User`s Manual - Embedded Artists
Contents
1. USB device connect USB OTG device USB host Accelerometer IrDA UART 0 and Analog Input J37 J25 J27 ISP Functionality Jil J12 Shutdown Top pos always enable Connect or Connect or J14 in order from Connect V3A Connect xyz to J22 Lower pos enable via disconnect ISP1301 disconnect signals top to bottom to VREF and AD0 0 AD0 2 P0 14 signals TxDO RxDO P2 10 RESET trimpot to analog ADO 2 Enable JTAG No Jf Jf e J6 CAN IrDA J18 J19 Connect either CAN or IrDA to P0 0 P0 1 Enable ETM J10 CAN IrDA J16 Connect P0 4 P0 5 to CAN e m O tu g ke a uc Int ext display J34 335 Select internal or external display for SPI bus and interrupt RS232 UART No of disp colors NAND Busy and LCD Enable Backlight Shutdown J20 523 J24 330 53 1 132 Ethernet PHY J33 J29 Connect RS232 All to left 16 bit J7 Enable power Inserted Shutdown interface to UART 1 or color interface to Top Connect Nand busy switch to backlight RxD TxD on UART 2 display signal to P2 2 display Open Enable All to right 24 bit backlight control color interface Bottom Connect Ethernet PHY PD signal to P2 19 Figure 3 QVGA Base Board Jumpers Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 21 4 3 1 Default Jumper Po2. Sound video and game iy System devices Universal Serial Bus con Scan for hardware change SS a Opens property sheet for the current selection property sheet for the current selection Figure 12 Device Manager Port Dialog Set 115200 or 38400 bits per second 8 data bits none parity 1 stop bit and none flow control as illustrated in Figure 13 below Select 115200 bps is connecting to the demo program and 38400 if working with uClinux Then select Advanced settings Please note that different application programs Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 32 can use different baudrate settings for the serial channel Other baudrates can also be used depending on your specific application USB Serial Port COM3 Properties General Port Settings Driver Details Bits per second Data bits fp St iS r _ _ Stop bits ooo YS UART settings Advanced Restore Defaults Advanced settings Figure 13 USB Serial Port Properties Dialog Set the desired COM port number under the Advanced settings dialog NXP s FLASH Utility program for ISP program download needs for example a COM port number between 1 and 5 Very often the COM port number selected but the USB Serial Port is higher than this so this needs to be changed manually It is common that all COM ports with low numbers are listed as occupied
3. 10 An Introduction to the GNU Compiler and Linker by Bill Gatliff http www billgatliff com 11 LPC2000 Yahoo Group A discussion forum dedicated entirely to the Philips LPC2xxx series of microcontrollers http groups yahoo com group lpc2000 12 The Insider s Guide to the NXP LPC2300 2400 Based Microcontrollers by Trevor Martin http Avww hitex co uk download docs lpc2300 con reg download pc2300 book htm Especially note document 3 There exist a number of bugs in the processor that is important to be aware of Note that there can be newer versions of the documents than the ones linked to here Always check for the latest information version Copyright 2011 Embedded Artists AB
4. LPC2478 Developer s Kit User s Guide Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Get Up and Running Quickly and Start Developing Your Applications On Day 1 W Embedded Artists EA2 USG 0801 Rev LPC2478 Developer s Kit User s Guide Page 2 Embedded Artists AB Davidshallsgatan 16 211 45 Malmo Sweden info EmbeddedaArtists com http www EmbeddedArtists com Copyright 2005 2011 Embedded Artists AB All rights reserved No part of this publication may be reproduced transmitted transcribed stored in a retrieval system or translated into any language or computer language in any form or by any means electronic mechanical magnetic optical chemical manual or otherwise without the prior written permission of Embedded Artists AB Disclaimer Embedded Artists AB makes no representation or warranties with respect to the contents hereof and specifically disclaim any implied warranties or merchantability or fitness for any particular purpose Information in this publication is subject to change without notice and does not represent a commitment on the part of Embedded Artists AB Feedback We appreciate any feedback you may have for improvements on this document Please send your comments to support EmbeddedArtists com Trademarks All brand and product names mentioned herein are trademarks services marks registered trademarks or registered service marks of th
