Question: When using the Autobuffered serial port, you write the first buffer start address to ARR/AXR and the block size of the buffer to BKR/BKX. Is there a buffer pointer that points to the next address to be read from/written to? The C54x User's Guide Volume 1 on page 9-46 seems to indicate that the ARR/AXR do not increment with each access.

Answer: The ARR/AXR increment with each access and point to the next address to be read from/written to.