HC4GX15 Datasheet, PDF (420/668 Pages) Altera Corporation – HardCopy IV Device Handbook

1–156
Chapter 1: HardCopy IV GX Transceiver Architecture
Functional Modes
Table 1–43 lists the XGMII-to-PCS code group conversion in XAUI functional mode.
The XGMII TXC control signal is equivalent to the tx_ctrlenable signal; the
XGMII TXD control signal is equivalent to the tx_datain[7:0] signal.
Table 1–43. XGMII Character to PCS Code-Group Mapping
XGMII TXC
0
XGMII TXD (1)
00 through FF
PCD Code Group
Dxx,y
1
07
K28.0 or K28.3 or
K28.5
1
07
K28.5
1
9C
K28.4
1
FB
K27.7
1
FD
K29.7
1
FE
K30.7
1
Any other value
K30.7
Note to Table 1–41:
(1) The values in the XGMII TXD column are in hexadecimal.
Description
Normal data
transmission
Idle in ||I||
Idle in ||T||
Sequence
Start
Terminate
Error
Invalid XGMII
character
PCS-To-XGMII Code Conversion at the Receiver
In XAUI mode, the 8B/10B decoder in the HardCopy IV GX receiver datapath is
controlled by a XAUI receiver state machine that converts received PCS code groups
into specific 8-bit XGMII codes. This state machine complies with the IEEE P802.3ae
specifications.
Table 1–44 lists the PCS-to-XGMII code group conversion in XAUI functional mode.
The XGMII RXC control signal is equivalent to the rx_ctrldetect signal; the
XGMII RXD control signal is equivalent to the rx_dataout[7:0] signal.
Table 1–44. PCS Code Group to XGMII Character Mapping
XGMII RXC
0
XGMII RXD (1)
00 through FF
PCD Code Group
Dxx,y
1
07
K28.0 or K28.3 or
K28.5
1
07
K28.5
1
9C
K28.4
1
FB
K27.7
1
FD
K29.7
1
FE
K30.7
1
FE
Invalid code group
Note to Table 1–41:
(1) The values in the XGMII RXD column are in hexadecimal.
Description
Normal data
transmission
Idle in ||I||
Idle in ||T||
Sequence
Start
Terminate
Error
Received code group
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation