SH7708 datasheet(349/633 Pages) RENESAS

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Bit 7—Carry Flag (CF): Status flag that indicates that a carry has occurred. CF is set to 1 when a

count-up to R64CNT or RSECCNT occurs. A count register value read at this time cannot be

guaranteed; another read is required.

Bit 7: CF

Description

No count up of R64CNT or RSECCNT.

Clearing condition: When 0 is written to CF

(Initial value)

Count up of R64CNT or RSECCNT.

Setting condition: When 1 is written to CF

Bits 6, 5, 2, and 1—Reserved: These bits always read 0. The write value should always be 0.

Bit 4—Carry Interrupt Enable Flag (CIE): When the carry flag (CF) is set to 1, the CIE bit enables

interrupts.

Bit 4: CIE

Description

A carry interrupt is not generated when the CF flag is set to 1

(Initial value)

A carry interrupt is generated when the CF flag is set to 1

Bit 3—Alarm Interrupt Enable Flag (AIE): When the alarm flag (AF) is set to 1, the AIE bit

allows interrupts.

Bit 3: AIE

Description

An alarm interrupt is not generated when the AF flag is set to 1

(Initial value)

An alarm interrupt is generated when the AF flag is set to 1

Bit 0—Alarm Flag (AF): The AF flag is set to 1 when the alarm time set in an alarm register (only

registers with ENB bit set to 1) matches the clock and calendar time. This flag is cleared to 0 by

writing 0, but retains its previous value if 1 is written.

Bit 0: AF

Description

Clock/counter and alarm register have not matched since last reset to 0.

Clearing condition: When 0 is written to AF

(Initial value)

Setting condition: Clock/counter and alarm register have matched (only

registers with ENB set)*

Note: * Contents do not change when 1 is written to AF.

SH7708 Datenblatt(PDF) 349 Page - Renesas Technology Corp