Altera SerialLite II Protocol - Manual (Page 53)

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SerialLite II Protocol Reference Manual
SerialLite II Specification
The transfer size is specified by a fixed multiple of columns defined
during the link initialization. The fourth byte of the {|TS1|} and {|TS2|}
ordered sets contains the transfer size; 1 column, 2 columns, 4 columns,
and all other values are reserved. Use a larger column granularity for
higher transfer rates.
Transfer Size Implementation Rules
The following transfer size implementation rules must be followed:
1. Data must be sent contiguously until the end-of-packet or a multiple
of the transfer size.
2. Idles are used to pad between the end of a short packet and the next
transfer size boundary.
3. Control sequences are not allowed to interrupt the data burst until
the next transfer size boundary.
4. Any number of control characters can be sent between data
transfers.
5. The first data byte of a packet is aligned to the beginning the
transfer size.
Transfer Size Examples
Figures 2–32 through 2–34 show examples of various transfer size
implementations.