5. automatic ISP jumpers are open and that the RX TX jumpers are closed as in the picture above 6 Start a terminal program and connect to the new COM port 7 Press the reset button lower left corner of the QVGA Base Board and observe the system console output in the terminal program window 5 3 Getting Started with uClinux There is a uClinux port for the board In order to get started the system has to be prepared for running uClinux The first step is to download the uBoot bootloader into the LPC2478 internal flash memory This can be downloaded either via ISP or via the JTAG interface The uBoot bootloader hex file can be downloaded from the board s support page This guide is just a quick guide you get to take the first step and start using the board More detailed information can be found on the board s support page 5 3 1 Basic Requirements This is a list of what you need to have before you start e A Windows PC with an Internet browser e g Internet Explorer or Firefox a Telnet client a FTP client and or a SSH client A Windows PC has Internet Explorer a Telnet and a FTP client as default e A suitable terminal program e An Ethernet cable LAN cable to connect the board to your PC a crossed cable if direct connection to the PC or a normal cable if connected to a switch or hub e Optionally a power supply 9 15V DC 2 Amp A 2 1mm standard power plug is used Any polarity Only needed if USB Host shall drive h
6. but test to change to a low number anyways Very often it s no problem at all to do this Advanced Settings for COM3 AC COM Port COM Port Number Com Number Setting Tenma m USB Transfer Sizes Cancel Select lower settings to correct performance problems at low baud rates Select higher settings for faster performance Defaults Receive Bytes 4096 X Transmit Bytes 4096 v BM Options m Miscellaneous Options Select lower settings to correct response problems Serial Enumerator Serial Printer Latency Timer msec 16 Cancel If Power Off Timeouts Event On Surprise Removal Set RTS On Close Minimum Read Timeout msec 0 v Disable Modem Ctl At Startup Minimum Write Timeout msec 0 Se Figure 14 Advanced USB Serial Port Properties Dialog Finally it s time to test if you have successfully installed and configured the USB Serial Port Start a terminal program Connect to the correct COM port with 38400 bits per second 8N1 no flow control Remember to not have the USB ISP jumpers inserted Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 33 A message like below should be printed on the terminal Please note that the picture below is just an example of the uClinux startup console LPC 2xxx gcc newlib v2 1 0 0 Ipc2 lisp termonly U BOOT HEX com5 38400 12000 RAMDISK ronfs fi gexecen ound at block 6 RAMDISK Loading 2253 blocks 1 disk
7. external memory devices etc to the LPC2478 OEM Board Study this schematic also found in this document for details 3 4 LPC2478 OEM Board Mechanical Dimensions and Connector Figure 1 below contains a drawing of the board that includes mechanical measures See SODIMM 200 standard for exact measures 1 8V keying is used SODIMM 200 boards are either 1 8V or 2 5V keyed This is how the 32 bit databus versions look like 1 8V keying of SODIMM board Figure 1 LPC2478 OEM Board Mechanical Dimensions 32 bit databus version shown The SODIMM 200 format is a standard and there exist many connectors that are suitable form many different manufactures The many sources also keep the connector cost very low Note that the connector should be 1 8V keyed Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 14 One suitable connector is 0 1473005 4 from Tyco AMP Basically any SODIMM DDR2 200pos 1 8V right angled connector will do 3 5 Known Limitation of LPC2478 OEM Board 3 5 1 Ver 1 0 SDRAM Clock Frequency There is one known limitation of the LPC2478 OEM Board The cpu core clock frequency must not exceed 48 MHz when using the external SDRAM This limitation only applies to v1 0 boards with 32 bit external databus width Boards with 16 bit databus can run at full speed On v1 0 of 16 bit boards there is a small modification on the boards On all v1 1 boards 16 and 32 bit this limitation is
