Cypress Semiconductor FX2LP Informações Técnicas descarregar pdf (Página 4)

Table of Contents

(Table of Contents)

2.3.3 Clear Feature.................................................................................................................2-11

2.3.4 Get Descriptor ...............................................................................................................2-12

2.3.4.1 Get Descriptor-Device........................................................................................2-14

2.3.4.2 Get Descriptor-Device Qualifier .........................................................................2-15

2.3.4.3 Get Descriptor-Configuration .............................................................................2-15

2.3.4.4 Get Descriptor-String .........................................................................................2-16

2.3.4.5 Get Descriptor-Other Speed Configuration........................................................2-16

2.3.5 Set Descriptor................................................................................................................2-17

2.3.5.1 Set Configuration ...............................................................................................2-20

2.3.6 Get Configuration ..........................................................................................................2-20

2.3.7 Set Interface ..................................................................................................................2-21

2.3.8 Get Interface..................................................................................................................2-22

2.3.9 Set Address...................................................................................................................2-22

2.3.10 Sync Frame .................................................................................................................2-23

2.3.11 Firmware Load.............................................................................................................2-24

Chapter 3. Enumeration and ReNumeration™

3.1 Introduction ...................................................................................................................................3-1

3.2 FX2 Startup Modes .......................................................................................................................3-1

3.3 The Default USB Device ..............................................................................................................3-3

3.4 EEPROM Boot-load Data Formats ...............................................................................................3-4

3.4.1 No EEPROM or Invalid EEPROM...................................................................................3-4

3.4.2 Serial EEPROM Present, First Byte is 0xC0 ...................................................................3-5

3.4.3 Serial EEPROM Present, First Byte is 0xC2 ...................................................................3-6

3.5 EEPROM Configuration Byte........................................................................................................3-8

3.6 The RENUM Bit.............................................................................................................................3-9

3.7 FX2 Response to Device Requests (RENUM=0)........................................................................3-10

3.8 FX2 Vendor Request for Firmware Load ....................................................................................3-11

3.9 How the Firmware ReNumerates................................................................................................3-12

3.10 Multiple ReNumerations™ ........................................................................................................3-12

Chapter 4. Interrupts

4.1 Introduction ...................................................................................................................................4-1

4.2 SFRs .............................................................................................................................................4-2

4.2.1 803x/805x Compatibility ..................................................................................................4-5

4.3 Interrupt Processing......................................................................................................................4-6

4.3.1 Interrupt Masking.............................................................................................................4-6

4.3.1.1 Interrupt Priorities.................................................................................................4-7

4.3.2 Interrupt Sampling ...........................................................................................................4-8

4.3.3 Interrupt Latency..............................................................................................................4-8

4.4 USB-Specific Interrupts.................................................................................................................4-8

4.4.1 Resume Interrupt.............................................................................................................4-8

4.4.2 USB Interrupts.................................................................................................................4-9

4.4.2.1 SUTOK, SUDAV Interrupts................................................................................4-12

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