Technical Note

13/20

BH1730FVC

www.rohm.com

2012.02 - Rev.A

© 2012 ROHM Co., Ltd. All rights reserved.

Interrupt threshold H level

time

persistence = 1

Master writes “Interrupt output reset” command.

sequential measurement results

persistence = 2

Interrupt threshold L level

DATA0

INT Terminal

H

L

H

L

●

Interrupt function

Interrupt function compares measurement result to preset interrupt threshold level. BH1730FVC uses two threshold level

(upper and lower ). If measurement result is outside of two threshold, INT pin outputs ’L’. Interrupt threshold is defined at

Interrupt threshold registers ( 03h - 06h ).

Interrupt function is able to control by Interrupt opecode. Interrupt persistence is defined at Interrupt opecode lower 4 bits.

INT pin is Nch open drain terminal so this terminal should be pull-up to some kind of voltage source by an external resister.

Maximum sink current rating of this terminal is 7mA.

INT terminal is high impedance when VCC is supplied.

INT terminal becomes inactive by setting “Interrupt output reset” special command. VCC current (approximately 30uA at

VCC=3.0V ) is consumed during INT terminal is ‘L’. So it is recommended to reset INT terminal at once when interrupt is

detected.