September 2003
Intermediate to advanced
1120 pages
23h 44m
English
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ACK/NAK Protocol Details
This section describes the detailed transmitter and receiver behavior in processing TLPs and ACK/NAK DLLPs. The examples demonstrate flow of TLPs from transmitter to the remote receiver in both the normal non-error case, as well as the error cases.
Transmitter Protocol Details
This section delves deeper into the ACK/NAK protocol. Consider the transmit side of a device's Data Link Layer shown in Figure 5-4 on page 215.
Sequence Number
Before a transmitter sends TLPs delivered by the Transaction Layer, the Data Link Layer appends a 12-bit Sequence Numbers to each TLP. The Sequence Number is generated by the 12-bit NEXT_TRANSMIT_SEQ counter. The counter is initialized to 0 at reset, or when the Data Link Layer is in the ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.