LPC2148 ARM7 NXP Development Board
LPC2148 ARM7 NXP Development Board is a evaluation board for LPC2148 ARM7TMDI based micro controller. First of all we need to understand what is a development board and why we need it.
What is a Development Board
Development board is a printed circuit board with circuitry and hardware on-board to facilitate experimentation with certain micro controllers. These boards can save you from a lot of repetitive tasks. Imagine you want to work on a micro controller-based project, but to be able to use a micro controller, you have to set up a bunch of circuitry and hardware on your breadboard each time. Obviously, this is going to frustrate you, especially when there are portions that are going to be the same every time, such as the power circuit. Also, there are certain hardware circuits such as push buttons and LEDs that greatly aid in testing and debugging. Having all of the hardware and circuitry already assembled makes experimentation and general prototyping much easier.
Features LPC2148 ARM 7 NXP Development Board
The following are the features of LPC2148 ARM 7 NXP Development Board
Dimensions: 112 X 122 mm2
Two layer PCB (FR-4 material)
Power supply: DC 9V with power LED
On-board linear regulators generate +3.3V/500mA and +5v/500mA from power supply.
USB connector (as alternate power source).
This development is best suited for the people who are in the field of product development and also for the electronics engineering students who wants to have a career in product development.
LPC2148 Pro Development Board is a powerful development platform based on LPC2148 ARM7TDMI microcontroller with 512K on-chip memory. This board is powered by USB port and does not need external power supply. It is ideal for developing embedded applications involving high speed wireless communication (Zigbee / Bluetooth / WiFi), USB based data logging, real time data monitoring and control, interactive control panels etc. The on-chip USB controller provides direct high speed interface to a PC/laptop with speeds up to 12Mb/s. The UART boot loader eliminates need of an additional programmer and allows you to program using serial port. The on board peripherals include SD/MMC card interface, USB2.0 interface, 4Kbit I2C EEPROM, Xbee / Bluetooth / WiFi wireless module interface, ULN2003 500mA current sinking driver, L293D DC motor controller, 16X2 character LCD and many more. The on-chip peripherals and the external hardware on the development board are interconnected using pin headers and jumpers. The I/O pins on the microcontroller can be accessed from a 50 pin male header. This direct access to I/O pins enables you to connect your own devices very easily to the processor. The board is made from double sided PTH PCB board to provide extra strength to the connector joints for increased reliability.
Xbee / Bluetooth/ WiFi wireless module and SD/MMC card are not included with the board and it can be bought separately from Nex Robotics website.
Microcontroller: LPC2148 with 512K on chip memory
Crystal for LPC2148: 12Mhz
Crystal for RTC: 32.768KHz
50 pin Berg header for external interfacing
Wireless module adapter for 2.4GHz ZigBee (Xbee) / Bluetooth / WiFi connectivity
On board 512 bytes of I2C external EEPROM
USB Type B Connector
SD / MMC card holder with SPI interface
No separate programmer required (Program with Flash Magic using on-chip boot loader)
No Separate power adapter required (USB port as power source)
10pin(2X5) FRC JTAG connector for Programming and debugging
50 Pin Expansion header for easy access to I/O pins
On board Two Line LCD Display (2×16) (with jumper select option to disable LCD)
L293D 600mA Dual DC motor Driver
ULN2003 500mA driver
Two RS-232 Interfaces (For direct connection to PC’s Serial port)
Real-Time Clock with Battery Holder
2 Analog Potentiometers connected to ADC
TSOP1738 IR receiver
4 USER Switches
4 USER LEDs
Reset and Boot loader switches
3V button cell for on chip RTC
On Board Buzzer Interface
Schematics and Application examples in KEIL provided in the documentation CD
Can be used as main board for developing applications
1 x LPC2148 Pro Development Board
1 x DB9 Serial Cable
10 x Jumper wires
1 x USB Cable
Sample Hex Code
16-bit/32-bit ARM7TDMI-S microcontroller in a tiny LQFP64 package.
40 kB of on-chip static RAM and 512 kB of on-chip flash memory.
In-System Programming/In-Application Programming (ISP/IAP) via on-chip boot loader software.
Embedded ICE RT and Embedded Trace interfaces offer real-time debugging with the on-chip Real Monitor software and high-speed tracing of instruction execution.
USB 2.0 Full-speed compliant device controller with 2 kB of endpoint RAM.
Two 10-bit ADCs provide a total of 14 analog inputs
Single 10-bit DAC provides variable analog output
Two 32-bit timers/external event counters (with four capture and four compare channels each), PWM unit (six outputs) and watchdog.
Low power Real-Time Clock (RTC) with independent power and 32 kHz clock input.
Multiple serial interfaces including two UARTs, two Fast I²C-bus (400 kbit/s), SPI and SSP with buffering and variable data length capabilities.
Vectored Interrupt Controller (VIC) with configurable priorities and vector addresses.
Up to 45 of 5 V tolerant fast general purpose I/O pins in a tiny LQFP64 package.
60 MHz maximum CPU clock available from programmable on-chip PLL with settling time of 100 us.
On-chip integrated oscillator operates with an external crystal from 1 MHz to 25 MHz
Power saving modes include Idle and Power-down.
Individual enable/disable of peripheral functions as well as peripheral clock scaling for additional power optimization.
Processor wake-up from Power-down mode via external interrupt or BOD.
Single power supply chip with POR and BOD circuit
CPU operating voltage range of 3.0 V to 3.6 V (3.3 V +- 10 pct) with 5 V tolerant I/O pads.
Keil uVision 4 (Using Real View Compiler) – Evaluation version included in the Documentation CD
Eclipse (using YAGARTO tool chain)
FREE IEEE PAPER