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HD6417751 Datasheet, PDF (318/1105 Pages) Renesas Technology Corp – SuperH RISC engine | |||
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Bit 7âPeriodic Interrupt Flag (PEF): Indicates interrupt generation at the interval specified by
bits PES2âPES0. When this flag is set to 1, a periodic interrupt is generated.
Bit 7: PEF
0
1
Description
Interrupt is not generated at interval specified by bits PES2âPES0
[Clearing condition]
When 0 is written to PEF
Interrupt is generated at interval specified by bits PES2âPES0
[Setting conditions]
⢠Generation of interrupt at interval specified by bits PES2âPES0
⢠When 1 is written to PEF
Bits 6 to 4âPeriodic Interrupt Enable (PES2âPES0): These bits specify the period for periodic
interrupts.
Bit 6: PES2
0
1
Bit 5: PES1
0
1
0
1
Bit 4: PES0
0
1
0
1
0
1
0
1
Description
No periodic interrupt generation
(Initial value)
Periodic interrupt generated at 1/256-second intervals
Periodic interrupt generated at 1/64-second intervals
Periodic interrupt generated at 1/16-second intervals
Periodic interrupt generated at 1/4-second intervals
Periodic interrupt generated at 1/2-second intervals
Periodic interrupt generated at 1-second intervals
Periodic interrupt generated at 2-second intervals
Bit 3âOscillator Enable (RTCEN): Controls the operation of the RTCâs crystal oscillator.
Bit 3: RTCEN
0
1
Description
RTC crystal oscillator is halted
RTC crystal oscillator is operated
(Initial value)
Rev. 3.0, 04/02, page 278 of 1064
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