8. 200 pos 0 6mm pitch expansion connector SODIMM 200 format 3 2 Memory Layout The external memory controller on the LPC2478 defines eight memory regions named CS0 CS1 CS2 CS3 DYCSO DYCS1 DYCS2 and DYCS3 Of these eight three memory areas are used by the LPC2478 OEM Board These are e CSO address range 0x8000 0000 0x80FF FFFF An external NOR FLASH 32 MBit 4 MByte in size is addressed e CS1 address range 0x8100 0000 0x81FF FFFF An external NAND FLASH 1 GBit 128 MByte in size is addressed e DYCSO address range 0xA000 0000 OxAFFF FFFF An external SDRAM 256 MBit 32 MByte in size is addressed These three memory regions cannot be used by external devices CS2 and DYCS1 are however free for external use via the buffered memory interface Both address and data busses are buffered 3 3 Usage of CPU Pins Almost all pins of the LPC2478 are directly available on the expansion connectors Only in a few cases are pins used for dedicated functionality like Ethernet interface and chip select signals Such pins are not available on the expansion connector The table below lists all pins and their possible restrictions via a buffer P2 18 P2 20 P2 24 No used as CLKOUTO DYCS0 CKEO for external SDRAM P2 28 P2 29 Yes but used as DQM0 DQM1 for external SDRAM and only available as outputs via a buffer P2 30 P2 31 Yes but used as DQM2 DQM3 on 32 bit
9. Base Board is connected to the PC via an USB cable the PC will ask for a driver Unpack unzip the downloaded driver file and browse to the position of the driver files After successful driver installation a COM port will be created Before communication with the Board can take place the UART settings must be correctly set The following description is valid for Windows XP but other operating systems have similar dialog windows See the USB driver documentation for details if needed To change UART settings first open the System Properties dialog as illustrated in the figure below System Properties System Restore Automatic Updates Remote General Computer Name Hardware Advanced Device Manager The Device Manager lists all the hardware devices installed on eS your computer Use the Device Manager to change the properties of any device Device Manager Drivers Par Driver Signing lets you make sure that installed drivers are A compatible with Windows Windows Update lets you set up how Windows connects to Windows Update for drivers Driver Signing Windows Update Hardware Profiles F Hardware profiles provide a way for you to set up and store different hardware configurations Hardware Profiles Figure 10 System Settings Dialog Then select the Device Manager and then open the Ports list as illustrated in Figure 11 below Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit U
10. LPC2478 OEM board is classified as a component and is hence not CE marked separately It can perform different functions in different integrations and it does not have a direct function It is therefore not in the scope of the CE Directive An end product where an OEM Board is integration into is however very likely to need CE marking 2 6 Other Products from Embedded Artists Embedded Artists have a broad range of LPC1000 2000 3000 4000 based boards that are very low cost and developed for prototyping development as well as for OEM applications Modifications for OEM applications can be done easily even for modest production volumes Contact Embedded Artists for further information about design and production services 2 6 1 Design and Production Services Embedded Artists provide design services for custom designs either completely new or modification to existing boards Specific peripherals and I O can be added easily to different designs for example communication interfaces specific analog or digital I O and power supplies Embedded Artists has a broad and long experience in designing industrial electronics in general and with NXP s LPC1000 2000 3000 4000 microcontroller families in specific Our competence also includes wireless and wired communication for embedded systems For example IEEE802 11b g WLAN Bluetooth ZigBee ISM RF Ethernet CAN RS485 and Fieldbuses Copyright 2011 Embedded Artists AB LPC2478 Develo
11. LPC2478 via the RMII interface The PHY is driven by an external 50 MHz clock that is also feed to the LPC2478 This is part of the RMIl interface specification The PHY is always enables can be disabled under program control but have an external power down signal that can be used by an external device There is also an interrupt signal from the PHY that can be used to signal link events like connect disconnect of a cable Neither the power down nor the interrupt signal is used by the LPC2478 OEM Board but the signals are available on the expansion connector If the signals are not used just leave them unconnected Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 11 3 1 5 External Memories There are three external memory chips connected to the external memory bus interface of the LPC2478 Both 32 bit and 16 bit databus width versions of the board exist e An external NOR FLASH 32 MBit 4 MByte in size addressed by CSO address range 0x8000 0000 0x80FF FFFF Accessed via 16 bit databus e An external NAND FLASH 1 GBit 128 MByte in size addressed by CS1 address range 0x8100 0000 0x81FF FFFF Accessed via 8 bit databus e Anexternal SDRAM 256 MBit 32 MByte in size addressed by DYCSO address range 0xA000 0000 OxAFFF FFFF Accessed via 32 bit or 16 bit databus dependent on board version The NAND FLASH has an optional busy output that can be used for controlling the
