SH7713 datasheet(552/904 Pages) RENESAS

552 / 904 page

Section 15 Realtime Clock (RTC)

Rev.1.50 Aug. 30, 2006 Page 512 of 860

REJ09B0288-0150

15.3.6

Date Counter (RDAYCNT)

RDAYCNT is used for setting/counting in the BCD-coded date section. The count operation is

performed by a carry for each day of the hour counter.

Though the range of date which can be set is 1 to 31 (decimal), it changes with each month and in

leap years. Please confirm the correct setting. 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.

RDAYCNT 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 date in the BCD-code.

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

3 to 0



R/W

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

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

15.3.7

Month Counter (RMONCNT)

RMONCNT is used for setting/counting in the BCD-coded month section. The count operation is

performed by a carry for each month of the date counter.

The range of month can be set is 1 to 12 (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.

RMONCNT 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) 552 Page - Renesas Technology Corp