OPB Central DMA Controller

Documentation

• OPB Central DMA Controller

Device Family Support

• Virtex-4 FX
• Virtex-4 LX
• Virtex-4 SX
• Virtex-II Pro
• Virtex-II
• Virtex-E
• Virtex
• Spartan-3A
• Spartan-3
• Spartan-II
• Spartan-IIE

The OPB Central DMA Controller provides simple Direct Memory Access (DMA) services for peripherals and memory devices on the On-chip Peripheral Bus (OPB). The controller moves a programmable quantity of data from a source address to a destination address without processor intervention.

Key Features

• Provides a single physical channel of DMA between source address and a destination address.
• Provides programmable registers for transfer length, source address, destination address and dataword size.
• Addresses may be set up as incrementing or non-incrementing (for supporting keyhole type memory devices).
• Byte, halfword, and word data sizes supported.
• Provides fast internal data buffer to support OPB burst transfers.