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MCP79510 参数 Datasheet PDF下载

MCP79510图片预览
型号: MCP79510
PDF下载: 下载PDF文件 查看货源
内容描述: 与电池切换3V SPI实时时钟日历 [3V SPI Real-Time Clock Calendar with Battery Switchover]
分类和应用: 电池时钟
文件页数/大小: 50 页 / 946 K
品牌: MAS [ MICRO ANALOG SYSTEMS ]
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MCP7952X/MCP7951X  
REGISTER 5-4:  
HOUR 0X03  
R/W  
R/W  
12/24  
R/W  
R/W  
R/W  
CALSGN  
10 Hour  
AM/PM  
10 Hour  
Hour  
bit 7  
bit 6  
bit 5  
bit 4  
bit 3  
bit 0  
Legend:  
R = Readable bit  
W = Writable bit  
U = Unimplemented bit, read as ‘0’  
bit 7  
CALSGN: Calibration Sign bit  
Bit 7 is the sign bit (CALSGN) for the calibration. Clearing this bit produces a positive calibration,  
setting this bit produces a negative calibration.  
bit 6  
12/24: Clearing this bit to ‘0’ enables 24-hour format, setting this bit to ‘1’ enables 12-hour format.  
bit 5  
10 HOUR: AM/PM bit for 12-hour time  
10 HOUR  
bit 4  
bit 3-0  
HOUR<3:0>  
Note 1: Contains the BCD hour in bits <3:0>. Bits <5:4> contain either the 10-hour in BCD for 24-hour format or  
the AM/PM indicator and the 10-hour bit for 12-hour format. Bit 5 determines the hour format.  
REGISTER 5-5:  
DAY 0X04  
U-0  
U-0  
R
R/W  
R/W  
R/W  
Day  
OSCON  
VBAT  
VBATEN  
bit 7  
bit 6  
bit 5  
bit 4  
bit 3  
bit 2  
bit 0  
Legend:  
R = Readable bit  
W = Writable bit  
U = Unimplemented bit, read as ‘0’  
bit 7-6  
bit 5  
Unimplemented: Read as ‘0’  
OSCON: Oscillator On bit  
This bit is set and cleared by hardware. If this bit is set, the oscillator is running; if  
clear, the oscillator is not running. This bit does not indicate that the oscillator is running at the correct  
frequency. The bit will wait 32 oscillator cycles before the bit is set.  
bit 4  
VBAT: External Battery Switched Flag bit  
This bit is set by hardware when the VCC fails and the VBAT is used to power the oscillator and the  
RTCC registers. This bit is cleared by software.  
bit 3  
VBATEN: External Battery Enable bit  
If this bit is set the internal circuitry is connected to the VBAT pin. If this bit is ‘0’ then the VBAT pin is  
disconnected and the only current drain on the external battery is the VBAT pin leakage.  
DAY<2:0>  
bit 2-0  
Note 1: Contains the BCD day. The range is 1-7. Also, additional bits are used for configuration and status.  
2012 Microchip Technology Inc.  
Preliminary  
DS22300A-page 13