12. Make sure your PC does not have the IP address 192 168 0 100 but any other IP address in the range 192 168 0 X where X is 1 99 101 254 will do Some valid IP addresses for your PC are for example 192 168 0 2 192 168 0 3 or 192 168 0 200 Now it s time for the first test Connect the Ethernet cable and power up the board Make sure the PC and the LPC2478 OEM Board are in the same IP subnets An easy way to test if Ethernet IP communication function properly is to ping the board From a command prompt window type ping 192 168 0 100 Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 30 Note the green LEDs on the Ethernet connector of the QVGA Base Board that flash every time an Ethernet frame is received You should be able to see the LED flash at the same rate as the ping packages are sent Other communication on your Ethernet network might make the LED flash much faster than this 5 4 FTDI USB Driver Installation A USB driver must be installed on your PC computer in order for the USB to UART chip FT232R to function Make sure to download the latest version of the driver which can be found at the following URL http www ftdichip com Drivers VCP htm Search for a FT232R driver for your operating system Also see FTDI s installation guides for details how to install the driver for different operating systems http www ftdichip com Support Documents InstallGuides htm When the QVGA
13. The microcontroller can be placed in a very low power mode while the RTC operates and keeps track of time Power for the RTC during these low power modes comes from the VBAT input pin Power is sourced either from the 3 3V power supply or the external VBAT_IN signal available on the expansion connector depending on which one have highest voltage 3 1 2 Powering There is no internal power supply on the board The LPC2478 contains an internal DC DC converter to generate the internal 1 8V power needed by the core The LPC2478 OEM Board module must be powered by a single external 3 3V power supply The supply must be stable and should have at least four 22uF bulk capacitor s close to the power pins on the expansion connectors 3 1 3 Analog Inputs Outputs The LPC2478 contains analog peripherals that need a reference voltage which is supplied from the VREF input pin This reference voltage must be supplied externally can be the VDDA power which is a filtered 3 3V power supply The VDDA power is available on the expansion connector under the name V3A See schematic for details A filtered version of analog ground is also available under the name VSSA 3 1 4 Ethernet Interface The LPC2478 have an internal Ethernet MAC peripheral with interface to an external PHY i e the analog interface to an Ethernet interface Page 2 of the schematic contains the Ethernet PHY The DP83848 external Ethernet PHY from National is used and interfaces the
14. active low to be used for USB device OTG P1 19 No special usage on QVGA Base Board P1 20 LCD databit 10 P1 21 LCD databit 11 P1 22 LCD databit 12 P1 23 LCD databit 13 P1 24 LCD databit 14 P1 25 LCD databit 15 P1 26 LCD databit 20 P1 27 LCD databit 21 can also be connected to ISP1301 USB OTG transceiver P1 28 LCD databit 22 can also be connected to ISP1301 USB OTG transceiver P1 29 LCD databit 23 can also be connected to ISP1301 USB OTG transceiver P1 30 Can be connected to VBUS signal from USB host power P1 31 Can be connected to over current error signal from USB host power switch P2 0 LCDPWR signal power enable for QVGA display Also connects to ETM pads if connector mounted P2 1 LCDLE signal Not used by design Also connects to ETM pads if connector mounted P2 2 LCDDCLK signal dot clock for QVGA display Also connects to ETM pads if connector mounted Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 18 P2 3 LCDFP signal vsync for QVGA display Also connects to ETM pads if connector mounted P2 4 LCDENAB signal data enable for QVGA display Also connects to ETM pads if connector mounted P2 5 LCDLP signal hsync for QVGA display Also connects to ETM pads if connector mounted P2 6 LCD databit 4 Also connects to ETM pads if connector mounted P2 7 LCD databit 5 Also connects to ETM pads if connector mounted P2 8 LCD dat
