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DS2148WZ Networked ARM7 Board

    DS2148WZ Networked ARM7 Board

    This product is discontinued.


    Untitled Document


    The DS2148WZ board combines NXP's LPC2148 ARM7 microcontroller and W5300 network chip by WIZnet Inc. When your project calls for an Ethernet or USB interface, the DS2148WZ gives you a head start in your embedded project design process. This small-factor board can be configured as a very efficient web server and still has most of the LPC2148 resources available for your application. The W5300 Ethernet Controller makes the complex task of TCP/IP packet processing and serving web pages no more difficult than working with UART. Just imagine the possibilities of having an internet appliance controlled by a 1-watt board with performance on par with "real" servers and with the advantage of having hardware features like USB, PWM, UART, I2C, SPI, AD and DA available. If you are starting a new ARM project, want to learn about ARM processors and Ethernet or just need a web server for your "coffee maker", it is the perfect board for you.


    Feature Description
    Processor LPC2148 from NXP
    • 512kbytes Flash, 32kbytes + 8kbytes RAM
    • USB 2.0 Controller, two UARTs
    • Two I2C interfaces, two SPI interfaces
    • Two 32-bit TIMERS, Watch Dog Timer, Low Power RTC
    • Two 10bit ADCs (up to 14 channels), 10bit DAC
    • PWM unit, Multilevel Interrupt System
    • 40+ Fast General Purpose I/O pins (5V tolerant)
    • ISP and IAP capabilities
    Ethernet W5300 from WIZnet
    • Hardwired TCP/IP Protocols: TCP, UDP, ICMP, Ipv4,
         ARP, IGMPv2, PPPoE Ethernet
    • 8 independent SOCKETs simultaneously
    • Internal 128kbytes memory for RX /TX buffers
    • Embedded 10BaseT/100BaseT Ethernet PHY
    • 12.000 MHz crystal (60 MHz execution with PLL)
    • 32.768 Hz crystal for RTC
    • MAX3232 with NXP bootloader support (ISP)
    • 8 kbit I2C E2PROM for storing non-volatile parameters
    • manual reset button
    • Power Supply 3.5 - 5.5 VDC or from USB port
    • Power consumption under 1 Watt
    • On board low-dropout 3.3V regulators TPS73733
    • W5300 power switchable under LPC2148 control
    • RJ45 Ethernet with magnetics
    • USB type B mini
    • DSUB-9 for RS232
    • 20 pin JTAG header
    • optional two 24 pin headers/sockets
         with P0 signals (0.1 spacing)
    • optional 2 pin header for external power supply
    Dimensions 3.7" x 1.5" (94 x 38 mm)


    Unique for this board is that the interface between LPC2148 and W5300 uses only 11 pins of P1 port, leaving all IOs of P0 with associated peripherals and interrupts ready for your application. The clear advantage over most of “micro + ethernet controller" or "micro + PHY" is the “power” and resources of LPC2148-ARM7 available for activities not related to network data processing. W5300 has its own RAM for network buffers (128kB) and processes many network packets without LPC2148 intervention. When serving pages host microprocessor has to decode "GET" and "POST" requests only.

    Software examples

    • http web server is a standalone application occupying 15kB of Flash ( less that 3% of the flash space) and 2kB of RAM. Serving 100kB/ 12 files page keeps up with browsers and in case of Chrome takes only 60ms. One of the example pages shows how to interact with a browser using a combination of java script and PHP-like functionality.
    • LPC2148 Demo Application with FreeRTOS Kernel port from http://www.freertos.org/ integrated by John C. Wren http://jcwren.com/arm/. This project covers most of LPC2148 standard peripherals used as non-trivial interfaces to LCD Display, LM75 Temperature Sensor and GPS to name only a few. It is designed as a Real-Time System with several tasks running concurrently. John utilized open source solutions from Richard Barry (FreeRTOS), Adam Dunkels (uIP), Bertrik Sikken (LPCUSB) and others. The combined result (representing probably thousands of man-hours) is really impressive and the porting to our board is only click away from your computer. You are getting full sources with "makefiles" and "batches" for FREE, while commercial Embedded RTOS can cost even thousands of dollars. We didn't use all the features/modules from original demo for we concentrated on our Ethernet support, but most of the stuff and the "frame infrastructure" is there. We added our implementation of http web server running as a low priority task. The network packet processing consumes only a small fraction of CPU capacity so that other tasks may operate in real time with maximum latency of 1ms.
    • SiteBuilder a Tcl/Tk application for converting HTML files into hex file downloadable into LPC2148 flash.

    All software for DS2148WZ board was written in plain C, compiled with an excellent FREE open source GCC and programmed to LPC2148 by FREE Serial Flash Loader.

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