Xilinx 7 Series User Manual page 136

Chapter 4: Receiver
Table 4-8: OOB Guidelines for Operating Rates above 1.5 Gb/s (Cont'd)
Notes:
1. The attributes pertaining to LPM, and CDR are:
•
•
•
•
•
•
•
X-Ref Target - Figure 4-10
136
Send Feedback
Protocol
RXCDR_HOLD_DURING_EIDLE
RXCDR_FR_RESET_ON_EIDLE
RXCDR_PH_RESET_ON_EIDLE
RX_LPM_HOLD_DURING_EIDLE
RXBUF_RESET_ON_EIDLE
RXBUF_EIDLE_HI_CNT
RXBUF_EIDLE_LO_CNT
Yes Is Scrambler
Is RXELECIDLE
Asserted?
Yes
RX is in Electrical Idle
Figure 4-10: Flowchart for PCIe Gen1
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Operation
PCIe Gen1
No
Present?
Is RXELECIDLE
Asserted?
No
No
Is Incoming Data
Valid?
RX is in Electrical Idle
7 Series FPGAs GTP Transceivers User Guide
No
Yes
Yes
RX is Not in Electrical Idle
UG482_c4_111_020413
UG482 (v1.9) December 19, 2016