MEC1322 datasheet(239/456 Pages) MICROCHIP

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DS00001719D-page 239

MEC1322

19.11.13 REGISTER C

0 DAYLIGHT_SAVINGS_ENABLE

1=Enables automatic hardware updating of the hour, using the regis-

ters Daylight Savings Forward and Daylight Savings Backward to

select the yearly date and hour for each update

0=Automatic Daylight Savings updates disabled

R/W

RTC_R

Note:

The DATA_MODE and HOUR_FORMAT_24_12 bits affect only how values are presented as they are

being read and how they are interpreted as they are being written. They do not affect the internal contents

or interpretations of registers that have already been written, nor do they affect how those registers are

represented or counted internally. This mode bits may be set and cleared dynamically, for whatever I/O

data representation is desired by the host program.

Offset

0Ch

Bits

Description

Type

Default

Reset

Event

7 INTERRUPT_REQUEST_FLAG

1=Any of bits[6:4] below is active after masking by their respective

Enable bits in Register B.

0=No bits in this register are active

This bit is automatically cleared by every Read access to this register.

RTC_R

6 PERIODIC_INTERRUPT_FLAG

1=A Periodic Interrupt event has occurred since the last time this reg-

ister was read. This bit displays status regardless of the Periodic

Interrupt Enable bit in Register B

0=A Periodic Interrupt event has not occurred

This bit is automatically cleared by every Read access to this register.

RTC_R

5 ALARM_FLAG

1=An Alarm event has occurred since the last time this register was

read. This bit displays status regardless of the Alarm Interrupt

Enable bit in Register B.

0=An Alarm event has not occurred

This bit is automatically cleared by every Read access to this register.

RTC_R

Offset

0Bh

Bits

Description

Type

Default

Reset

Event

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