Test the eye diagram of on-chip HDMI on DM8168

Omin Chou

Dear all,

I test the eye diagram of on-chip HDMI on DM8168. Unfortunately, HDMI encounters fail in the low level range of voltage. Can anyone give some hints to pass this test?

Thanks in advance.

B.R.

over 13 years ago

0 Biser Gatchev-XID over 13 years ago

TI__Guru**** 393215 points

Can you check if there is a 5.9kOhm ±1% resistor, connected from DM8168 HDMI_EXTSWING (ball AN25) to GND?

Best Regards

Biser

0 Rich Chen over 12 years ago in reply to Biser Gatchev-XID

TI__Expert 4170 points

OC,

We had observed same problem on DM8148 and identied it can be managed by adding 50ohm termintors pull up to 3.3V on CLK+ and CLK- signals.

A additional SMA probe connecting on CLK pair can achieve it.

Best Regard,

Rich

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Test the eye diagram of on-chip HDMI on DM8168