PC87591L datasheet(365/437 Pages) NSC

365 / 437 page

Host-Controlled Modules and Host Interface (Continued)

Revision 1.07

365

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Seconds Alarm Register (SECA)

Location: Index 0116

Type: R/W

Minutes Register (MIN)

Location: Index 0216

Type: R/W

Minutes Alarm Register (MINA)

Location: Index 0316

Type: R/W

Hours Register (HOR)

Location: Index 0416

Type: R/W

Bit

76543210

Name

Seconds Alarm Data

Reset

00000000

Bit

Description

7-0

Seconds Alarm Data. Values may be 00 to 59 in BCD format or 00 to 3B in binary format.

When bits 7 and 6 are both set to one (“11”), unconditional match is selected.

Bit

76543210

Name

Minutes Data

Reset

00000000

Bit

Description

7-0

Minutes Data. Values may be 00 to 59 in BCD format or 00 to 3B in binary format.

Bit

76543210

Name

Minutes Alarm Data

Reset

00000000

Bit

Description

7-0

Minutes Alarm Data. Values may be 00 to 59 in BCD format or 00 to 3B in binary format.

When bits 7 and 6 are both set to one (“11”), unconditional match is selected.

Bit

76543210

Name

Hours Data

Reset

00000000

Bit

Description

7-0

Hours Data. For 12-hour mode, values may be 01 to 12 (a.m.) and 81 to 92 (p.m.) in BCD format or 01 to 0C

(a.m.) and 81 to 8C (p.m.) in binary format. For 24-hour mode, values may be 00 to 23 in BCD format or 00 to

17 in binary format.

PC87591L Datasheet(PDF) 365 Page - National Semiconductor (TI)

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