Microchip Technology MA180025 数据表

 2010 Microchip Technology Inc.

DS39933D-page 163

PIC18F87J90 FAMILY

15.1.3

ALRMVALH AND ALRMVALL
REGISTER MAPPINGS

REGISTER 15-14: ALRMMNTH: ALARM MONTH VALUE REGISTER

(1)

U-0

R/W-x

—

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 cleared

x = Bit is unknown

bit 7-5

Unimplemented: Read as ‘0’

bit 4

MTHTEN0: Binary Coded Decimal Value of Month’s Tens Digit bit
Contains a value of 0 or 1.

bit 3-0

MTHONE<3:0>: Binary Coded Decimal Value of Month’s Ones Digit bits
Contains a value from 0 to 9.

Note 1:

A write to this register is only allowed when RTCWREN = 1.

REGISTER 15-15: ALRMDAY: ALARM DAY VALUE REGISTER

(1)

U-0

R/W-x

—

DAYTEN1

DAYTEN0

DAYONE3

DAYONE2

DAYONE1

DAYONE0

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 cleared

x = Bit is unknown

bit 7-6

Unimplemented: Read as ‘0’

bit 5-4

DAYTEN<1:0>: Binary Coded Decimal Value of Day’s Tens Digit bits
Contains a value from 0 to 3.

bit 3-0

DAYONE<3:0>: Binary Coded Decimal Value of Day’s Ones Digit bits
Contains a value from 0 to 9.

Note 1:

A write to this register is only allowed when RTCWREN = 1.

REGISTER 15-16: ALRMWD: ALARM WEEKDAY VALUE REGISTER

(1)

U-0

R/W-x

—

WDAY2

WDAY1

WDAY0

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 cleared

x = Bit is unknown

bit 7-3

Unimplemented: Read as ‘0’

bit 2-0

WDAY<2:0>: Binary Coded Decimal Value of Weekday Digit bits
Contains a value from 0 to 6.

Note 1:

A write to this register is only allowed when RTCWREN = 1.