Revision J – April 7, 2006
S2004 – Quad Serial Backplane Device
Data Sheet
Table 7. Error and Status Reporting
ERR
EOF
KFLAG
Description
Rank
0
0
0
0
0
1
Normal Character. Indicates that a valid data character has been detected.
7
7
K Character (not K28.5). Indicates that a K Character other than K28.5 has been
detected.
0
1
0
Channel Lock Detected. Asserts for one parallel word on the ERRA, EOFA, and KFL-
AGA signals that all four channels have identified the re-sync sequence within the byte
de-skew window.
2
0
1
1
1
0
0
1
0
1
K28.5+ or K28.5-. Indicates that a K28.5 character of arbitrary parity has been
detected.
5
4
1
Codeword Violation. Indicates that a word not corresponding to any valid Dx.x or Kx.x
mapping has been received.
Loss of Sync. Asserts for one parallel word to indicate that a condition has occurred
which results in loss of channel lock. When operating in the independent mode, indi-
cates loss of CRU bit lock.
1
1
1
1
0
1
Parity Error. Indicates that a running disparity error has been observed.
6
3
Re-Sync (K28.5 x 4 + Dx.x). Asserts for one parallel word indicating that four consecu-
tive K28.5 characters followed by a valid Dx.x character has been received. Each chan-
nel reports this condition independently and all four channels must identify the re-sync
within the allowed byte de-skew time before channel lock can be achieved and be indi-
cated with CHANNEL LOCK DETECTED (see above).
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