RV5C387A

PRELIMINARY

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13.2.

Register Settings

13.2.1.

Control Register 1 (ADDRESS Eh)

D7

D6

D5

D4

D3

D2

D1

D0

WALE

DALE

/12

⋅24

/CLEN2

TEST

CT2

CT1

CT0

(For Writing)

WALE

DALE

/12

⋅24

/CLEN2

TEST

CT2

CT1

CT0

(For Reading)

0

0

0

0

0

0

0

0

Default Settings *)

*)

Default settings:

Default value means read/written values when the XSTP bit is set to “1” due to power-on

from 0 volts or supply voltage drop.

(1)

WALE, DALE

Alarm_W Enable Bit, Alarm_D Enable Bit

WALE,DALE

Description

0

Disabling the alarm interrupt circuit (under the control of the settings

of the Alarm_W registers and the Alarm_D registers).

(Default)

1

Enabling the alarm interrupt circuit (under the control of the settings

of the Alarm_W registers and the Alarm_D registers)

(2)

/12

⋅24

12-/24-hour Mode Selection Bit

/12

⋅24

Description

0

Selecting the 12-hour mode with a.m. and p.m. indications.

(Default)

1

Selecting the 24-hour mode

Setting the /12

24-hour mode

12-hour mode

24-hour mode

12-hour mode

00

12 (AM12)

12

32 (PM12)

01

01 (AM 1)

13

21 (PM 1)

02

02 (AM 2)

14

22 (PM 2)

03

03 (AM 3)

15

23 (PM 3)

04

04 (AM 4)

16

24 (PM 4)

05

05 (AM 5)

17

25 (PM 5)

06

06 (AM 6)

18

26 (PM 6)

07

07 (AM 7)

19

27 (PM 7)

08

08 (AM 8)

20

28 (PM 8)

09

09 (AM 9)

21

29 (PM 9)

10

10 (AM10)

22

30 (PM10)

11

11 (AM11)

23

31 (PM11)

Setting the /12

⋅24 bit should precede writing time data

(3) /CLEN2

32-kHz Clock Output Bit 2

/CLEN2

Description

0

Enabling the 32-kHz clock circuit

(Default)

1

Disabling the 32-kHz clock circuit

Setting the /CLEN2 bit or the /CLEN1 bit (D3 in the control register 2) to 0 specifies generating clock pulses with

the oscillation frequency of the 32.768-kHz crystal oscillator for output from the 32KOUT pin.

Conversely,

setting both the /CELN1 and the /CLEN2 bit to 1 specifies disabling (“H”) such output.

(4) TEST

Test Bit

TEST

Description

0

Normal operation mode.

(Default)

1

Test mode.

The TEST bit is used only for testing in the factory and should normally be set to 0.