SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The port 1 (and port 2) transmit inter-packet gap (IPG) may be shortened by eight bit times when enabled and triggered. The TX_SHORT_GAP_EN bit in the SL_MACCONTROL register enables the gap to be shortened when triggered. The condition is triggered when the port 1 (port 2) transmit FIFO has a user defined number of FIFO blocks used. The port 1 transmit FIFO blocks used determines if the port 1 gap is shortened, and the port 2 transmit FIFO blocks used determines if the port 2 gap is shortened. The CPSW_GAP_THRESH register value determines the port 1 short gap threshold, and the CPSW_GAP_THRESH register value determines the port 2 short gap threshold.