15. fixed in the design i e the boards can run at full 72MHz Normally the internal PLL frequency is set to 288 MHz the external 12 MHz crystal frequency multiplied by 24 Dividing 288 MHz with 6 gives a core frequency of 48 MHz and dividing with 4 gives 72 MHz The limitation results in a maximum cpu clock frequency of 48 MHz when using the external SDRAM If the SDRAM is not used the cpu core frequency can be up to full specification of the LPC2478 3 5 2 Ver 1 0 Ethernet Clock Due to an error in clock routing between the Ethernet PHY and the LPC2478 rev 1 0 boards have been modified slightly The error is also temperature dependent Only a small number of ver 1 0 boards have been shipped without this modification and these boards were tested not to have any problems The picture below illustrates the modification made The problem is fixed on ver 1 1 boards W S S O Pin 25 of the Ethernet PHY has been lifted and removed A short wire has been soldered to the 50 MHz oscillator output 3 The wire is soldered in the other end to the pad of the removed Ethernet PHY pin Figure 2 LPC2478 OEM Board Ethernet Clock Modification 3 5 3 NAND FLASH Bad Block The NAND Flash is the K9F1G08U0A from Samsung and contains 1G bit with a spare 32M bit capacity The chip may include invalid blocks when shipped from factory A maximum of 20 invalid blocks may exist initially i e 1004 1024 valid blocks Additional invalid b
16. reset button is often required in order to startup the board it can be placed in bootloader mode during startup due to RTS DTR signal handling by the USB driver during startup Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 34 6 Further Information The LPC2478 microcontroller is a complex circuit and there exist a number of other documents with a lot more information The following documents are recommended as a complement to this document 1 NXP LPC2478 Datasheet http ics nxp com products lpc2000 datasheet pc2478 pdf 2 NXP LPC2478 User s Manual http ics nxp com support documents microcontrollers pdf user manual lpc24xx pdf 3 NXP LPC2478 Errata Sheet http ics nxp com support documents microcontrollers pdf errata lpc2478 pdf 4 ARM7TDMI Technical Reference Manual Document identity DDI0029G http www arm com pdfs DDI0029G_7TDMI_R3_trm pdf 5 ARM Architecture Reference Manual Document identity DDIO100E Book Second Edition edited by David Seal Addison Wesley ISBN 0 201 73719 1 Also available in PDF form on the ARM Technical Publications CD 6 ARM System Developer s Guide Designing and Optimizing System Software by A N Sloss D Symes C Wright Elsevier ISBN 1 55860 874 5 7 Embedded System Design on a Shoestring by Lewin Edwards Newnes ISBN 0750676094 8 GNU Manuals http Awww gnu org manual 9 GNU ARM tool chain for Cygwin http www gnuarm com
17. s Guide Page 4 5 1 Demo Applications 24 5 1 1 Custom Slideshow Demo Application 3 24 5 2 Initial Setup and Powering 26 5 3 Getting Started with uClinux 28 5 3 1 Basic Requirements 28 5 3 2 LAN Ethernet Setup 28 5 4 FTDI USB Driver Installation 30 5 4 1 USB Driver Behavior 33 6 Further Information 34 Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 5 1 Document Revision History Revision Date Description A G 2007 2010 Earlier versions of document H 2010 12 10 Updated manual according to new template Removed schematics from document Added known issue with newer SD MMC memory cards requiring pull up resistors 2011 12 19 Added note about CE marking Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 6 2 Introduction Thank you for buying Embedded Artists LPC2478 Developer s Kit based on NXP s ARM7TDMI S LPC2478 microcontroller This document is a User s Guide that describes the LPC2478 OEM Board both 16 and 32 bit data bus versions and the QVGA Base Board hardware design It is the User s Manual for both the LPC2478 Developer s Kit as well as for just the LPC2478 OEM Board There is a separate document describing program development for the LPC2xxx series in general with Embedded Artists QuickStart Build Environment 2 1 Features Embedded Artists LPC2478 OEM Board with NXP s ARM7TDMI S LPC2478 microcontrol
