10.1.12 Dual Data Rate (DDR) Register
A Dual Data Rate (DDR) Register is a specialized register that capture and/or transmit data on both rising and falling edges of the clock, enabling higher data throughput.
Supported Families
The following is a list of the supported families:
- IGLOO®
- ProASIC®3
- SmartFusion®
- Fusion®
- Axcelerator®
Related Topics
Key Features
A DDR Register has the following key features:
- Parameterized for Data Width
- Choice of input buffers
- Choice of output buffers (ProASIC®3/E only)
- Choice of bidirectional
buffers (ProASIC®3/E only)
The core configurator software can generate Dual Data Rate Registers parameterized for a specific Data Width and with a choice of the type of input buffers.
In IGLOO®, ProASIC®3, SmartFusion® and Fusion devices the DDR Registers may also be combined with output buffers or bi-directional buffers.
The Bidirectional enable signal polarity (TriEN) is selectable.