426
Bit 0
—
Start Bit (START): Halts and restarts the counter (clock).
Bit 0: START
Description
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.
13.3
RTC Operation
13.3.1
Initial Settings of Registers after Power-On
All the registers should be set after the power is turned on.
13.3.2
Setting the Time
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
Figure 13.2 Setting the Time
Содержание SH7709S
Страница 2: ...Hitachi SuperH RISC engine SH7709S Hardware Manual ADE 602 250 Rev 1 0 09 21 01 Hitachi Ltd ...
Страница 75: ...56 ...
Страница 107: ...88 ...
Страница 125: ...106 ...
Страница 139: ...120 ...
Страница 203: ...184 ...
Страница 245: ...226 ...
Страница 292: ...273 T1 CKIO A25 to A0 CSn RD WR RD D31 to D0 WEn D31 to D0 BS T2 Read Write Figure 10 6 Basic Timing of Basic Interface ...
Страница 323: ...304 Tp TRr TRrw TRrw CKIO CKE CSn RAS3U RAS3L CASU CASL RD WR Figure 10 28 Synchronous DRAM Auto Refresh Timing ...
Страница 411: ...392 ...
Страница 609: ...590 ...
Страница 635: ...616 ...
Страница 663: ...644 ...
Страница 679: ...660 ...