• 9 •

November

1

0

001

December

1

0

010

Table 18 Years register bits description

08H

Symbol

Description

b7..0

<years>

This register represents the current year value coded in BCD format; value

=00 to 99.

2.7.5 Alarm registers

When one or more of the alarm registers are loaded with a valid minute, hour, day or

weekday and its corresponding

———

AE(Alarm Enable) bit is a logic 0, then that information will be

compared with the current minute, hour, day and weekday. When all enabled comparisons first

match, the bit AF (Alarm Flag) is set.

AF will remain set until cleared by software. Once AF has been cleared it will only be set

again when the time increments to match the alarm condition once more. Alarm registers

whichhavetheir

———

AE bit set at logic 1 will be ignored.

Table 19 Minute alarm register bits description

09H

Symbol

Description

b7

———

AE

———

AE= 0; minute alarm is enabled.

———

AE= 1; minute alarm is disabled.

b6..0

<minute alarm>

These bits represents the minute alarm information coded in BCD

format; value = 00 to 59.

Table 20 Hour alarm register bits description

0AH

Symbol

Description

7

———

AE

———

AE= 0; hour alarm is enabled.

———

AE= 1; hour alarm is disabled.

6to

0

<hour alarm>

These bits represents the hour alarm information coded in BCD

format; value = 00 to 23.

Table 21: Day alarm register bits description

0BH

Symbol

Description

b7

———

AE

———

AE= 0; day alarm is enabled.

———

AE= 1; day alarm is disabled.

b6..0

<day alarm>

These bits represents the day alarm information coded in BCD

format; value = 01 to 31.

Table 22 Weekday alarm register bits description

0CH

Symbol

Description

HM8563