BH1750FVI 查看數據表（PDF） - ROHM Semiconductor

零件编号

产品描述 (功能)

生产厂家

BH1750FVI

Ambient Light Sensor IC Series Digital 16bit Serial Output Type Ambient Light Sensor IC

ROHM Semiconductor 

BH1750FVI

Technical Note

●H-Resolution Mode2

H-resolution mode2 is 0.5lx ( typ. ) resolution mode. It is suitable if under less than 10 lx measure ment data is necessary.

This measurement mode supports " Adjust measurement result for influence of optical window ". Please refer it. It is possible

to detect min. 0.11 lx by using H-resolution mode2.

○ Instruction set architecture for H-resolution mode2

Instruction

Opecode

Continuously H-Resolution Mode2 0001_0001

One Time H-Resolution Mode2

0010_0001

Comments

Start measurement at 0.5lx resolution.

Measurement Time is typically 120ms.

Start measurement at 0.5lx resolution.

Measurement Time is typically 120ms.

It is automatically set to Power Down mode after measurement.

○ Measurement sequence example from "Write instruction" to "Read measurement result"

ex) Continuously H-resolution mode2 ( ADDR = 'L' )

from Master to Slave

from Slave to Master

① Send "Continuously H-resolution mode2 " instruction

ST

0100011

0 Ack

00010001

Ack SP

② Wait to complete 1st H-resolution mode2 measurement.( max. 180ms. )

③ Read measurement result.

ST

0100011

1 Ack

High Byte [15:8]

214 213 212 211 210 29 28 27

Ack

Low Byte [7:0]

26 25 24 23 22 21 20 2-1

Ack SP

How to calculate when the data High Byte is "00000000" and Low Byte is "00010010"

( 23+ 20 ) / 1.2 ≒ 7.5 [ lx ]

www.rohm.com

© 2011 ROHM Co., Ltd. All rights reserved.

12/17

2011.11 - Rev.D

Share Link: