TLIN1431-Q1: Connecting PIN/nCS pin directly to microcontroller

Vlad Popa

Part Number: TLIN1431-Q1

Tool/software:

Would connecting this pin directly to the uC pin (Renesas RL78F24) without any additional HW start the controller in SPI or PIN mode?

over 1 year ago

0 Sean Guo over 1 year ago

TI__Mastermind 30930 points

Hi Vlad,

Yes, connecting directly is totally fine. You can also include a small value series resistor (10-33 ohm) near the signal driver to slow the edge and attenuate the signal ringing, in order to avoid transients in the digital signals for the SPI bus.

Regards,

Sean

0 Vlad Popa over 1 year ago in reply to Sean Guo

Prodigy 20 points

What mode would the SBC start in?

0 Sean Guo over 1 year ago in reply to Vlad Popa

TI__Mastermind 30930 points

Hi Vlad,

Init mode would be entered upon powering up.

0 Vlad Popa over 1 year ago in reply to Sean Guo

Prodigy 20 points

I was referring to the control mode. Either pin mode or SPI.

0 Sean Guo over 1 year ago in reply to Vlad Popa

TI__Mastermind 30930 points

Hi Vlad,

PIN/nCS is used for control mode selection at power up. When tied to GND, the device set to pin mode. When connected to a high-Z processor IO pin or pulled up, the device is set to SPI mode. Please see datasheet 8.3.7 for details.

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TLIN1431-Q1: Connecting PIN/nCS pin directly to microcontroller