BH1750FVI
Technical Note
● Timing chart for VCC and DVI power supply sequence
DVI is I 2 C bus reference voltage terminal. And it is also asynchronous reset terminal. It is necessary to set to 'L'
after V CC is
supplied. In DVI 'L' term, internal state is set to Power Down mode.
1) Recommended Timing chart1 for VCC and DVI supply.
V CC
DVI
Reset Term ( more than 1us )
2) Timing chart2 for VCC and DVI supply.
( If DVI rises within 1μs after VCC supply )
V CC
DVI
Reset Term ( more than 1us )
Don't care state
ADDR, SDA, SCL is not stable if DVI 'L' term ( 1us ) is not given by systems.
In this case, please connect the resisters ( approximately 100kOhm ) to ADDR without directly
connecting to VCC or GND,
because it is 3 state buffer for Internal testing.
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2011.11 - Rev.D
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