on November 14th 36

Everything You Need to Know About the LPC1769 Microcontroller

The LPC1769 microcontroller is a powerful, versatile chip designed for a wide range of applications, from electronics to automation. In this article, you’ll find everything you need to know about its features, uses, and how to get started with programming it.

Catalog

Overview of LPC1769

The LPC1769 is built on an ARM Cortex-M3 core, a design well-suited for embedded applications that demand low power and efficient processing. Operating at frequencies of up to 120 MHz, this microcontroller strikes a balance between performance and energy use. The Cortex-M3 core brings advancements like improved debugging features and enhanced integration, helping support complex applications with ease. Whether in consumer electronics, industrial automation, or small computing tasks, the LPC1769’s architecture provides a flexible foundation that can adapt to various embedded needs.

LPC1769 Pin Configuration

LPC1769 CAD Model

LPC1769 Footprint

LPC1769 3D Model

LPC1769 Specifications

Technical specifications, features, characteristics, and components with comparable specifications of NXP USA Inc. LPC1769FBD100,551

Type	Parameter
Factory Lead Time	12 Weeks
Mounting Type	Surface Mount
Package / Case	100-LQFP
Surface Mount	YES
Data Converters	A/D 8x12b; D/A 1x10b
Number of I/Os	70
ROM (word)	524288
Operating Temperature	-40°C ~ 85°C TA
Packaging	Tray
Series	LPC17xx
Published	2007
JESD-609 Code	e3
Part Status	Active
Moisture Sensitivity Level (MSL)	3 (168 Hours)
Number of Terminations	100
ECCN Code	EAR99
Terminal Finish	Tin (Sn)
HTS Code	8542.31.00.01
Terminal Position	QUAD
Terminal Form	GULL WING
Peak Reflow Temperature (Cel)	260
Supply Voltage	3.3V
Terminal Pitch	0.5mm
Time @ Peak Reflow Temperature-Max (s)	NOT SPECIFIED
Base Part Number	LPC1769
Pin Count	100
JESD-30 Code	S-PQFP-G100
Qualification Status	Not Qualified
Supply Voltage-Max (Vsup)	3.6V
Power Supplies	3.3V
Supply Voltage-Min (Vsup)	2.4V
Oscillator Type	Internal
Speed	120MHz
RAM Size	64K x 8
Voltage - Supply (Vcc/Vdd)	2.4V ~ 3.6V
uPs/uCs/Peripheral ICs Type	MICROCONTROLLER, RISC
Core Processor	ARM® Cortex®-M3
Peripherals	Brown-out Detect/Reset, DMA, I2S, Motor Control PWM, POR, PWM, WDT
Clock Frequency	25MHz
Program Memory Type	FLASH
Core Size	32-Bit
Program Memory Size	512KB 512K x 8
Connectivity	CANbus, Ethernet, I2C, IrDA, Microwire, SPI, SSI, UART/USART, USB OTG
Bit Size	32
Has ADC	YES
DMA Channels	YES
PWM Channels	YES
DAC Channels	YES
Length	14mm
Height Seated (Max)	1.6mm
Width	14mm
RoHS Status	ROHS3 Compliant

Features and Benefits of LPC1769

High-Performance Processor

The LPC1769 is built around an ARM Cortex-M3 processor, running at speeds of up to 120 MHz. This high-performance core lets you run applications smoothly and handle complex tasks efficiently, even in energy-sensitive environments.

Memory Protection Unit (MPU)

The integrated Memory Protection Unit (MPU) supports up to eight memory regions, helping you manage memory access. This feature is especially useful when working on applications that require a structured approach to memory use, helping to keep your programs secure and organized.

Advanced Interrupt Control

With the built-in Nested Vectored Interrupt Controller (NVIC), the LPC1769 efficiently handles multiple interrupts. This controller improves response times for your programs, allowing you to manage multiple tasks and events without delays. It’s particularly helpful for real-time applications, where quick responses are needed.

Application Areas for LPC1769

eMetering

The LPC1769 is well-suited for electronic metering applications, providing the reliability and processing power needed to manage data collection and analysis efficiently.

Alarm Systems

In alarm and security systems, the LPC1769’s capabilities allow it to handle multiple sensors and real-time monitoring, making it a dependable choice for security-focused applications.

Lighting

The microcontroller’s efficient power management and control features make it ideal for lighting systems, where it can handle various lighting controls, dimming, and automation functions.

