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Registers, 1 wtcr: rtc control register, Registers 4.1 wtcr: rtc control register – FUJITSU MB91460 SERIES FR60 User Manual

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Chapter 49 Real-Time Clock

4.Registers

4. Registers

4.1 WTCR: RTC Control Register

This register is used to control behavior of the Real-time Clock module.

• WTCR: Address 04A2

H

(Access: Byte, Half-word)

(For attributes, refer to “

Meaning of Bit Attribute Symbols (Page No.10)

”.)

• bit15: Enable interrupt requests at 1-day intervals

When the hour counter overflows, this flag is set to “1”.

• bit14: 1-day interrupt request flag

• bit13: Enable interrupt requests at 1-hour intervals

When the minute counter overflows, this flag is set to “1”.

• bit12: 1-hour interrupt request flag

• bit11: Enable interrupt requests at 1-minute intervals

15

14

13

12

11

10

9

8

bit

INTE3

INT3

INTE2

INT2

INTE1

INT1

INTE0

INT0

0

0

0

0

0

0

0

0

Initial

value

0

0

0

0

0

0

0

0

When reset

R/W

R(R1),W

R/W

R(R1),W

R/W

R(R1),W

R/W

R(R1),W

Attribute

7

6

5

4

3

2

1

0

bit

Reserved

Reserved

Reserved

RUN

UPDT

ST

0

0

0

0

0

X

Initial

value

0

0

0

0

0

X

When reset

R/W0

R/W0

R/W0

RX/WX

R/WX

R(R0)/W

RX/WX

R/W

Attribute

INTE3

Operation

0

No interrupt requests

1

Generate interrupt requests at 1-day (24 hour) intervals.

INT3

Status

Read

Write

0

No interrupt requests

Clear the flag.

1

Generate interrupt requests at 1-day (24 hour)
intervals.

Writing does not affect the operation.

INTE2

Operation

0

No interrupt requests

1

Generate interrupt requests at 1-hour intervals.

INT2

Status

Read

Write

0

No interrupt requests

Clear the flag.

1

Generate interrupt requests at 1-hour intervals.

Writing does not affect the operation.

INTE1

Operation

0

No interrupt requests

1

Generate interrupt requests at 1-minute intervals.