MCF5272 查看數據表（PDF） - Oxford Semiconductor

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MCF5272

Interfacing OTG243 USB Host/Function/OTG Controller to MCF5272 ColdFire Processor

Oxford Semiconductor 

TransDimension Inc.

Interfacing OTG243 to Motorola MCF5272 ColdFire Processor

Contents

1. Introduction..........................................................................................................................1

1.1 System Overview .....................................................................................................1

1.2 References................................................................................................................2

1.3 Notation....................................................................................................................2

1.4 Software ...................................................................................................................2

2. Bus Interface ........................................................................................................................3

2.1 Recommendations....................................................................................................3

2.2 Required Procedure..................................................................................................3

2.3 Hardware Design .....................................................................................................3

Operating Mode: /EXVBO and TEST ....................................................................3

Bus Control: /CS, /RD, and /WR.............................................................................4

Address Bus: A8:A2 ..................................................................................................4

Data Bus: D31:D0 .....................................................................................................4

Hardware Reset: /RESET .......................................................................................4

Interrupt: INT..........................................................................................................4

Crystal Oscillator and PLL: OSC1 and OSC2 .........................................................5

DMA: DRQ1, DACK1, EOT1, DRQ2, DACK2, and EOT2 ........................................5

Remote Wakeup: WAKEUP ....................................................................................5

External Pull-Up: RPU............................................................................................5

OverCurrent: /OC....................................................................................................6

Power On: /PO ........................................................................................................6

2.4 Software Configuration............................................................................................6

Bus Cycle Timing .....................................................................................................6

MCF5272 Chip Select Programming ......................................................................7

Software Controlled OTG243 Reset ......................................................................10

Software Controlled Remote Wakeup ....................................................................11

Interrupt: MCF5272 Configuration.......................................................................11

Interrupt: OTG243 Configuration .........................................................................12

USB System Initialization ......................................................................................12

2.5 OTG243 Access .....................................................................................................12

OTG243 Memory Map...........................................................................................12

OTG243 Register Access .......................................................................................14

OTG243 On-Chip Memory Access ........................................................................14

3. USB Port Circuits ..............................................................................................................15

3.1 OTG243 Port 2 and Port 3 .....................................................................................15

USB Signal Lines ...................................................................................................15

USB Host Power Distribution................................................................................16

3.2 OTG243 Port 1.......................................................................................................16

USB Signals ...........................................................................................................16

VBus Circuit...........................................................................................................16

Software Considerations........................................................................................16

4. Power and Ground .............................................................................................................16

5. Reference Design Schematics............................................................................................17

6. OTG243 Module for uCevolution Development Platform...............................................17

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