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MAC7200 Datasheet(PDF) 559 Page - Freescale Semiconductor, Inc

Part # MAC7200
Description  MAC7200 Microcontroller Family Reference Manual
PDF  976 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

MAC7200 Datasheet(HTML) 559 Page - Freescale Semiconductor, Inc

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MAC7200 Microcontroller Family Reference Manual, Rev. 2
Freescale Semiconductor
481
Chapter 27
Enhanced Direct Memory Access (DMA Channel MUX)
27.1
Introduction
The Enhanced Direct Memory Access (eDMA) controller implemented on the MAC7200 family of
devices has 16 channels, but it is possible to perform Direct Memory Accesses between considerably more
than 16 sources. The DMA Channel Mux module enables full flexibility in the assignment of DMA
channels to sources, with any source being able to be connected to any DMA channel. The DMA Channel
Mux additionally allows DMA channels 0 to 7 to be triggered either by the source, or from the
Programmable Interrupt Timers (PIT). This allows the DMA to be used to perform periodic transfers to
peripherals such as the Port Integration Module or external bus interface.
Figure 27-1. DMA Channel Mux
Table 27-1. DMA Request Sources
Peripheral
Number of DMA Channels
SPI_A
2
SPI_B
2
SPI_C
2
IIC
2
DMA
Channel
Mux
Periph #1
:
:
:
:
:
:
:
DMA Channel #0
:
:
:
:
:
:
:
DMA Channel #15
Periph #2
Periph #21
Periph #22



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