USB with NXP Microcontrollers

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Introduction

The Universal Serial Bus (USB) is the most-successful interface in personal computing today. Fast, reliable, and easy-to-use, you will find this interface everywhere — on personal computers, computer peripherals, monitors, mobile devices, audio and video equipment, and most other consumer electronic products.

NXP leads the market in USB-equipped ARM microcontrollers providing more than 80 options for Cortex-M4, Cortex-M3, Cortex-M0, ARM9, and ARM7 microcontrollers (see comparison table and products below). NXP's portfolio of high-speed and full-speed device/host/OTG USB-enabled microcontrollers offers special USB features (like on-chip HS PHY and ROM drivers), free software, and comprehensive support to help you move quickly from design concept to production.

• TechOnLine Rapid USB development on Cortex-M microcontrollers webinar (Sep 7, 2011)

NXP Advantages

NXP's microcontroller portfolio features the latest USB technologies, including full- and high-speed USB 2.0 device, host, and On-The-Go (OTG) functions. NXP supports all four transfer types: control, interrupt, bulk, and, in particular, isochronous, which is required for streaming audio. NXP MCUs provide designers a range of special USB features that improve overall performance and speed time-to-market:

• Fully-Certified USB Products
• On-Chip ROM Drivers
• Integrated Hi-Speed and/or Full-Speed PHY
• Free USB Host and Device Software
• Additional USB Features

Fully-Certified USB Products

NXP is a leading member of the USB-IF, the organization that maintains the USB specifications and verifies USB compliance. NXP's USB-equipped ARM MCUs are submitted for certification, so designers can be certain that their systems will deliver the best in reliability and plug-and-play operation. As of the end of 2008, most of our USB 2.0-based processors with host and device functions have been certified; the OTG function is in-process. A complete list of compliant products appears on the USB-IF web site, www.usb.org.

On-Chip USB ROM Drivers

NXP's on-board USB ROM drivers pack the entire USB stack, USB classes, and low-level drivers right into the microcontroller's ROM, eliminating the need to develop and debug this complex software yourself. Placing the USB drivers in the ROM frees up valuable memory space that you can then use for your application. These drivers have been thoroughly tested by NXP and outside test houses and are used to gain USB logo certification after passing the rigorous testing requirements at USB-IF.

Integrated Hi-Speed and/or Full-Speed PHY

A full-speed or high-speed PHY is integrated into NXP's USB microcontrollers and provides the bridge between the digital and modulated parts of the interface. The integration of the PHY on the MCU saves component cost and simplifies system design. For example, the LPC1800 and LPC4300 microcontrollers support two channels of High-Speed USB 2.0 Host/Device/OTG and have an on-chip High-Speed PHY.

Free USB Host and Device Software

USB development doesn't have to be expensive or difficult. To help you save time and money, NXP provides complete ready-to-go USB example applications for host and device modes that work out of the box on multiple tool chains — all at no charge. In addition to NXP's own complimentary USB packages, NXP partners with leading software companies to provide state-of-the-art USB firmware. For a complete list of USB software options, please see the Support section of this page.

Additional USB Features

NXP's additional USB features include the following:

• Host controllers are OHCI-/EHCI-compliant.
• Dedicated DMA lets the USB interface operate with minimal CPU intervention.
• SoftConnect™ uses software to determine when a USB device will connect to the bus.
• GoodLink™ uses an LED to indicate that a USB device has been enumerated and configured on the bus. (To save power, the LED is turned off during suspend.)
• Double-buffering maximizes throughput on bulk and isochronous endpoints.
• Multiple USB ports let devices be configured as hosts, devices, or both.
• USB data buffer provides flexible configuration of endpoint FIFO sizes.

Products

NXP offers more than 80 USB MCU options for Cortex-M0, Cortex-M3, Cortex-M4, ARM9, and ARM7 microcontrollers (see the comparison table and products below). NXP MCUs special USB features include:

