MPC8540 datasheet(820/1302 Pages) FREESCALE

820 / 1302 page

MPC8540 PowerQUICC III Integrated Host Processor Reference Manual, Rev. 1

15-42

Freescale Semiconductor

DMA Controller

•

Transparency of the bus interfaces to DMA operations

•

What is useful as opposed to what is possible. For example, it is possible to address any

internal register via the internal control bus, which means configuration and control

registers can be DMA source or destination targets. However, the typical use of DMA

functionality is to reduce host processor loading by moving large amounts of data with

minimal CPU involvement. Using a general-purpose DMA controller to load small

amounts of configuration data only makes sense in special circumstances (perhaps during

system boot, for example).

Figure 15-27. DMA Data Paths

Table 15-24 lists all of the DMA controllers (both captive and general-purpose) on the device and

the most likely DMA targets on and off-chip. The bus controllers themselves cannot initiate DMA

Three speed

OCeaN

Ethernet

controller

10/100/1G MAC

GMII

RGMII

TBI

RTBI

DDR SDRAM bus

I/O voltages supported = 2.5V

Bus speeds: 100MHz(200)/

133MHz(266)/150MHz(300)/166MHz(333)

Support 64-bit wide+ECC (error injection)

DDR SDRAM

controller

e500 core

L2 cache

Local bus

controller

Three speed

Ethernet

controller

10/100/1G MAC

PCI/PCI-X

controller

RapidIO

endpoint

Ext DMA pins

I2C

DMA

(4 channel)

controller

Boot

sequencer

control

PCI/PCI-X bus

RapidIO

I/O voltages

supported = 3.3V

Local bus

I/O voltages supported = 3.3V

Bus speeds: 66MHz/83MHz/

100MHz/133MHz/166MHz

Peripheral sizes 8/16/32-bit

e500

Coherency

Module

ECM

Open PIC

DUART

TBI

RTBI

Fast

Ethernet

controller

10/100 MAC

Serial

In/Out

MPC8540 Datasheet(PDF) 820 Page - Freescale Semiconductor, Inc

MPC8540 Datasheet(HTML) 820 Page - Freescale Semiconductor, Inc

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL