Section 20 Realtime Clock (RTC)
Rev.1.00 Dec. 13, 2005 Page 724 of 1286
REJ09B0158-0100
Bit Bit
Name
Initial
Value R/W
Description
7
PEF
Undefined R/W
Periodic Interrupt Flag
Indicates interrupt generation at the interval specified
by bits PES2–PES0. When this flag is set to 1, a
periodic interrupt is generated.
0: Interrupt is not generated at interval specified by bits
PES2–PES0
[Clearing condition]
When 0 is written to PEF
1: Interrupt is generated at interval specified by bits
PES2–PES0
[Setting conditions]
Generation of interrupt at interval specified by bits
PES2–PES0
When 1 is written to PEF
6 to 4
PES[2:0]
All 0
R/W
Periodic Interrupt Enable
These bits specify the period for periodic interrupts.
000: No periodic interrupt generation
001: Periodic interrupt generated at 1/256-second
intervals
010: Periodic interrupt generated at 1/64-second
intervals
011: Periodic interrupt generated at 1/16-second
intervals
100: Periodic interrupt generated at 1/4-second
intervals
101: Periodic interrupt generated at 1/2-second
intervals
110: Periodic interrupt generated at 1-second intervals
111: Periodic interrupt generated at 2-second intervals
3 RTCEN
1
R/W
Oscillator
Enable
Controls the operation of the RTC's crystal oscillator.
0: RTC crystal oscillator is halted
1: RTC crystal oscillator is operated
Содержание SH7780 Series
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Страница 492: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Dec 13 2005 Page 442 of 1286 REJ09B0158 0100 ...
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Страница 726: ...Section 18 Timer Unit TMU Rev 1 00 Dec 13 2005 Page 676 of 1286 REJ09B0158 0100 ...
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Страница 1104: ...Section 27 NAND Flash Memory Controller FLCTL Rev 1 00 Dec 13 2005 Page 1054 of 1286 REJ09B0158 0100 ...
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