SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
This section describes the architecture of the Ethernet port’s receive FIFOs. Internal to the Gigabit Ethernet switch, all Ethernet ports have an identical associated packet FIFO. Each transmit packet FIFO contains eight logical transmit queues (priority 0 through 7 with 7 the highest priority). Each transmit FIFO memory contains 81,920 bytes total organized as 2560 by 256-bit words. Each FIFO also contains a single memory for the receive queue. Each receive FIFO memory contains a total of 32768 bytes total organized as 1024 by 256-bit words.