Data Sheet

11/19

TSZ02201-0M3M0F616080-1-2

23.May.2016 Rev.002

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TSZ22111・15・001

BH1745NUC

Explanation of Software Reset Command

All registers are reset and BH1745NUC becomes power down by Software reset command.

Explanation of Accessing MODE_CONTROL

If master Writes to MODE_CONTROL1(41h), MODE_CONTROL2(42h) and MODE_CONTROL3(44h) register,

RGBC measurement currently in progress is interrupted immediately and re-started from the beginning,

and VALID register returns to ‘L’. When the re-started measurement is finished, VALID register turns to ‘H’.

Power on Sequence

Please note the below behavior when application design.

1) Power on time: t1

"t1" should be more than 2ms. The IC becomes active state after 2ms by which VCC voltage goes beyond 2.0V from

less than 0.4V.

2) Power off time: t2

"t2" should be more than 1ms. The period that VCC is less than 0.4V should be more than 1ms before power supply.

* "active state" means the state that the IC operates correctly.

When power supply, INT terminal is hi-impedance state.

Once VCC goes below 2.0V, power supply sequence should follow below sequence.

0.4V

VCC

2.0V

active

Undefined behavior

BH1745NUC

Undefined behavior

active