BH1751FVI-TR Rohm Semiconductor, BH1751FVI-TR Datasheet - Page 11

• Manufacturer Part Number: BH1751FVI-TR
• Description: IC AMBIENT LIGHT SENSOR 6WSOF
• Manufacturer: Rohm Semiconductor
• Series: -r

Specifications of BH1751FVI-TR

• Wavelength: 560nm
• Output Type: I²C™
• Package / Case: 6-WSOF Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

●H-Resolution Mode2
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BH1751FVI
www.rohm.com
H-resolution mode2 is 0.5lx (typ.) resolution mode. It is suitable if under less than 10 lx measurement 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
○Measurement sequence example from "Write instruction" to "Read measurement result"
ex) Continuously H-resolution mode2 ( ADDR = 'L' )
① Send "Continuously H-resolution mode2 " instruction
② Wait to complete 1st H-resolution mode2 measurement.( max. 180ms. )
③ Read measurement result.
Continuously H-Resolution Mode2
One Time H-Resolution Mode2
How to calculate when the data High Byte is "00000000" and Low Byte is "00010010"
ST
( 2
ST
3
+ 2
0
) / 1.2 ≒ 7.5 [ lx ]
Instruction
from Master to Slave
0100011
0100011
2
6
2
5
0001_0001
0010_0001
Opecode
2
Low Byte [7:0]
4
2
0
3
1
2
2
Ack
11/16
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.
2
Ack
1
2
0
2
-1
2
14
2
13
00010001
High Byte [15:8]
Ack
2
from Slave to Master
12
2
11
Comments
SP
2
10
2
9
2
8
2
7
Ack
Technical Note
2010.02 - Rev.A
Ack
SP