ACE5372

Low Power Real-Time Clock (RTC)

VER 1.2

9

Alarm-B day-of-the-week register (at internal address DH)

D7

D6

D5

D4

D3

D2

D1

D0

Operation

-

BW6

BW5

BW4

BW3

BW2

BW1

BW0

Write

0

BW6

BW5

BW4

BW3

BW2

BW1

BW0

Read

0

Undefined

Undefined

Undefined

Undefined

Undefined

Undefined

Undefined

Default

*Default means read value when XSTP bit is set to “1” by starting up from 0V, or supply voltage drop, etc.

The register D5 indicates 10 digit of hour digit in 24-hour display system.

* To activate alarm operation, any imaginary alarm time setting should not be left to avoid un-matching.

* In hour digit display midnight is et to “12”, noon is set to “32” in 12-hour display system.

* AW0 to AW6 (BW0 to BW6) correspond to the day-of-the-week counter being set at (0,0,0) to (1,1,0).

No alarm pulses are output when all of AW0 to AW6 (BW0 to BW6) are set to “0”

Example of Alarm Time Settings

Day-of-the-week

12-hour system

24-hour system

Alarm Time Settings

Sun

Mon

Tue

Wed

Thu

Fri

Sat

10H

1H

10M

1M

10H

1H

10M

1M

00:00AM

every day

1

1

1

1

1

1

1

1

2

0

0

0

0

0

0

05:27AM

every day

1

1

1

1

1

1

1

0

5

2

7

0

5

2

7

11:59AM

every day

1

1

1

1

1

1

1

1

1

5

9

1

1

5

9

00:00PM on

Mon thru Fri

0

1

1

1

1

1

0

3

2

0

0

1

2

0

0

05:56PM on

Wed

0

0

0

1

0

0

0

2

5

5

6

1

7

5

6

11:59PM on Tue, Thu, and Sat

0

0

1

0

1

0

1

3

1

5

9

2

3

5

9

6. CONTROL Register 1 ( at internal address EH )

D7

D6

D5

D4

D3

D2

D1

D0

Operation

AALE BALE SL2 SL1 TEST CT2 CT1 CT0

Write

AALE BALE SL2 SL1 TEST CT2 CT1 CT0

Read

0

0

0

0

0

0

0

0

Default

*The default means read value when XSTP bit is set to “1” by starting up from 0V, or supply voltage drop, etc.