BH1721FVC-TR Rohm Semiconductor, BH1721FVC-TR Datasheet - Page 7

• Manufacturer Part Number: BH1721FVC-TR
• Description: Industrial Optical Sensors Ambient Light Sensor Digital 16bit Serial
• Manufacturer: Rohm Semiconductor
• Type: Ambient Light Sensor with Digital Outputr

Specifications of BH1721FVC-TR

• Product: Ambient Light Sensor
• Wavelength: 560nm
• Output Type: I²C™
• Package / Case: SOT-665
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

●Measurement sequence example from "Write instruction" to "Read measurement result"
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BH1721FVC
www.rohm.com
ex1) Continuously Auto-resolution mode
① Send "Continuously Auto-resolution mode " instruction
② Wait to complete 1st Auto-resolution mode measurement.( max. 180ms )
③ Read measurement result.
ex2) Continuously L-resolution mode
① Send " Continuously L-resolution mode " instruction
② Wait to complete L-resolution mode measurement.( max. 24ms )
③ Read measurement result
How to calculate when the data High Byte is "00000001" and Low Byte is "00010000"
How to calculate when the data High Byte is "10000011" and Low Byte is "10010000"
The result of continuously measurement mode is updated.
ST
ST
ST
( 2
( 2
S T
15
8
+ 2
+ 2
4
9
) / 1.2 ≒ 227 [ lx ]
+ 2
from Master to Slave
8
+ 2
0100011
7
0100011
+ 2
0100011
0100011
4
) / 1.2 ≒ 28067 [ lx ]
Low Byte [ 7:0 ]
Low Byte [ 7:0 ]
0
0
1
1
Ack
Ack
7/15
Ack
Ack
00010000
00010011
High Byte [ 15:8 ]
High Byte [ 15:8 ]
Ack
Ack
from Slave to Master
SP
SP
Ack
Ack
Technical Note
2010.02 - Rev.A
Ack
Ack
SP
SP