Gaps - 2.6 English

UltraScale Devices Integrated 100G Ethernet Subsystem Product Guide (PG165)

Document ID
PG165
Release Date
2023-06-15
Version
2.6 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