SN75DP122A: HPD Pin Information

MINWOOK JUNG

Part Number: SN75DP122A

Tool/software:

Hi,

I have a question about the HPD pin.

Currently, it is connected with CPU - SN75DP122A - HDMI connector structure.

DP is unused, PRIORITY pin and LP pin are set to High, and TMDS pin is connected to HDMI connector.

Looking at the datasheet, it seems that 100K Pull down is applied, but don't you usually put a Pull up resistor between SN75DP122A - HDMI connector?

I wonder which one is correct.

0 MINWOOK JUNG 7 months ago

The pin related to the pull-down resistor and pull-up resistor is the TMDS_HPD pin.

+1 J 7 months ago in reply to MINWOOK JUNG

Hi Minwook,

MINWOOK JUNG said:
Looking at the datasheet, it seems that 100K Pull down is applied

I couldn't find anything about this in the datasheet.

However, you would normally put a pull up resistor.

Best,
J

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