SH7261 datasheet(675/1348 Pages) RENESAS

675 / 1348 page

Section 15 Realtime Clock (RTC)

Rev. 2.00 Sep. 07, 2007 Page 643 of 1312

REJ09B0320-0200

15.3.2

Second Counter (RSECCNT)

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

performed by a carry for each second of the 64-Hz counter.

The assignable range is from 00 through 59 (practically in BCD), otherwise operation errors

occur. Carry out write processing after stopping the count operation through the setting of the

START bit in RCR2.

RSECCNT is not initialized by a power-on reset or manual reset, or in deep standby and software

standby modes.

R/W

Bit:

Initial value:

R/W:

—

———————

10 seconds

1 second

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

10 seconds

Undefined

R/W

Counting Ten's Position of Seconds

Counts on 0 to 5 for 60-seconds counting.

3 to 0

1 second

Undefined

R/W

Counting One's Position of Seconds

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

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

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