NXP Semiconductors LPC5500 Series Introduction Manual

AN13449
Introduction to Dual USB port on LPC5500/LPC54600 Series
Rev. 0 - 11 November 2011

1 Introduction

1.1 Dual-USB introduction

LPC4300 series, LPC54000 series, and LPC5500 series, contain the feature
called dual-USB interface. The feature helps to set the LPC portfolio apart from
its competitors. Most of these parts, such as, LPC5500 series, has High-Speed
(HS) USB and Full-Speed (FS) USB with on-chip PHY. The dual-USB parts
provide up to 480 Mbit/s throughput, which can meet high-speed data transfer
requirement for any MCU application.
Unlike the competitors with only FS USB PHY, the dual-USB parts contain both
FS and HS on-chip PHY, which can greatly reduce design complexity.
Figure 1. LPC5500 series block diagram
Contents
1 Introduction......................................1
1.1 Dual-USB introduction................. 1
1.2 USB history, standard, and speed
definition.......................................2
2 Why high-speed USB...................... 3
2.1 Lower latency in interrupt transfer
..................................................... 3
2.2 Larger packet length.................... 3
2.3 Example for USB HID mouse
application....................................4
3 Getting started with USB demo with
SDK................................................. 6
3.1 USB stack configurations.............8
3.2 Hardware connection................... 8
3.3 USB device example....................8
4 Hardware design........................... 10
5 Summary....................................... 12
6 Reference......................................12
7 Revision history............................. 12
Application Note