DP83822I: Do I need any pull/down resistors on control/data lines?

Pavlin Stoyanoff

Part Number: DP83822I

Tool/software:

Greetings! I want to use DP83822I as ethernet transceiver for Xilinx Zynq FPGA. I don`t see any pull/down resistors on the schematics with BP83822. Do I need to add any on the TX_CLK, TX_EN / TX_CTRL , TX_D[0..4],RX_CLK,RX_EN / RX_CTRL , RX_D[0..4]?

Thanks!

3 months ago

0 Gerome Cacho 3 months ago

TI__Mastermind 31755 points

Hello,

For what purpose are you wanting to use PU/PD resistors for DP83822? Is it for normal functionality or for strapping? Which schematic are you referring to?

Sincerely,

Gerome

0 Pavlin Stoyanoff 3 months ago in reply to Gerome Cacho

Expert 1485 points

I read in the datasheet that they have internal pull up/down but i am not sure if it is enough! I saught a few schematics but i am not sure if they are correct..

Thanks!

0 Gerome Cacho 3 months ago in reply to Pavlin Stoyanoff

TI__Mastermind 31755 points

Hello,

If you haven't already, we do have some designs using DP83822 (such as DP83822 EVM, DP83TD510EVM) which have the PHY featured in an example schematic.

Sincerely,

Gerome

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DP83822I: Do I need any pull/down resistors on control/data lines?