UM10360 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
User manual Rev. 3 — 19 December 2013 215 of 841
NXP Semiconductors
UM10360
Chapter 11: LPC176x/5x USB device controller
11.4 Features
• Fully compliant with the USB 2.0 specification (full speed).
• 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) by
software at run time.
• Supports SoftConnect and GoodLink features.
• Supports DMA transfers on all non-control endpoints.
• Allows dynamic switching between CPU controlled and DMA modes.
• Double buffer implementation for Bulk and Isochronous endpoints.
11.5 Fixed endpoint configuration
Table 185 shows the supported endpoint configurations. Endpoints are realized and
configured at run time using the Endpoint realization registers, documented in
Section 11.10.4 “
Endpoint realization registers”.
Table 184. USB related acronyms, abbreviations, and definitions used in this chapter
Acronym/abbreviation Description
AHB Advanced High-performance bus
ATLE Auto Transfer Length Extraction
ATX Analog Transceiver
DD DMA Descriptor
DDP DMA Description Pointer
DMA Direct Memory Access
EOP End-Of-Packet
EP Endpoint
EP_RAM Endpoint RAM
FS Full Speed
LED Light Emitting Diode
LS Low Speed
MPS Maximum Packet Size
NAK Negative Acknowledge
PLL Phase Locked Loop
RAM Random Access Memory
SOF Start-Of-Frame
SIE Serial Interface Engine
SRAM Synchronous RAM
UDCA USB Device Communication Area
USB Universal Serial Bus
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