spear-09-h022 STMicroelectronics, spear-09-h022 Datasheet - Page 40

• Manufacturer Part Number: spear-09-h022
• Description: Spear Head Arm 926, 200k Customizable Easic Gates, Large Ip Portfolio Soc
• Manufacturer: STMicroelectronics

DMA controller block
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DMA controller block
SPEAr Head200 has 2 DMA Controllers used to transfer data between aASIC MacroCell
and memory.
A DMA Controller can service up to 4 data streams at one time; a data transfer consists of a
sequence of a DMA data packet transfers. There are two types of a data packet transfer
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Each DMA Controller has an AHB Master interface to transfer data between DMA Controller
and either a source or a destination, and has an APB Slave interface used to program its
registers.
Functional description
Figure 7.
As a DMA requests are received, the Request Logic will arbiter between them and set the
channel request signal. When a channel request is asserted, the State Machine starts a
data transfer: first a data packet is transferred from a source to the DMA channel and then
from the FIFO to the destination.
one is from the source to the DMA Controller
one other is from DMA Controller to the destination.
DMA block diagram
SPEAR-09-H022