ACP supports the following read-request transfer size and length combinations:

• 64-byte INCR request characterized by:

  • ARLEN is 0x03, 4 beats.
  • ARADDR aligned to 64-byte boundary, so ARADDR[5:0] is 0b00 0000.
  • ARSIZE and ARBURST assume values of 0b100 and INCR respectively.

• 16-byte INCR request characterized by:

  • ARLEN is 0x00, 1 beat.
  • ARADDR aligned to 16-byte boundary, so ARADDR[3:0] is 0x0.

ACP supports the following write-request transfer size and length combinations:

• 64-byte INCR request characterized by:

  • AWLEN is 0x03, 4 beats.
  • AWADDR aligned to 64-byte boundary, so AWADDR[5:0] is 0b00 0000.
  • AWSIZE and AWBURST assume values of 0b100 and INCR respectively.
  • WSTRB for all beats must be the same and either all asserted or all deasserted.

• 16-byte INCR request characterized by:

  • AWLEN is 0x00, 1 beat.
  • AWADDR aligned to 16-byte boundary, so AWADDR[3:0] is 0x0.
  • AWSIZE and AWBURST assume values of 0b100 and INCR respectively.
  • WSTRB can take any value.

Requests not meeting these restrictions cause a SLVERR response on RRESP or BRESP.