BH1750FVI 查看數據表（PDF） - ROHM Semiconductor
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BH1750FVI
ROHM Semiconductor
BH1750FVI Datasheet PDF : 18 Pages
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BH1750FVI
Technical Note
●Measurement sequence example from "Write instruction" to "Read measurement result"
ex1) Continuously H-resolution mode ( ADDR = 'L' )
from Master to Slave
from Slave to Master
① Send "Continuously H-resolution mode " instruction
ST
0100011
0 Ack
00010000
② Wait to complete 1st H-resolution mode measurement.( max. 180ms. )
③ Read measurement result.
ST
0100011
1 Ack
High Byte [ 15:8 ]
Low Byte [ 7:0 ]
Ack SP
Ack SP
Ack
How to calculate when the data High Byte is "10000011" and Low Byte is "10010000"
( 215 + 29 + 28 + 27 + 24 ) / 1.2 ≒ 28067 [ lx ]
The result of continuously measurement mode is updated.( 120ms.typ at H-resolution mode, 16ms.typ at L-resolution
mode )
ex2 ) One time L-resolution mode ( ADDR = 'H' )
① Send "One time L-resolution mode " instruction
ST
1011100
0 Ack
00100011
② Wait to complete L-resolution mode measurement.( max. 24ms. )
③ Read measurement result
ST
1011100
1 Ack
High Byte [ 15:8 ]
Ack SP
Ack
Low Byte [ 7:0 ]
Ack SP
How to calculate when the data High Byte is "00000001" and Low Byte is "00010000"
( 28 + 24 ) / 1.2 ≒ 227 [ lx ]
In one time measurement, Statement moves to power down mode after measurement completion.If updated result is need
then please resend measurement instruction.
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7/17
2011.11 - Rev.D
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