TX Data Signals for UltraScale Devices Interface Ports - 1.0 English - PG239

PCI Express PHY LogiCORE IP Product Guide (PG239)
Document ID
PG239
Release Date
2024-12-18
Version
1.0 English
Table 1. TX Data Signals for UltraScale Devices
Port Name Width I/O Clock domain Description
phy_txdata[31:0] 32 Input pclk Parallel data input. Bits [31:16] are used for Gen3 only and must be ignored in Gen1 and Gen2. Per-lane.
phy_txdatak[1:0] 2 Input pclk Indicates whether TXDATA is control or data for Gen1 and Gen2 only. Per-lane.
  • 0b: Data
  • 1b: Control
phy_txdata_valid 1 Input pclk This signal allows the MAC to instruct the PHY to ignore TXDATA for one PCLK cycle. When logic is High, this indicates the PHY uses TXDATA. When logic is Low, this indicates the PHY does not use TXDATA for one PCLK cycle. Gen3 only. Per-lane.
phy_txstart_block 1 Input pclk This signal allows the MAC to tell the PHY the starting byte for a 128b block. The starting byte for a 128b block must always start at bit [0] of TXDATA. Gen3 only. Per-lane.
phy_txsync_header[1:0] 2 Input pclk Provide the sync header for the PHY to use the next 130b block. The PHY reads this value when the txsync_block is asserted. Gen3 only. Per-lane.
phy_tx[p/n] 1 Output Serial The differential transmitter outputs. Per-lane.