SPRUIM2H May 2020 – October 2023 AM2431 , AM2432 , AM2434 , AM6411 , AM6412 , AM6421 , AM6422 , AM6441 , AM6442
XFR read transactions are passive and have no effect on any status or other states in RX L2. The firmware can also read R18 to determine which Bank has active write transactions and the location of the transaction. With this information, the firmware can read multiple times the stable preserved data. Note: When RX L1 data is written to RX L2, the next status byte gets cleared at the same time the current status byte gets updated. The rest of the status buffer is persistent. When software is accessing any register of the ping/ pong buffer, software needs to issue an XFER read transaction to fetch the latest/current state of the ping/pong buffer. The PRU registers will not reflect the current snapshot of L2 unless an XFER is issued by software.