SNLS589B September 2016 – July 2018 DS90UB960-Q1
|6:4||AEQ_ERR_CTL||R/W||0x7||AEQ Error Control
Setting any of these bits will enable FPD3 error checking during the Adaptive Equalization process. Errors are accumulated over 1/2 of the period of the timer set by the ADAPTIVE_EQ_RELOCK_TIME filed in the AEQ_TEST register. If the number of errors is greater than the programmed threshold (AEQ_ERR_THOLD), the AEQ will attempt to increase the EQ setting. The errors may also be checked as part of EQ setting validation if AEQ_2STEP_EN is set. The following errors are checked based on this three bit field:
 FPD3 clk1/clk0 errors
 DCA sequence errors
 Parity errors
|3||AEQ_SFIL_ORDER||R/W||0||AEQ SFILTER Adapt order This bit controls the order of adaption for SFILTER values during Adaptive Equalization.
0 : Default order, start at largest clock delay
1 : Start at midpoint, no additional clock or data delay
|2||AEQ_2STEP_EN||R/W||0||AEQ 2-step enable
This bit enables a two-step operation as part of the Adaptive EQ algorithm. If disabled, the state machine will wait for a programmed period of time, then check status to determine if setting is valid. If enabled, the state machine will wait for 1/2 the programmed period, then check for errors over an additional 1/2 the programmed period. If errors occur during the 2nd step, the state machine will immediately move to the next setting.
0 : Wait for full programmed delay, then check instantaneous lock value
1 : Wait for 1/2 programmed time, then check for errors over 1/2 programmed time. The programmed time is controlled by the ADAPTIVE_EQ_RELOCK_TIME field in the AEQ_TEST register
|1||AEQ_OUTER_LOOP||R/W||0||AEQ outer loop control
This bit controls whether the Equalizer or SFILTER adaption is the outer loop when the AEQ adaption includes SFILTER adaption.
0 : AEQ is inner loop, SFILTER is outer loop
1 : AEQ is outer loop, SFILTER is inner loop
|0||AEQ_SFILTER_EN||R/W||1||Enable SFILTER Adaption with AEQ
Setting this bit allows SFILTER adaption as part of the Adaptive Equalizer algorithm.