TPS6594-Q1: Do LEOA_SCLK LEOA_SDATA need pull down resistor?

Hui-Liu

Expert 1420 points

Part Number: TPS6594-Q1

We delete the pull down resistor R509 R510, the TDA4 board boot up OK.

Do LEOA_SCLK LEOA_SDATA need pull down resistor?

what function are LEOA_SCLK LEOA_SDATA used for?

Thanks.

over 4 years ago

0 Chris Sterzik over 4 years ago

TI__Guru 64601 points

Hello,

The pulldown for SPMI_SCLK (GPIO5) and SPMI_SDATA (GPIO6) is required for TPS659413 and TPS659411. It is not required for TPS65941111 and TPS65941212.

The SPMI communication synchronizes the two PMICs so they operate together to power up and down the system.

Chris

0 Hui-Liu over 4 years ago in reply to Chris Sterzik

Expert 1420 points

Thanks a lot.

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TPS6594-Q1: Do LEOA_SCLK LEOA_SDATA need pull down resistor?