Renesas SH7709S Manual Do Utilizador

Rev. 5.00, 09/03, page 422 of 760

Start Bit (START): Halts and restarts the counter (clock).

0

Second/minute/hour/day/week/month/year counter halts

1

Second/minute/hour/day/week/month/year counter runs normally

(Initial value)

Note:

The 64-Hz counter always runs unless stopped with the RTCEN bit.

All the registers should be set after the power is turned on.

Figure 13.2 shows how to set the time when the clock is stopped. This works when the entire
calendar or clock is to be set. Programming can be easily performed.

Write 1 to RESET and 0 to
START in the RCR2 register

Order is irrelevant

Write 1 to START in the
RCR2 register

Set seconds, minutes,

hour, day, day of the

week, month and year

Stop clock,

reset divider circuit

To reset the divider circuit (RTC prescaler
and R64CNT) and set the counter

Start clock