SH7721 datasheet(627/1524 Pages) RENESAS

Part #	SH7721

Description	Renesas 32-Bit RISC Microcomputer SuperHTM RISC engine Family / SH7700 Series

PDF	1524 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

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Section 17 Realtime Clock (RTC)

Rev. 3.00 Jan. 18, 2008 Page 565 of 1458

REJ09B0033-0300

17.3.3

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 00 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 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



Undefined

R/W

Counting Ten’s Position of Minutes

Counts on 0 to 5 for 60-minutes counting.

3 to 0



Undefined

R/W

Counting One’s Position of Minutes

Counts on 0 to 9 once per second. When a carry

is generated, 1 is added to the ten’s position.

SH7721 Datasheet(PDF) 627 Page - Renesas Technology Corp