MCP79400 datasheet(22/62 Pages) MICROCHIP

22 / 62 page

MCP79400/MCP79401/MCP79402

DS20005009F-page 22

 2011-2016 Microchip Technology Inc.

ALMxHOUR: ALARM0/1 HOURS VALUE REGISTER (ADDRESSES 0x0C/0x13)

U-0

R-0

R/W-0

—

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

If 12/24 = 1 (12-hour format):

bit 7

Unimplemented:

Read as ‘0’

bit 6

12/24:

12 or 24 Hour Time Format bit(1)

= 12-hour format

= 24-hour format

bit 5

AM/PM:

AM/PM Indicator bit

= PM

= 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

Unimplemented:

Read as ‘0’

bit 6

12/24:

12 or 24 Hour Time Format bit(1)

= 12-hour format

= 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

Note 1:

This bit is read-only and reflects the value of the 12/24 bit in the RTCHOUR register.

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