DP83822I: LED_0 Connect to MCU

Kotaro Yamashita

Intellectual 2560 points

Part Number: DP83822I

Hi,

I would like to connect LED_0(LINK) pin to MCU directly. In this case,

1. Is current limit resistor required?

2. Need pull-up resistor?

Regards,

Kotaro Yamashita

over 6 years ago

0 Aniruddha Khadye over 6 years ago

TI__Mastermind 18425 points

Hi Yamashita-san,

Current limiting resistor is not required. A pull resistor is a good idea because the internal pull up resistor is weak and can be accidentally over powered by the internal resistance of the MCU pin.

-Regards
Aniruddha

0 Kotaro Yamashita over 6 years ago in reply to Aniruddha Khadye

TI__Intellectual 2560 points

Hi Aniruddha,

Thanks. Is there recommendation value of pull-up resistor?

Regards,

Kotaro Yamashita

0 Aniruddha Khadye over 6 years ago in reply to Kotaro Yamashita

TI__Mastermind 18425 points

Hi Yamashita-san,

For LED pin you can use pull resistor with value between 1.96kohm to 2.49kohm.

-Regards
Aniruddha

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DP83822I: LED_0 Connect to MCU