3.6.4. Packet Data Transfers
Packet data transfers are used for multichannel transfers. Two additional signals (startofpacket and endofpacket) are defined to implement the packet transfer.
The multiple symbols per beat scenario applies to both the sink interface on MISO CIC filters and the source interface of SIMO CIC filters. All other interfaces operate with a single symbol per beat, but the interfaces also support multiple channels using packets.
During cycle 1, the CIC IP asserts startofpacket, and transfers the first four bytes of packet. During cycle 5, the CIC IP asserts endofpacket indicating that this is the end of the packet. The channel signal indicates the channel index associated with the data. For example, on cycle 1, the data D0, D1, D2, and D3 associated with channel 0 are available.