Gaps - 3.1 English

UltraScale+ Devices Integrated 100G Ethernet Subsystem Product Guide (PG203)

Document ID
Release Date
3.1 English

The purpose of the segmented LBUS is to provide a means to optimally use the data bus. Therefore, as discussed in Active Segments , segments must be filled in sequence with no gaps between used segments. However, if a segment has an EOP, the following segments might be inactive. For example, the following combinations are permitted during a single clock cycle:

tx_enain0=1 tx_eopin0=0      tx_enain1=1 tx_eopin1=0
tx_enain2=1 tx_eopin2=1      tx_enain3=0 tx_eopin3=0

tx_enain0=1 tx_eopin0=0      tx_enain1=1 tx_eopin1=1
tx_enain2=0 tx_eopin2=0      tx_enain3=0 tx_eopin3=0

tx_enain0=1 tx_eopin0=1      tx_enain1=0 tx_eopin1=0
tx_enain2=0 tx_eopin2=0      tx_enain3=0 tx_eopin3=0