COMPLAINT, PLASTIC, MSOP-8
文件页数: 9/40页
文件大小: 584K
代理商: MCP79412-I/MS
2010-2011 Microchip Technology Inc.
DS22266C-page 17
MCP7941X
4.2.7
POWER-FAIL TIME-STAMP
The MCP7941X family of RTCC devices feature a
power-fail time-stamp feature. This feature will store
the time at which VCC crosses the VTRIP voltage and is
shown in Figure 4-4. To use this feature, a VBAT
supply must be present and the oscillator must also be
running.
There are two separate sets of registers that are used
to record this information:
The first set, located at 0x18h through 0x1Bh, is
loaded at the time when VCC falls below VTRIP
and the RTCC operates on the VBAT. The VBAT
(register 0x03h bit 4) bit is also set at this time.
The second set of registers, located at 0x1Ch
through 0x1Fh, is loaded at the time when VCC is
restored and the RTCC switches to VCC.
The power-fail time-stamp registers are cleared when
the VBAT bit is cleared in software.
FIGURE 4-4:
POWER-FAIL GRAPH
VCC
VTRIP(max)
VTRIP(min)
V
CCF
T
V
CCRT
Power-Down
Power-Up
Time Stamp
相关PDF资料
PDF描述
MCP79410-I/MNY REAL TIME CLOCK, PDSO8
MCP79410T-I/ST REAL TIME CLOCK, PDSO8
MCP79412-I/MNY REAL TIME CLOCK, PDSO8
MCP79411T-I/MS REAL TIME CLOCK, PDSO8
MCP79411-I/ST REAL TIME CLOCK, PDSO8
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MCP79412T-I/MNY 功能描述:实时时钟 I2C GP RTCC 1Kb EE 64B SRAM EUI-64 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
MCP79412T-I/MS 功能描述:实时时钟 I2C GP RTCC 1Kb EE 64B SRAM EUI-64 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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MCP79510 制造商:MAS 制造商全称:MAS 功能描述:3V SPI Real-Time Clock Calendar with Battery Switchover