SN65LVDS93A: 4.7kohm pull up

Kai Hsiao

Guru 12675 points

Part Number: SN65LVDS93A

HI Sir

I saw SN65LVDS93A datasheet have below 4.7kohm pull up resistor

Due to I saw Rockchip reference design ,there are no pull up resistor on Rockchip reference design

May I know what these resistor's function ?? or these resistor can solve some of problem?

over 7 years ago

0 Dennis Wu over 7 years ago

TI__Intellectual 2915 points

Hi Kai,

It is not needed to populate pull up resistors. The DIN pins can connect to processor directly.

On the other hand, you may program data words with pull up resistors supported on the EVM.

Dennis

0 Kai Hsiao over 7 years ago in reply to Dennis Wu

Guru 12675 points

Hi Dennis

Thanks for your reply

I don't understand what's means about below sentence

"On the other hand, you may program data words with pull up resistors supported on the EVM"

May I know which condition or issue need to populate pull up resistor ?

Thanks

0 Joel Jimenez0 over 7 years ago in reply to Kai Hsiao

TI__Mastermind 18655 points

Hi Kai,

In the EVM the pull-up resistors enable the customer to configure/program an input data without the need of having a processor for debugging purposes. However, as Dennis commented, the pull-ups are not a requirement.

Regards

Interface

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SN65LVDS93A: 4.7kohm pull up