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MCP7940N-E/MS Datasheet(PDF) 34 Page - Microchip Technology |
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MCP7940N-E/MS Datasheet(HTML) 34 Page - Microchip Technology |
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34 / 58 page  MCP7940N DS20005010J-page 34 2011-2022 Microchip Technology Inc. and its subsidiares TABLE 5-13: SUMMARY OF REGISTERS ASSOCIATED WITH BATTERY BACKUP REGISTER 5-18: PWRxxDATE: POWER-DOWN/POWER-UP TIME-STAMP DATE VALUE REGISTER (ADDRESSES 0x1A/0x1E) U-0 U-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 — — DATETEN1 DATETEN0 DATEONE3 DATEONE2 DATEONE1 DATEONE0 bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is clear x = Bit is unknown bit 7-6 Unimplemented: Read as ‘0’ bit 5-4 DATETEN<1:0>: Binary-Coded Decimal Value of Date’s Tens Digit Contains a value from 0 to 3 bit 3-0 DATEONE<3:0>: Binary-Coded Decimal Value of Date’s Ones Digit Contains a value from 0 to 9 REGISTER 5-19: PWRxxMTH: POWER-DOWN/POWER-UP TIME-STAMP MONTH VALUE REGISTER (ADDRESSES 0x1B/0x1F) R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 WKDAY2 WKDAY1 WKDAY0 MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0 bit 7 bit 0 Legend: R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’ -n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is clear x = Bit is unknown bit 7-5 WKDAY<2:0>: Binary-Coded Decimal Value of Day bits Contains a value from 1 to 7. The representation is user-defined. bit 4 MTHTEN0: Binary-Coded Decimal Value of Month’s Ones Digit Contains a value of 0 or 1 bit 3-0 MTHONE<3:0>: Binary-Coded Decimal Value of Month’s Ones Digit Contains a value from 0 to 9 Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 Register on Page RTCWKDAY — — OSCRUN PWRFAIL VBATEN WKDAY2 WKDAY1 WKDAY0 18 PWRDNMIN — MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0 33 PWRDNHOUR — 12/24 AM/PM HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0 33 PWRDNDATE — — DATETEN1 DATETEN0 DATEONE3 DATEONE2 DATEONE1 DATEONE0 34 PWRDNMTH WKDAY2 WKDAY1 WKDAY0 MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0 34 PWRUPMIN — MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0 33 PWRUPHOUR — 12/24 AM/PM HRTEN1 HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0 33 PWRUPDATE — — DATETEN1 DATETEN0 DATEONE3 DATEONE2 DATEONE1 DATEONE0 34 PWRUPMTH WKDAY2 WKDAY1 WKDAY0 MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0 34 Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used with battery backup. |
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