SH7708 datasheet(341/633 Pages) RENESAS

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R64CNT is not initialized by a power-on reset or manual reset, or in standby mode.

Bit 7 always reads 0.

Bit:

Bit name:

—

1Hz

2Hz

4Hz

8Hz

16Hz

32Hz

64Hz

Initial value:

—

R/W:

12.2.2

Second Counter (RSECCNT)

The second counter (RSECCNT) is an 8-bit read/write register used for setting/counting in the

BCD-coded second section of the RTC. The count operation is performed by a carry for each

second of the 64 Hz counter.

The range that can be set is 00–59 (decimal). Errant operation will result if any other value is set.

Carry out write processing after halting the count operation with the START bit in RCR2, or

perform a write using the carry flag as shown in figure 12.2.

RSECCNT is not initialized by a power-on reset or manual reset, or in standby mode.

Bit:

Bit name:

—

10 seconds

1 second

Initial value:

—

R/W:

R/W

12.2.3

Minute Counter (RMINCNT)

The minute counter (RMINCNT) is an 8-bit read/write register used for setting/counting in the

BCD-coded minute section of the RTC. The count operation is performed by a carry for each

minute of the second counter.

The range that can be set is 00–59 (decimal). Errant operation will result if any other value is set.

Carry out write processing after halting the count operation with the START bit in RCR2, or

perform a write using the carry flag as shown in figure 12.2.

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