ep2sgx30c Altera Corporation, ep2sgx30c Datasheet - Page 23

• Manufacturer Part Number: ep2sgx30c
• Description: Stratix Ii Gx Device Data Sheet
• Manufacturer: Altera Corporation

Altera Corporation
October 2007
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Receiver Input Buffer
The Stratix II GX receiver input buffer supports the 1.2-V and 1.5-V
PCML I/O standard at rates up to 6.375 Gbps. The common mode voltage
of the receiver input buffer is programmable between 0.85 V and 1.2 V.
You must select the 0.85 V common mode voltage for AC- and
DC-coupled PCML links and the 1.2 V common mode voltage for
DC-coupled LVDS links.
The receiver has programmable on-chip 100-, 120-, or 150-Ω differential
termination for different protocols, as shown in
receiver’s internal termination can be disabled if external terminations
and biasing are provided. The receiver and transmitter differential
termination resistances can be set independently of each other.
Figure 2–12. Receiver Input Buffer
Programmable Termination
The programmable termination can be statically set in the Quartus II
software.
termination. The termination can be disabled if external termination is
provided.
Input
Pins
Lane deskew
Rate matcher
8B/10B decoder
Byte deserializer
Byte ordering
Receiver phase compensation FIFO buffer
Figure 2–13
Programmable
Termination
shows the setup for programmable receiver
Stratix II GX Device Handbook, Volume 1
Programmable
Equalizer
Figure
Stratix II GX Architecture
2–12. The
Differential
Buffer
Input
2–15