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ALTDQ_DQS2 Features
ALTDQ_DQS2 Device Support
Resource Utilization and Performance
ALTDQ_DQS2 Parameter Settings
ALTDQ_DQS2 Data Paths
ALTDQ_DQS2 Ports
Dynamic Reconfiguration for ALTDQ_DQS2
Stratix V Design Example
Arria V Design Example
IP-Generate Command
ALTDQ_DQS2 IP Core User Guide Archives
Document Revision History
I/O Configuration Block Bit Sequence for Arria V GZ and Stratix V Devices
DQS Configuration Block Bit Sequence for Arria V GZ and Stratix V Devices
I/O Configuration Block Bit Sequence for Arria V and Cyclone V Devices
DQS Configuration Block Bit Sequence for Arria V and Cyclone V Devices
Example Usage of Dynamic Reconfiguration for ALTDQ_DQS2
Visible to Intel only — GUID: sam1412661586127
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Data Input Path for Arria V, Cyclone V, and Stratix V Devices
The DQ and DQS input paths in Arria V and Cyclone V devices are the same, except for an additional read FIFO block to implement the second-stage rate conversion DDIO. The high‑speed 4 x 8 read FIFO, clocked by the DQS clock, implements the half-rate to full-rate conversion, if necessary.
The following figure shows the data input path (when you enable the hard read FIFO) for Arria V, Cyclone V, and Stratix V devices.
Data Input Path for Arria V, Cyclone V, and Stratix V Devices