Bitstream Authentication System Service

The bitstream authentication system service parses a bitstream image stored in the SPI flash and verifies the integrity of the bitstream. The following table lists the fields in a bitstream authentication service request.

Table 1. Bitstream Authentication Service Request
System Service Descriptor Bit Field Value Description
15:7 MBOXADDR[10:2] Mailbox address. For the format, see Table 2.
6:0 23H Bitstream authentication command code.

The following table describes the bitstream authentication service mailbox format.

Table 2. Bitstream Authentication Service Mailbox Format
Offset Length (bytes) Parameter Direction Description
0 4 SPIADDR Input Address of the bitstream in SPI flash.

If the external SPI flash device does not support 32-bit addresses, SPIADDR[31:24] is ignored.