Altera Corporation
2–59
October 2007
Stratix II GX Device Handbook, Volume 2
Stratix II GX Transceiver Architecture Overview
Table 2–12
shows the allowed transmitter and receiver settings in a
Stratix II GX to Stratix GX DC coupled link.
Stratix GX Transmitter (PCML) to Stratix II GX Receiver (PCML)
Figure 2–49
shows a typical Stratix GX to Stratix II GX DC coupled link.
Figure 2–49. Stratix GX to Stratix II GX DC Coupling
Table 2–12. Settings for a Stratix II GX to Stratix GX DC Coupled Link
Transmitter (Stratix II GX) Settings
Receiver (Stratix GX) Settings
Data Rate
VCCH
(1)
TX V
CM
(1)
Differential
Termination
Data Rate
RX V
CM
Differential
Termination
600-3187.5
Mbps
1.5 V
(1.5 V
PCML)
0.6 V/0.7 V
100/120/150-
Ω
600-3187.5
Mbps
1.1 V
100/120/150-
Ω
Note to
Table 2–12
:
(1)
VCCH = 1.5 V with TX Vcm = 0.7 V can support data rates from 600 Mbps to 3125 Mbps. VCCH = 1.5 V with TX
Vcm = 0.6 V can support data rates from 600 Mbps to 3187.5 Mbps.
Trace
Trace
Stratix II GX
Receiver
TX
V
CM
RX
V
CM
50/60/75-
RX Termination
Ω
VCCH = 1.5 V
Stratix GX
Transmitter
50/60/75-
TX Termination
Ω
50/60/75-
TX Termination
Ω
0.75 V
50/60/75-
RX Termination
Ω
0.85 V
R
s