DP130 EQ setting

Vincent Hsieh

Expert 1895 points

Hi Sir,

We use DP130 in H/W mode.
About EQ, it is 3-level, may I use difference voltage for over 3 level EQ setting?

over 9 years ago

0 Moises Garcia over 9 years ago

TI__Mastermind 23815 points

Hi,

For ADDR_EQ we recommend using 4.7k pullup/pulldown, if you want a middle level populate both 4.7k pullup and 4.7k pulldown.

Regards

0 Vincent Hsieh over 9 years ago in reply to Moises Garcia

Expert 1895 points

Hi Sir,
Is it only 3 mode for EQ?
Can I use difference resistance for more EQ?

0 Moises Garcia over 9 years ago in reply to Vincent Hsieh

TI__Mastermind 23815 points

Hi,

In GPIO mode, you just select 3 modes, in mid level, EQ is fixed, in low level and high level there is an automatic selection of EQ depending on link training.
For example if you choose high level, and link training results in L0 pre-emphasis, you could have an EQ from 0dB to 15dB, this is automatic and depends on the loss in input signal.

If you want to select a fixed EQ level it has to be done via I2C.

Regards

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DP130 EQ setting