SH7713 datasheet(550/904 Pages) RENESAS

550 / 904 page

Section 15 Realtime Clock (RTC)

Rev.1.50 Aug. 30, 2006 Page 510 of 860

REJ09B0288-0150

The range of hour can be set is 0 to 23 (decimal). Errant operation will result if any other value is

set. Carry out write processing after stopping the count operation with the START bit in RCR2.

RHRCNT is an 8-bit readable/writable register and not initialized by a power-on reset or manual

reset, or in standby mode.

Bit

Bit Name

Initial Value

R/W

Description

7, 6



All 0

Reserved

These bits are always read as 0.The write value

should always be 0.

5, 4



R/W

Counter for 10-unit of hour in the BCD-code.

The range can be set from 0 to 2 (decimal).

3 to 0



R/W

Counter for 1-unit of hour in the BCD-code.

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

15.3.5

Day of Week Counter (RWKCNT)

RWKCNT is used for setting/counting day of week section. The count operation is performed by a

carry for each day of the date counter.

The range for day of the week can be set is 0 to 6 (decimal). Errant operation will result if any

other value is set. Carry out write processing after stopping the count operation with the START

bit in RCR2.

RWKCNT is an 8-bit readable/writable register and not initialized by a power-on reset or manual

reset, or in standby mode.

SH7713 Datasheet(PDF) 550 Page - Renesas Technology Corp