SH7261 datasheet(690/1348 Pages) RENESAS

690 / 1348 page

Section 15 Realtime Clock (RTC)

Rev. 2.00 Sep. 07, 2007 Page 658 of 1312

REJ09B0320-0200

Bit

Bit Name

Initial

Value

R/W

Description

CIE

R/W

Carry Interrupt Enable Flag

When the carry flag (CF) is set to 1, the CIE bit enables

interrupts.

0: A carry interrupt is not generated when the CF flag is

set to 1

1: A carry interrupt is generated when the CF flag is set

to 1

AIE

R/W

Alarm Interrupt Enable Flag

When the alarm flag (AF) is set to 1, the AIE bit allows

interrupts.

0: An alarm interrupt is not generated when the AF flag

is set to 1

1: An alarm interrupt is generated when the AF flag is

set to 1

2, 1

—

All 0

Reserved

These bits are always read as 0. The write value should

always be 0.

R/W

Alarm Flag

The AF flag is set when the alarm time, which is set by

an alarm register (ENB bit in RSECAR, RMINAR,

RHRAR, RWKAR, RDAYAR, RMONAR, or RYRAR is

set to 1), and counter match.

0: Alarm register and counter not match

[Clearing condition]

• When 0 is written to AF.

1: Alarm register and counter match*

[Setting condition]

• When alarm register (only a register with ENB bit

set to 1) and counter match

Note:

Writing 1 holds previous value.

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