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BH1721FVC
Technical Note
application the standard of the I C bus as it finishes being satisfactory.
● Application circuit example of DVI terminal
The DVI terminal is an asynchronous reset terminal. Please note that there is a possibility that IC doesn't operate normally if
the reset section is not installed after the start-up of VCC.
(Please refer to the paragraph of "Timing chart for VCC and DVI power supply sequence”)
The description concerning SDA and the terminal SCL is omitted in this application circuit example. Please design the
2
ex 1) The control signal line such as CPU is connected.
BH1721FVC
0.1μF
VCC SCL
GND
SDA 0.1μF DVI
0.1μF
Micro
Controller
ex 2) Reset IC is used.
1, For Reset IC of the Push-Pull type
BH1721FVC
0.1μF
VCC SCL
GND
RESET
SDA 0.1μF DVI
2, For Reset IC of the Open drain output
BH1721FVC
0.1μF
Reset IC( Push-Pull type )
0.1μF
VCC SCL
GND
SDA 0.1μF DVI
1k Ω
0.1μF
RESET
Reset IC( Open drain type )
ex 3) A different power supply is used.
BH1721FVC
VCC SCL
0.1μF
V1
GND
SDA 0.1μF DVI
V2
0.1μF
※ Power supply of DVI must stand up later than power supply of VCC stand up, because it is necessary to secure reset section ( 1μs or more ).
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? 2011 ROHM Co., Ltd. All rights reserved.
8/15
2011.11 - Rev.B
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