Linux/TCA9546A: TCA9546A Communication

Viktor Smirnov

Part Number: TCA9546A

Tool/software: Linux

Hi TI,

I have TCA9546APWR multiplexer and the same connection diagram with 1.8v. Only two slave sda/scl channels. It is correct wiring or i should pull-up unsed channles too?

Best regards, Viktor.

over 5 years ago

0 fhoude over 5 years ago

TI__Genius 17215 points

Hello Viktor,

I can't read your schematic it is way too small, but generally speaking you don't have to connect anything to the unused channels in an I2C switch. If you do anything, make sure it is a pull up resistor to VCC, so if you do make a mistake coding you don't have excessive current draw.

-Francis Houde

0 Viktor Smirnov over 5 years ago in reply to fhoude

Prodigy 70 points

Sorry, was resized. Yes, pull-up to 1.8v, 1.5kohm. Thank you.

0 Viktor Smirnov over 5 years ago in reply to Viktor Smirnov

Prodigy 70 points

Hi TI,

The problem with switch still not resolved.

Could you read my nvidia topic, please?

Best regards, Viktor.

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Linux/TCA9546A: TCA9546A Communication