B.2. GENERIC END POINT DEVICES: SOFTWARE-ASSISTED ERROR RECOVERY OPTION
This section describes the 1x/4x LP-Serial registers for a general end point device that supports software assisted error recovery. This is most useful for devices that for whatever reason do not want to implement error recovery in hardware and to allow software to generate link-request control symbols and see the results of the responses. This extended features register block is assigned extended features block ID=0×0002.
|11||Output Retry-encountered||0b0||Output port has encountered a retry condition. This bit is set when bit 13 is set. Once set, remains set until written with a logic 1 to clear|
|12||Output Retried||0b0||Output port has received a packet-retry control symbol and can not make forward progress. This bit is set when bit 13 is set and is cleared when a packet-accepted or a packet-not-accepted control symbol is received (read-only)|
|13||Output Retry-stopped||0b0||Output port has received a packet-retry control symbol and is in the 'output retry-stopped' state (read-only)|
|14||Output Error-encountered||0b0||Output port has encountered (and possibly recovered from) a transmission error. This bit is set when bit 15 is set. Once set, remains set until written with a logic 1 to clear|
|15||Output Error-stopped||0b0||Output is in the 'output error-stopped' state (read-only)|
|21||Input Retry-stopped||0b0||Input port is in the 'input ...|