Comparison Table

Core	Product	On-Chip Controller			No. of Cntrls	No. of Ports	On-chip PHY	Certified
		Device	Host	OTG
ARM7TDMI-S	LPC2141	FS	-	-	1	1	Device	FS
	LPC2142	FS	-	-	1	1	Device	FS
	LPC2144	FS	-	-	1	1	Device	-
	LPC2146	FS	-	-	1	1	Device	-
	LPC2148	FS	-	-	1	1	Device	FS
	LPC2158	FS	-	-	1	1	Device	-
	LPC2361	FS	FS	FS	1	1	Device, Host	FS
	LPC2362	FS	FS	FS	1	1	Device, Host	FS
	LPC2364	FS	-	-	1	1	Device	FS
	LPC2366	FS	-	-	1	1	Device	FS
	LPC2368	FS	-	-	1	1	Device	FS
	LPC2378	FS	-	-	1	1	Device	FS
	LPC2387	FS	FS	FS	1	1	Device, Host	FS
	LPC2388	FS	FS	FS	1	2	Device, Host	FS
	LPC2420	FS	FS	FS	1	2	Device, Host	-
	LPC2458	FS	FS	FS	1	2	Device, Host	-
	LPC2460	FS	FS	FS	1	2	Device, Host	-
	LPC2468	FS	FS	FS	1	2	Device, Host	FS
	LPC2470	FS	FS	FS	1	2	Device, Host	-
	LPC2478	FS	FS	FS	1	2	Device, Host	-
	LPC2880	HS	-	-	1	1	Device	HS
	LPC2888	HS	-	-	1	1	Device	HS
ARM720T	LH79524	FS	-	-	1	1	Device	-
	LH79525	FS	-	-	1	1	Device	-
ARM922T	LH7A404	FS	FS	-	1	3 (2 host)	Device, Host	-
	LH7A400	FS	-	-	1	1	Device	-
ARM968	LPC2921	FS	-	-	1	1	Device	-
	LPC2923	FS	-	-	1	1	Device	-
	LPC2925	FS	-	-	1	1	Device	-
	LPC2926	FS		FS	1	1	Device
	LPC2927	FS	-	FS	1	1	Device	-
	LPC2929	FS	-	FS	1	1	Device	FS
	LPC2930	FS	FS	FS	1	2	Device, Host	-
	LPC2939	FS	FS	FS	1	2	Device, Host	-
ARM926EJ-S	LPC3180/01	FS	FS	FS	1	1	-	-
	LPC3220	FS	FS	FS	1	1	-	-
	LPC3230	FS	FS	FS	1	1	-	-
	LPC3240	FS	FS	FS	1	1	-	-
	LPC3250	FS	FS	FS	1	1	-	-
	LPC3130	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC3131	HS	HS	HS	1	1	Device, Host, OTG	HS
	LPC3151	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC3152	HS	HS	HS	1	1	Device, Host, OTG	HS
	LPC3153	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC3154	HS	HS	HS	1	1	Device, Host, OTG	-
Cortex-M3	LPC1342	FS	-	-	1	1	Device	FS
	LPC1343	FS	-	-	1	1	Device	FS
	LPC1345	FS	-	-	1	1	Device	-
	LPC1346	FS	-	-	1	1	Device	-
	LPC1347	FS	-	-	1	1	Device	-
	LPC1547	FS	-	-	1	1	Device	-
	LPC1548	FS	-	-	1	1	Device	-
	LPC1549	FS	-	-	1	1	Device	FS
	LPC1751	FS	-	-	1	1	Device	FS
	LPC1752	FS	-	-	1	1	Device	-
	LPC1754	FS	FS	FS	1	1	Device, Host	-
	LPC1756	FS	FS	FS	1	1	Device, Host	-
	LPC1758	FS	FS	FS	1	1	Device, Host	-
	LPC1759	FS	FS	FS	1	1	Device, Host	-
	LPC1764	FS	-	-	1	1	Device	-
	LPC1765	FS	FS	FS	1	1	Device, Host	-
	LPC1766	FS	FS	FS	1	1	Device, Host	-
	LPC1768	FS	FS	FS	1	1	Device, Host	FS
	LPC1769	FS	FS	FS	1	1	Device, Host	-
	LPC1774	FS	-	-	1	1	Device	-
	LPC1776	FS	FS	FS	1	1	Device, Host	-
	LPC1777	FS	FS	FS	1	1	Device, Host	-
	LPC1778	FS	FS	FS	1	1	Device, Host	-
	LPC1785	FS	FS	FS	1	1	Device, Host	-
	LPC1786	FS	FS	FS	1	1	Device, Host	-
	LPC1787	FS	FS	FS	1	1	Device, Host	-
	LPC1788	FS	FS	FS	1	1	Device, Host	-
	LPC1820	HS	HS	HS	1	1	Device, Host	-
	LPC1822	HS	HS	HS	1	1	Device, Host	-
	LPC1823	HS	HS	HS	1	1	Device, Host	-
	LPC1825	HS	HS	HS	1	1	Device, Host	-
	LPC1827	HS	HS	HS	1	1	Device, Host	-
	LPC1830	HS	HS	HS	2	2	Device, Host	-
	LPC1833	HS	HS	HS	2	2	Device, Host	-
	LPC1837	HS	HS	HS	2	2	Device, Host	FS
	LPC1850	HS	HS	HS	2	2	Device, Host	FS
	LPC1853	HS	HS	HS	2	2	Device, Host	FS
	LPC1857	HS	HS	HS	2	2	Device, Host	FS
Cortex-M4	LPC4072	FS	FS	FS	1	2	Device, Host, OTG	-
	LPC4074	FS	FS	FS	1	2	Device, Host, OTG	-
	LPC4076	FS	FS	FS	1	2	Device, Host, OTG	-
	LPC4078	FS	FS	FS	1	2	Device, Host, OTG	-
	LPC4088	FS	FS	FS	1	2	Device, Host, OTG	-
	LPC4320	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC4320	HS	HS	HS	1	1	Device, Host, OTG
	LPC4322	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC4323	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC4325	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC4327	HS	HS	HS	1	1	Device, Host, OTG	-
	LPC4330	HS	HS	HS	2	2	Device, Host, OTG	-
	LPC4333	HS	HS	HS	2	2	Device, Host, OTG	-
	LPC4337	HS	HS	HS	2	2	Device, Host, OTG	-
	LPC4350	HS	HS	HS	2	2	Device, Host, OTG	-
	LPC4353	HS	HS	HS	2	2	Device, Host, OTG	-
	LPC4357	HS	HS	HS	2	2	Device, Host, OTG	-
Cortex-M0	LPC11U12	FS	-	-	1	1	Device	-
	LPC11U13	FS	-	-	1	1	Device	-
	LPC11U14	FS	-	-	1	1	Device	FS
	LPC11U23	FS	-	-	1	1	Device	-
	LPC11U24	FS	-	-	1	1	Device	LS, FS
	LPC11U34	FS	-	-	1	1	Device	-
	LPC11U35	FS	-	-	1	1	Device	-
	LPC11U36	FS	-	-	1	1	Device	-
	LPC11U37	FS	-	-	1	1	Device	FS
	LPC11U37H	FS	-	-	1	1	Device	-
Cortex-M0+	LPC11U67	FS	-	-	1	1	Device	-
	LPC11U68	FS	-	-	1	1	Device	LS, FS

