ep1agx50d Altera Corporation, ep1agx50d Datasheet - Page 17

• Manufacturer Part Number: ep1agx50d
• Description: Arria Gx Device Data Sheet
• Manufacturer: Altera Corporation

Altera Corporation
May 2008
0
1
1
1
1
1
1
1
1
Table 2–3. On-Chip Termination Support by I/O Banks
XGMII TXC
00 through FF
07
07
9C
FB
FD
FE
See IEEE 802.3 reserved
code groups
Other value
XGMII TXD
GIGE Mode
In GIGE mode, the transmit state machine converts all idle ordered sets
(/K28.5/, /Dx.y/) to either /I1/ or /I2/ ordered sets. The /I1/ set
consists of a negative-ending disparity /K28.5/ (denoted by /K28.5/-),
followed by a neutral /D5.6/. The /I2/ set consists of a positive-ending
disparity /K28.5/ (denoted by /K28.5/+) and a negative-ending
disparity /D16.2/ (denoted by /D16.2/-). The transmit state machines do
not convert any of the ordered sets to match /C1/ or /C2/, which are the
configuration ordered sets. (/C1/ and /C2/ are defined by [/K28.5/,
/D21.5/] and [/K28.5/, /D2.2/], respectively). Both the /I1/ and /I2/
ordered sets guarantee a negative-ending disparity after each ordered set.
XAUI Mode
The transmit state machine translates the XAUI XGMII code group to the
XAUI PCS code group.
The XAUI PCS idle code groups, /K28.0/ (/R/) and /K28.5/ (/K/), are
automatically randomized based on a PRBS7 pattern with an ×7 + ×6 + 1
polynomial. The /K28.3/ (/A/) code group is automatically generated
between 16 and 31 idle code groups. The idle randomization on the /A/,
/K/, and /R/ code groups is done automatically by the transmit state
machine.
Dxx.y
K28.0 or K28.3 or K28.5
K28.5
K28.4
K27.7
K29.7
K30.7
See IEEE 802.3 reserved code groups
K30.7
PCS Code-Group
Table 2–3
shows the code conversion.
Arria GX Device Handbook, Volume 1
Normal data
Idle in ||I||
Idle in ||T||
Sequence
Start
Terminate
Error
Reserved code groups
Invalid XGMII character
Arria GX Architecture
Description
2–9