SPRUIE9D May 2017 – May 2024 DRA74P , DRA75P , DRA76P , DRA77P
The AFIFO contains two FIFOs: one Read FIFO (RFIFO), and one Write FIFO (WFIFO). The RFIFO and the WFIFO are the same size: 64 32-bit Words. To ensure backward compatibility with existing software, both the Read and Write FIFOs are disabled by default. See Figure 26-131 for a high-level block diagram of the AFIFO. The AFIFO may be enabled/disabled and configured via the WFIFOCTL and RFIFOCTL registers. Note that if the Read or Write FIFO is to be enabled, it must be enabled prior to initializing the receive/transmit section of the McASP.