SN65LVCP114: About I2C

user5072941

Prodigy 30 points

Part Number: SN65LVCP114

1、what is the I2C_SEL pin internal circuit structure? when use GPIO mode ,if can be floating ?

2、When use GPIO mode ,how to deal with the I2C_SCL/I2C_SDA ,if can be floating?

Thank you !

over 5 years ago

0 Clemens Ladisch over 5 years ago

Guru 279960 points

The Pin Functions table in the datasheet says that I2C_SEL has a pulldown, so you can leave it open. (The pulldown prevents floating.)

For SDA/SCL, the same table says "no action needed".

0 user5072941 over 5 years ago in reply to Clemens Ladisch

Prodigy 30 points

Hello!

The datasheet discribes the pin with pullup and pulldown for HIZ,if I can make the pin float for HIZ when use in the following circumstance?

0 Lee Sledjeski over 5 years ago in reply to user5072941

TI__Mastermind 43795 points

I2C_SEL has an internal 48K pull-down. This pin does not require any external components to use GPIO mode.

When in GPIO mode the SCL and SDA pins do not require any external connection, I would still recommend to have a 10K resistor pull-up (DNP) on both pins. This way the device could be exercised in I2C mode by populating the resistors on the board layout

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SN65LVCP114: About I2C