White Goods

The LPC1769 can be used in household appliances, often referred to as white goods, where it contributes to tasks like motor control and user interface management, helping create more responsive and efficient appliances.

Industrial Networking

For industrial networking, the LPC1769’s processing speed and connectivity options allow it to support communication protocols and manage data across devices, making it useful in connected industrial environments.

Motor Control

In motor control applications, the LPC1769 provides precise control over motors, making it suitable for robotics, automation, and other systems that rely on accurate motor performance.

LPC1769 Application Circuit

For applications where the LPC1769 connects to a USB device, managing the voltage on the VBUS pin is important to ensure safe operation. The maximum voltage allowed on the VBUS pin is 3.6V, so one way to keep it within this limit is by using a voltage divider. This voltage divider adjusts the voltage from the USB connector to a level that works well for the microcontroller.

The voltage divider should be set so that the VBUS pin reads above 0.7 times the VDD voltage to show a logic HIGH but still stays under the 3.6V maximum. Here’s an example setup:

VBUS maximum voltage: 5.25V

VDD: 3.6V

To bring this down, you’ll want a divider that reduces the voltage to around 0.686 of its original level, which aligns it to the limits for proper operation. This setup helps the LPC1769 run smoothly and safely in USB applications.

Programming Guide for LPC1769

Getting Started with ARM Cortex M3

To begin programming with the LPC1769, you’ll need an understanding of the ARM Cortex M3 architecture, which offers a blend of performance and power efficiency. Familiarize yourself with its basic structure and functions to make the most of your programming experience.

Setting Up the Programming and Debugging Environment

Setting up a suitable environment is the first step. Using an Integrated Development Environment (IDE) like Keil MDK provides the tools necessary to write, compile, and debug your code. Ensure that all necessary software and drivers are installed for smooth operation.

Installing the Driver for CoLinkEx

For proper debugging, install the CoLinkEx driver, which allows your computer to communicate effectively with the LPC1769. This setup enables real-time debugging, helping you address issues as they arise.

Integrating the Plugin with Keil MDK

To streamline your workflow, integrate any required plugins with Keil MDK. This integration allows you to leverage additional features in the IDE, enhancing your coding and debugging process.

Register Configuration (lpc17xx.h)

The lpc17xx.h header file contains definitions and configurations specific to the LPC17xx series. Including this file in your project provides you with access to important register configurations, making it easier to manage input/output operations and system settings.

Creating a Project in Keil uVision4 for LPC1769

Using Keil uVision4, you can create a dedicated project for the LPC1769. This setup will serve as the foundation of your code, allowing you to organize and manage files related to your program efficiently.

Configuring GPIO Pins with PINSEL

The PINSEL register allows you to select and configure GPIO pins based on your project needs. With PINSEL, you can easily assign specific functions to each pin, helping control the microcontroller’s connections.

Setting Up GPIO Direction with FIODIR

The FIODIR register controls the direction of each GPIO pin. Using FIODIR, you can specify whether a pin functions as an input or output, a critical step in defining how your program interacts with the external environment.

Package Outlines for LPC1769

Manufacturer of LPC1769

NXP Semiconductors, headquartered in Eindhoven, Netherlands, is the manufacturer behind the LPC1769. Known for its focus on the automotive and secure connectivity markets, NXP supports a wide range of applications in industries worldwide. With about 31,000 employees across 35 countries and a strong engineering presence, NXP continually develops products that meet modern electronic needs, from everyday consumer devices to specialized industrial applications. The LPC1769 reflects NXP’s commitment to delivering microcontrollers that are versatile, reliable, and widely applicable across technology sectors.

Parts with Similar Specifications to LPC1769

The parts on the right have specifications similar to the NXP USA Inc. LPC1769FBD100,551

Type	LPC1769FBD100,551	LPC4078FBD100E	LPC1765FBD100,551	LPC1763FBD100,551
Manufacturer	NXP USA Inc.	NXP USA Inc.	NXP USA Inc.	NXP USA Inc.
Package / Case	100-LQFP	100-LQFP	100-LQFP	100-LQFP
Supply Voltage	3.3 V	3.3 V	3.3 V	-
Core Size	32-Bit	32-Bit	32-Bit	32-Bit
Program Memory Type	FLASH	FLASH	FLASH	FLASH
Time @ Peak Reflow Temp	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED	NOT SPECIFIED
Pin Count	100	100	100	100
Operating Temperature	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)	-40°C ~ 85°C (TA)
Packaging	Tray	Tray	Tray	Tray