SH7713 datasheet(549/904 Pages) RENESAS

549 / 904 page

Section 15 Realtime Clock (RTC)

Rev.1.50 Aug. 30, 2006 Page 509 of 860

REJ09B0288-0150

RSECCNT 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



Reserved

This bit is always read as 0. The write value

should always be 0.

6 to 4



R/W

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

The range can be set from 0 to 5 (decimal).

3 to 0



R/W

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

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

15.3.3

Minute Counter (RMINCNT)

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

performed by a carry for each minute of the second counter.

The range of minute can be set is 0 to 59 (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.

RMINCNT 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



Reserved

This bit is always read as 0.The write value

should always be 0.

6 to 4



R/W

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

The range can be set from 0 to 5 (decimal).

3 to 0



R/W

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

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

15.3.4

Hour Counter (RHRCNT)

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

performed by a carry for each 1 hour of the minute counter.

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