ort82g5 Lattice Semiconductor Corp., ort82g5 Datasheet - Page 26

• Manufacturer Part Number: ort82g5
• Description: Xaui And Fc Fpscs
• Manufacturer: Lattice Semiconductor Corp.

Lattice Semiconductor
Table 5. XAUI Link Synchronization State Diagram Notation – Variables
Figure 10. XAUI Link Synchronization State Diagram
sync_status
enable_CDET
gd_cg
Variable
FAIL: Lane is not synchronized (correct 10-bit alignment has not been established).
OK: Lane is synchronized.
OK_NOC: Lane is synchronized but a comma character has not been detected in the past 200 code groups.
TRUE: Align subsequent 10-bit words to the boundary indicated by the next received comma.
FALSE: Maintain current 10-bit alignment.
Current number of consecutive cg_good indications.
sync_status <= OK
gd_cg <= 0
gd_cg <= 0
gd_cg <= 0
cg_bad
cg_bad
cg_bad
cg_bad
Sync_ Acq’d_2
Sync_ Acq’d_4
Sync_Acq’d_1
Sync_ Acq’d_3
cg_bad
cg_bad
cg_bad
cg_good
cg_good
cg_good
no_comma & cg_bad
enable_CDET <= FALSE
enable_CDET <= TRUE
~ no_comma & cg_bad
sync_status <= FAIL
Comma_Detect_3
Comma_Detect_1
Comma_Detect_2
cg_good x (gd_cg = 3)
Loss_of_Sync
cg_good*(gd_cg=3)
reset
26
sync_complete
cg_comma
cg_comma
cg_comma
ORCA ORT42G5 and ORT82G5 Data Sheet
Description
sync_status <= OK_NOC
gd_cg <= gd_cg + 1
gd_cg <= gd_cg + 1
gd_cg <= gd_cg + 1
Sync_Acq’d_1a
Sync_ Acq’d_2a
Sync_ Acq’d_4a
cg_bad
Sync_ Acq’d_3a
cg_bad
cg_bad
cg_good x (gd_cg = 3)
cg_comma
(gd_cg ! = 3)
(gd_cg ! = 3)
cg_good x
(gd_cg ! = 3)
cg_good x
cg_good x