SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
An XOUT to a transmit FIFO that does not have at least one empty line will result in a stall. Only when the PSI-L transmits some data for that thread, the stall will be released. An XIN to an receive FIFO that does not have a set of data will return blank data of all 0s, and the rx_bytes field will be set to 0. To avoid any transmit stalls, the associated status signal should be checked before sending the XOUT. Every XIN should check the rx_bytes field to determine the number of valid bytes, or the associated status signal should be checked to guarantee a full line of data.