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EZ-USB FX2 Technical Reference Manual,
Version 2.2.
Copyright © 2000, 2001, 2002, 2003
Cypress Semiconductor Corporation.
All rights reserved.
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Cypress, the Cypress Logo, EZ-USB, Making USB Universal, Xcelerator, and ReNumeration are
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Table of Contents
Chapter 1. Introducing EZ-USB FX2
1.1 Introduction....................................................................................................................................1-1
1.2 An Introduction to USB..................................................................................................................1-1
1.3 The USB Specification ..................................................................................................................1-2
1.4 Host Is Master ...............................................................................................................................1-3
1.5 USB Direction................................................................................................................................1-3
1.6 Tokens and PIDs...........................................................................................................................1-3
1.6.1 Receiving Data from the Host..........................................................................................1-5
1.6.2 Sending Data to the Host.................................................................................................1-5
1.7 USB Frames..................................................................................................................................1-5
1.8 USB Transfer Types......................................................................................................................1-6
1.8.1 Bulk Transfers..................................................................................................................1-6
1.8.2 Interrupt Transfers ...........................................................................................................1-6
1.8.3 Isochronous Transfers.....................................................................................................1-7
1.8.4 Control Transfers............................................................................................................1-7
1.9 Enumeration..................................................................................................................................1-8
1.9.1 Full-Speed / High-Speed Detection .................................................................................1-8
1.10 The Serial Interface Engine (SIE)................................................................................................1-9
1.11 ReNumeration™........................................................................................................................1-10
1.12 EZ-USB FX2 Architecture .........................................................................................................1-11
1.13 FX2 Feature Summary..............................................................................................................1-13
1.14 FX2 Integrated Microprocessor.................................................................................................1-13
1.15 FX2 Block Diagram ...................................................................................................................1-15
1.16 Packages...................................................................................................................................1-16
1.16.1 56-Pin Package ...........................................................................................................1-16
1.16.2 100-Pin Package .........................................................................................................1-17
1.16.3 128-Pin Package .........................................................................................................1-17
1.16.4 Signals Available in the Three Packages ....................................................................1-17
1.17 Package Diagrams....................................................................................................................1-20
1.18 FX2 Endpoint Buffers ................................................................................................................1-24
1.19 External FIFO Interface.............................................................................................................1-26
1.20 EZ-USB FX2 Product Family....................................................................................................1-29
Chapter 2. Endpoint Zero
2.1 Introduction....................................................................................................................................2-1
2.2 Control Endpoint EP0....................................................................................................................2-2
2.3 USB Requests...............................................................................................................................2-5
2.3.1 Get Status........................................................................................................................2-7
2.3.2 Set Feature....................................................................................................................2-10
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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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4.4.2.2 SOF Interrupt .....................................................................................................4-13
4.4.2.3 Suspend Interrupt...............................................................................................4-13
4.4.2.4 USB RESET Interrupt ........................................................................................4-13
4.4.2.5 HISPEED Interrupt .............................................................................................4-13
4.4.2.6 EP0ACK Interrupt...............................................................................................4-13
4.4.2.7 Endpoint Interrupts.............................................................................................4-14
4.4.2.8 In-Bulk-NAK (IBN) Interrupt................................................................................4-14
4.4.2.9 EPxPING Interrupt .............................................................................................4-14
4.4.2.10 ERRLIMIT Interrupt..........................................................................................4-15
4.4.2.11 EPxISOERR Interrupt ......................................................................................4-15
4.5 USB-Interrupt Autovectors ..........................................................................................................4-15
4.5.1 USB Autovector Coding.................................................................................................4-17
4.6 I²C-Compatible Bus Interrupt.......................................................................................................4-18
4.7 FIFO/GPIF Interrupt (INT4) .........................................................................................................4-19
4.8 FIFO/GPIF-Interrupt Autovectors ................................................................................................4-20
4.8.1 FIFO/GPIF Autovector Coding.......................................................................................4-21
Chapter 5. Memory
5.1 Introduction....................................................................................................................................5-1
5.2 Internal Data RAM.........................................................................................................................5-1
5.2.1 The Lower 128.................................................................................................................5-2
5.2.2 The Upper 128.................................................................................................................5-2
5.2.3 SFR (Special Function Register) Space..........................................................................5-2
5.3 External Program Memory and External Data Memory.................................................................5-3
5.3.1 56- and 100-pin FX2........................................................................................................5-4
5.3.2 128-pin FX2 .....................................................................................................................5-4
5.4 FX2 Memory Maps........................................................................................................................5-5
5.5 “Von-Neumannizing” Off-Chip Program and Data Memory...........................................................5-8
5.6 On-Chip Data Memory at 0xE000-0xFFFF ...................................................................................5-9
Chapter 6. Power Management
6.1 Introduction....................................................................................................................................6-1
6.2 USB Suspend................................................................................................................................6-3
6.2.1 SUSPEND Register.........................................................................................................6-4
6.3 Wakeup/Resume...........................................................................................................................6-4
6.3.1 Wakeup Interrupt .............................................................................................................6-5
6.4 USB Resume (Remote Wakeup) ..................................................................................................6-6
6.4.1 WU2 Pin...........................................................................................................................6-7
Chapter 7. Resets
7.1 Introduction....................................................................................................................................7-1
7.2 Power-On Reset (POR).................................................................................................................7-2
7.3 Releasing the CPU Reset .............................................................................................................7-3
7.3.1 RAM Download................................................................................................................7-3
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