Data Sheet

13/19

TSZ02201-0M3M0F616080-1-2

23.May.2016 Rev.002

www.rohm.com

TSZ22111・15・001

BH1745NUC

Interrupt threshold H level

time

persistence = 1

Master writes “Interrupt reset” command.

sequential measurement results

persistence = 4

Interrupt threshold L level

DATA

(selected from RGBC)

INT Terminal

Interrupt Function

Interrupt function compares the measurement result selected from RGBC data by INT SOURCE register (60h<3:2>) to

preset interrupt threshold level. Interrupt status is monitored by INT pin. Interrupt function is able to be controlled by

INTERRUPT register (60h).

Interrupt persistence is defined at PERSIST register (61h).

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

resister.

There are two output modes about interrupt function (latched mode and unlatched mode).

INT terminal is high impedance when VCC is supplied.

INT terminal becomes inactive by writing INT reset command, reading INTERRUPT register, writing 0 to INT ENABLE bit

of INTERRUPT register or software reset.

INT terminal keeps just previous state when power down command is sent. So to set INT terminal to high impedance

before power down command is sent is recommended. VCC current (approximately 25µA at VCC=2.5V) is consumed

during INT terminal is ‘L’.

Ex1 )

In case of unlatch mode if the Data measurement value is within the range set by interrupt threshold ‘H’ and ‘L’ value, the

interrupt becomes inactive. And if the measurement value is out of the range set by threshold ‘H’ and ‘L’ value, the

interrupt becomes active.

In case of latch mode once the interrupt becomes active, it keeps the status until INT reset command is done or

INTERRUPT register is read.