5.1 Features

The QDR subsystem provides the following features:

• Integrated Hard PHY
• Supports QDR II+ and QDR II+ Xtreme interface
  • Up to 1100 Mbps data rate (550 MHz clock)
  • Separate read and write channels, supporting concurrent transactions
  • Single address channel
  • Burst of 2 and burst of 4 support (configurable)
• Configurable QDR data width (9, 18, and 36 bits)
• Configurable address width (18–22 bits)
  Important: The 22-bit address width is supported only for 18-bit data width.