Datasheet

 2012-2018 Microchip Technology Inc. DS20002300C-page 18
MCP7951X/MCP7952X
REGISTER 5-4: RTCHOUR: TIMEKEEPING HOURS VALUE REGISTER (ADDRESS 0x03)
R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0 R/W-0
TRIMSIGN 12/24
AM/PM
HRTEN1
HRTEN0 HRONE3 HRONE2 HRONE1 HRONE0
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
I
f 12/24 = 1 (12-hour format):
bit 7 TRIMSIGN: Trim Sign bit
1 = Add clocks to correct for slow time
0 = Subtract clocks to correct for fast time
bit 6 12/24
: 12 or 24 Hour Time Format bit
1 = 12-hour format
0 = 24-hour format
bit 5 AM
/PM: AM/PM Indicator bit
1 = PM
0 = AM
bit 4 HRTEN0: Binary-Coded Decimal Value of Hour’s Tens Digit
Contains a value from 0 to 1
bit 3-0 HRONE<3:0>: Binary-Coded Decimal Value of Hour’s Ones Digit
Contains a value from 0 to 9
If 12/
24 = 0 (24-hour format):
bit 7 TRIMSIGN: Trim Sign bit
1 = Add clocks to correct for slow time
0 = Subtract clocks to correct for fast time
bit 6 12/24
: 12 or 24 Hour Time Format bit
1 = 12-hour format
0 = 24-hour format
bit 5-4 HRTEN<1:0>: Binary-Coded Decimal Value of Hour’s Tens Digit
Contains a value from 0 to 2.
bit 3-0 HRONE<3:0>: Binary-Coded Decimal Value of Hour’s Ones Digit
Contains a value from 0 to 9