Overview And Features - Analog Devices ADSP-BF506F Hardware Reference Manual

Overview and Features

DMA controller behavior for the ADSP-BF50x that differs from the gen-
eral information in this chapter can be found in the section
Information for the ADSP-BF50x Processor" on page
Overview and Features
The processor uses DMA to transfer data between memory spaces or
between a memory space and a peripheral. The processor can specify data
transfer operations and return to normal processing while the fully inte-
grated DMA controller carries out the data transfers independent of
processor activity.
The DMA controller can perform several types of data transfers:
• Peripheral DMA transfers data between memory and on-chip
peripherals.
• Memory DMA (MDMA) transfers data between memory and
memory. The processor has two MDMA modules, each consisting
of independent memory read and memory write channels.
• Handshaking memory DMA (HMDMA) transfers data between
off-chip peripherals and memory. This enhancement of the
MDMA channels enables external hardware to control the timing
of individual data transfers or block transfers.

The HMDMA feature is not available for all products. Refer to
"Unique Information for the ADSP-BF50x Processor" on
page 7-103
All DMAs can transport data to and from on-chip and off-chip memories,
including L1 and SDRAM. The L1 scratchpad memory cannot be
accessed by DMA.
7-2
to determine whether it applies to this product.
ADSP-BF50x Blackfin Processor Hardware Reference
"Unique
7-103.