BH1721FVC

Technical Note

8/15

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2010.02 - Rev.A

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●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

application the standard of the I

ex 1) The control signal line such as CPU is connected.

ex 2) Reset IC is used.

1, For Reset IC of the Push-Pull type

2, For Reset IC of the Open drain output

ex 3) A different power supply is used.

※

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 ).

RESET

Reset IC( Push-Pull type )

BH1721FVC

0.1µF

VCC SCL

SDA

DVI

GND

0.1µF

0.1µF

Reset IC( Open drain type )

RESET

1kΩ

0.1µF

BH1721FVC

0.1µF

VCC SCL

SDA

DVI

GND

0.1µF

Micro

Controller

0.1µF

BH1721FVC

0.1µF

VCC SCL

SDA

DVI

GND

0.1µF

0.1µF

V2

V1

BH1721FVC

0.1µF

VCC SCL

SDA

DVI

GND

0.1µF