RX Data Signals - 1.0 English

Versal Adaptive SoC PHY for PCI Express LogiCORE IP Product Guide (PG345)
Document ID
PG345
Release Date
2023-11-01
Version
1.0 English
Table 1. RX Data Signals
Port Name Width I/O Clock Domain Description
phy_rx[p/n] 1 Input Serial The differential receiver inputs to the PHY. Per-lane.
phy_rxdata[63:0] 64 Output pclk PIPE data output from receiver. Bits[63:32] are used for Gen5 and Gen4 and must be ignored in Gen1, Gen2, and Gen3. Bits[31:16] are used for Gen3 only and must be ignored in Gen1 and Gen2. Per-lane.
phy_rxdatak[1:0] 2 Output pclk Indicates whether RXDATA is control or data. Gen1 and Gen2 only. Per-lane.
  • 0b: Data
  • 1b: Control
phy_rxdata_valid 1 Output pclk This signal allows the PHY to instruct the MAC to ignore RXDATA for one pclk cycle. When logic High, this indicates to use RXDATA. When logic Low, this indicates to ignore RXDATA for one pclk cycle. Gen3 and Gen4 only. Per-lane.
phy_rxstart_block[1:0] 2 Output pclk This signal allows the PHY to tell the MAC the starting byte for a 128b block.
  • 00b: Data with no start
  • 01b: A block starts at lower 32 bits
  • 10b: A block starts at upper 32 bits, inactive when operating at Gen3 speed.
  • 11b: Illegal value when operating at Gen3 speed.
Gen3 and Gen4 only. Per-lane.
phy_rxsync_header[1:0] 2 Output pclk Provide the sync header for the MAC to use the next 128b block. The MAC reads this value when the RXSTART_BLOCK is asserted. Gen3 and Gen4 only. Per-lane.