2.4.2.1 DFE Coefficients

DFE Calibration of the DFE Coefficients is not be performed in Static DFE. See DFE Calibration.

To set the required registers with static values, users must enhance the “set_io” PDC command to add new attributes. The new attributes that need to be added are highlighted in the below PDC command.

PDC command example:

set_io -port_name LANE0_RXD_N \
-RX_DFE_COEFFICIENT_H1 20 \
-RX_DFE_COEFFICIENT_H2 20 \
-RX_DFE_COEFFICIENT_H3 20 \
-RX_DFE_COEFFICIENT_H4 20 \
-RX_DFE_COEFFICIENT_H5 20 \
-DIRECTION INPUT

The RX_DFE_COEFFICIENT attributes are optional (applied only when Static calibration is selected). These attributes take integer values between 0 and 15. The corresponding register fields are 5 bits wide in all cases with the MSB bit reserved for sign bit.