ii Table of Contents
(Table of Contents)
2.3.2 Set Feature....................................................................................................................2-10
2.3.3 Clear Feature.................................................................................................................2-12
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 .............................................................................2-16
2.3.4.4 Get Descriptor-String .........................................................................................2-16
2.3.4.5 Get Descriptor-Other Speed Configuration ........................................................2-17
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 EZ-USB Startup Modes.................................................................................................................3-2
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 EZ-USB Response to Device Requests (RENUM=0) .................................................................3-10
3.8 EZ-USB 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
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2014-12-08
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