SM8578BV データシートの表示（PDF） - Nippon Precision Circuits

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SM8578BV

Real-time Clock IC

Nippon Precision Circuits  

SM8578BV

(2) Periodic mode (TI/TP = “1”)

I If TIE = “1” when the interrupt occurs, output INTN goes LOW.

I If TIE = “0” when the interrupt occurs, output INTN stays high impedance and the TF bit is set to “1”,

and this condition is maintained.

TIE bit

INTN output

TF bit

"1"

"0"

tRTN

Hi−Z

Auto-return

LOW−level

"1"

"0"

Data 0 written to TF

Timer interrupt

timing

* Auto-return: The auto-return time (tRTN) is determined by the source clock set by register C.

Source clock

4096Hz

64Hz

1Hz

1/60Hz

Auto-return time (tRTN)

0.122ms

7.81ms

0.5s

0.122ms

NIPPON PRECISION CIRCUITS INC.—12

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