UM10139

Philips SemiconductorsVolume 1UM10139Chapter 14: USB Device ControllerTable 172: USB related acronyms, abbreviations and definitions used in this chapterAcronym/abbreviation DescriptionSRAMSynchronous RAMUDCAUSB Device Communication AreaUSBUniversal Serial Bus14.2 Features• Fully compliant with USB 2.0 Full Speed specification• Supports 32 physical (16 logical) endpoints• Supports Control, Bulk, Interrupt and Isochronous endpoints• Scalable realization of endpoints at run time• Endpoint Maximum packet size selection (up to USB maximum specification) bysoftware at run time• RAM message buffer size based on endpoint realization and maximum packet size• Supports Soft Connect feature and Good Link LED indicator• Supports bus-powered capability with low suspend current• Support DMA transfer with the DMA RAM of 8 kB on all non-control endpoints(LPC2146/8 only)• One Duplex DMA channel serves all endpoints (LPC2146/8 only)• Allows dynamic switching between CPU controlled and DMA modes (available onLPC2146/8 only)• Double buffer implementation for Bulk & Isochronous endpoints14.3 Fixed Endpoint ConfigurationTable 173: Pre-Fixed Endpoint ConfigurationLogical Physical Endpoint type Direction Packet size (bytes) Double bufferendpoint endpoint0 0 Control Out 8, 16, 32, 64 No0 1 Control In 8, 16, 32, 64 No1 2 Interrupt Out 1 to 64 No1 3 Interrupt In 1 to 64 No2 4 Bulk Out 8, 16, 32, 64 Yes2 5 Bulk In 8, 16, 32, 64 Yes3 6 Isochronous Out 1 to 1023 Yes3 7 Isochronous In 1 to 1023 Yes4 8 Interrupt Out 1 to 64 No4 9 Interrupt In 1 to 64 No5 10 Bulk Out 8, 16, 32, 64 Yes5 11 Bulk In 8, 16, 32, 64 Yes6 12 Isochronous Out 1 to 1023 Yes6 13 Isochronous In 1 to 1023 Yes9397 750 XXXXX © Koninklijke Philips Electronics N.V. 2005. All rights reserved.User manual Rev. 01 — 15 August 2005 195