HC4GX15 Datasheet, PDF (390/668 Pages) Altera Corporation – HardCopy IV Device Handbook

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Chapter 1: HardCopy IV GX Transceiver Architecture
Functional Modes
1 Description of PCI Express (PIPE) hard IP architecture and PIPE mode configurations
allowed when using the PIPE hard IP block are beyond the scope of this chapter. For
more information about the PIPE hard IP block, refer to the PCI Express Compiler User
Guide.
PCI Express (PIPE) Mode Configurations
HardCopy IV GX transceivers support both Gen1 (2.5 Gbps) and Gen2 (5 Gbps) data
rates in PIPE functional mode. When configured for a Gen2 (5 Gbps) data rate, the
HardCopy IV GX transceivers allow dynamic switching between Gen2 (5 Gbps) and
Gen1 (2.5 Gbps) signaling rates. Dynamic switch capability between the two PIPE
signaling rates is critical for speed negotiation during link training.
HardCopy IV GX transceivers support ×1, ×4, and ×8 lane configurations in PIPE
functional mode at both 2.5 Gbps and 5 Gbps data rates. In PIPE ×1 configuration, the
PCS and PMA blocks of each channel are clocked and reset independently. PIPE ×4
and ×8 configurations support channel bonding for four-lane and eight-lane PIPE
links. In these bonded channel configurations, the PCS and PMA blocks of all bonded
channels share common clock and reset signals.
HardCopy IV Device Handbook Volume 3
© June 2009 Altera Corporation