SH7713 datasheet(558/904 Pages) RENESAS

558 / 904 page

Section 15 Realtime Clock (RTC)

Rev.1.50 Aug. 30, 2006 Page 518 of 860

REJ09B0288-0150

Bit

Bit Name

Initial Value

R/W

Description

ENB

R/W

Date Alarm Enable

Specifies whether comparison of RDAYCNT and

RDAYAR is performed as an alarm condition.

0: Not compared

1: Compared



Reserved

This bit is always read as 0. The write value

should always be 0.

5, 4



R/W

Setting value for 10-unit of date alarm in the

BCD-code.

The range can be set from 0 to 3 (decimal).

3 to 0



R/W

Setting value for 1-unit of date alarm in the BCD-

code.

The range can be set from 0 to 9 (decimal).

15.3.14

Month Alarm Register (RMONAR)

RMONAR is an alarm register corresponding to the month counter RMONCNT. When the ENB

bit is set to 1, a comparison with the RMONCNT value is performed. From among

RSECAR/RMINAR/RHRAR/RWKAR/RDAYAR/ and RMONAR, the counter and alarm register

comparison is performed only on those with ENB bits and the YAEN bit in RCR3 set to 1, and if

each of those coincide, an RTC alarm interrupt is generated.

The range of month alarm which can be set is 1 to 12 (decimal). Errant operation will result if any

other value is set.

RMONAR is an 8-bit readable/writable register. The ENB bit in RMONAR is initialized by a

power-on reset. The remaining RMONAR fields are not initialized by a power-on reset or manual

reset, or in standby mode.

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