Datasheet

 2010-2014 Microchip Technology Inc. DS20005010F-page 19
MCP7940N
TABLE 5-4: SUMMARY OF REGISTERS ASSOCIATED WITH TIMEKEEPING
REGISTER 5-6: RTCMTH: TIMEKEEPING MONTH VALUE REGISTER (ADDRESS 0x05)
U-0 U-0 R-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-1
— — LPYR 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 7-6 Unimplemented: Read as ‘0’
bit 5 LPYR: Leap Year bit
1 = Year is a leap year
0 = Year is not a leap year
bit 4 MTHTEN0: Binary-Coded Decimal Value of Month’s Tens 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
REGISTER 5-7: RTCYEAR: TIMEKEEPING YEAR VALUE REGISTER (ADDRESS 0x06)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-1
YRTEN3 YRTEN2 YRTEN1 YRTEN0 YRONE3 YRONE2 YRONE1 YRONE0
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 7-4 YRTEN<3:0>: Binary-Coded Decimal Value of Year’s Tens Digit
Contains a value from 0 to 9
bit 3-0 YRONE<3:0>: Binary-Coded Decimal Value of Year’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
RTCSEC
ST SECTEN2 SECTEN1 SECTEN0 SECONE3 SECONE2 SECONE1 SECONE0 16
RTCMIN
— MINTEN2 MINTEN1 MINTEN0 MINONE3 MINONE2 MINONE1 MINONE0 17
RTCHOUR
— 12/24 AM/PM
HRTEN1
HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0 17
RTCWKDAY
— — OSCRUN PWRFAIL VBAT EN WKDAY2 WKDAY1 WKDAY0 18
RTCDATE
— — DATETEN1 DATETEN0 DATEONE3 DATEONE2 DATEONE1 DATEONE0 18
RTCMTH
— — LPYR MTHTEN0 MTHONE3 MTHONE2 MTHONE1 MTHONE0 19
RTCYEAR YRTEN3 YRTEN2 YRTEN1 YRTEN0 YRONE3 YRONE2 YRONE1 YRONE0 19
Legend: — = unimplemented location, read as ‘0’. Shaded cells are not used in timekeeping.