Support

Software

• CMX-USB Device Stack (by CMX Systems)
• CMX-USB Host Stack (by CMX Systems)
• emUSB Device Stack (by SEGGER)
• EUSBD (Embedded USB Device) Stack (by HCC-Embedded)
• EUSBH (Embedded USB Host) Stack (by HCC-Embedded)
• I2S - USB Audio Demo (Oct 19, 2007)

• OT-USB USB Device/Host/OTG Stack (by OnChip Technologies)
• smxUSBD Device Stack (by Micro Digital)
• smxUSBH Host Stack (by Micro Digital)
• smxUSBO OTG Software (by Micro Digital)
• µC/USB Device Stack (by Micrium)
• µC/USB Host Stack (by Micrium)
• USB Audio Device Example for LPC214x (by Keil) (Feb 6, 2006)
• USB Audio Device Example for LPC23xx/LPC24xx (by Keil) (Jun 19, 2007)
• USB Device Stack (by Thesycon)
• USB Host Stack (by Thesycon)
• USB Human Interface Device (HID) Example for LPC214x (by IAR Systems) (Aug 11, 2005)
• USB Human Interface Device (HID) Example for LPC214x (by Keil) (Feb 6, 2006)
• USB Human Interface Device (HID) Example for LPC23xx/LPC24xx (by Keil) (Jun 19, 2007)
• USB Mass Storage Device Example for LPC214x (by Keil) (Feb 6, 2006)
• USB Mass Storage Device Example for LPC23xx/LPC24xx (by Keil) (Jun 19, 2007)

• Windows Embedded CE BSP for NXP LH7A404 (by Adeneo)
• Windows Embedded CE BSP for NXP LPC3180 (by Adeneo)
• Windows Embedded CE BSP for NXP LPC32x0 (by Adeneo)

Application Notes

• AN10703 NXP USB host lite V1 (Jul 14, 2008)

Articles

• ARM7 µCs Feature True Full-Speed USB (in Electronic Products) (Aug 2005)
• Cortex-M0 based MCUs have flexible USB port (in Electronic Products) (Apr 11, 2011)

Links

• USB Implementers Forum, Inc.