SM8578BV 参数 Datasheet PDF下载

SM8578BV

INTERRUPT HANDLING

Alarm Interrupt

I

I

If AIE = 1 when the alarm occurs, output INTN goes LOW. If AIE = 0, INTN is in high impedance state.

The alarm interrupt is output when the 10s seconds digit carries over to the minutes digit.

"1"

AIE bit

No output while AIE is "0"

Hi−Z

INTN output

LOW−level

"1"

AF bit

"0"

Alarm interrupt

timing

"0"

Data 0 written to AF

Timer Interrupt

I

The TI/TP bit setting selects either level interrupt mode or periodic interrupt mode output (with the AIE and

FE bits set to “0”).

(1) Level interrupt mode (TI/TP = “0”)

I

If TIE = “1” when the interrupt occurs, output INTN goes LOW. If TIE = “0”, INTN is in high imped-

ance state.

"1"

TIE bit

No output

while TIE is "0"

INTN output

LOW−level

"1"

TF bit

"0"

Timer interrupt

timing

Data 0 written to TF

"0"

Hi−Z

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