18. BLSO buffered signal from cpu board No special usage on QVGA Base Board P4 27 BLS1 buffered signal from cpu board No special usage on QVGA Base Board P4 28 LCD databit 2 P4 29 LCD databit 3 VBAT 0 33F backup cap on vbat signal ALARM Connected to alarm LED active high VREF Can be connected VDDA V3A VDDA Used to generate reference voltage for trimpot analog inputs VSSA JTAG signals Connected to standard 20 pos 2x10 pin JTAG connector JTAG Enable jumper also exists RESET Connects to RESET push button and USB to serial bridge for automatic ISP functionality RSTOUT Connects to RESET LED indicator Used to reset PCA9532 and QVGA display 4 2 Known Limitation of QVGA Base Board 4 2 1 Version 1 0 1 1 SD MMC Interface Pullups Newer SD MMC memory cards require pull ups 10 100Kohm on the five data and command signals Version 1 2 of the QVGA Base Board has these five pull up resistors but version 1 0 and version 1 1 do not In case of problems with the interface it is recommended to add pull up resistors See version 1 2 schematic for details Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 20 4 3 Jumpers The QVGA Base Board has a number of jumpers in order to be able to connect disconnect and fully utilize all functionality of the LPC2478 and the boards Figure 3 illustrates all jumpers and explains to what part of the design they belong
19. abit 6 Also connects to ETM pads if connector mounted P2 9 LCD databit 7 Also connects to ETM pads if connector mounted P2 10 Connected to push button for enabling bootloader during reset or EINTO input Also connects to LED active low Connects to USB to serial bridge for automatic ISP functionality P2 11 LCDCLKIN an external clock signal can be feed to this pin P2 12 LCD databit 18 P2 13 LCD databit 19 P2 14 Can connect as enable signal for IrDA transceiver active low P2 15 Can connect to interrupt signal from touch screen controller P2 19 Can be connected to Ethernet PHY interrupt output P2 21 Can be connected to NAND FLASH busy output P2 22 Connects to joystick switch P2 23 Connects to joystick switch P2 25 Connects to joystick switch P2 26 Connects to joystick switch P2 27 Connects to joystick switch P2 30 Can control sensitivity of accelerometer cannot be used on 32 bit databus versions P2 31 Can control sensitivity of accelerometer cannot be used on 32 bit databus versions P3 0 P3 15 Occupied for 16 bit databus versions No special usage on QVGA Base Board P3 16 P3 31 Also occupied for 32 bit databus versions No special usage on QVGA Base Board P3 16 Can be connected to RS232 interface if 16 bit databus version used P3 17 Can be connected to RS232 interface if 16 bit databus version used P3 18 Can be connected to RS232 interface if 16 b
20. boards where the LPC2478 has CRP3 enabled It s the user s responsibility to not invoke this mode by accident 2 5 CE Assessment The LPC2478 Developers Kit consisting of the LPC2478 OEM Board and QVGA Base Board is CE marked See separate CE Declaration of Conformity document The LPC2478 Developers Kit is a class A product In a domestic environment this product may cause radio interference in which case the user may be required to take adequate measures EMC emission test has been performed on the LPC2478 Developers Kit Standard interfaces like Ethernet USB serial have been in use General expansion connectors where internal signals are made available for example processor pins have been left unconnected Connecting other devices to the product via the general expansion connectors may alter EMC emission It is the user s responsibility to make sure EMC emission limits are not exceeded when connecting other devices to the general expansion connectors of the LPC2478 Developers Kit Due to the nature of the LPC2478 Developers Kit an evaluation board not for integration into an end product fast transient immunity tests and conducted radio frequency immunity tests have not been executed Externally connected cables are assumed to be less than 3 meters The general expansion connectors where internal signals are made available do not have any other ESD protection than from the chip themselves Observe ESD precaution Note that the
21. ctor with all cpu signals Ethernet connector RJ45 Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 7 CAN interface amp connector MMC SD interface amp connector JTAG connector Pads for ETM connector e Interfaces USB OTG interface amp connector USB host interface amp connector Full modem RS232 on UART 1 cannot be used on 32 bit databus cpu boards but RxD2 TxD2 can alternatively be connected to the RS232 interface Dual CAN interface amp connector IrDA transceiver interface e Power Power supply either via USB or external 9 15V DC 0 3F capacitor backup power for RTC and LED on ALARM output on LPC2478 e Other 5 key joystick 3 axis accelerometer 5 push button keys four via I2C and one on P2 10 9 LEDs 8 via 12C and one on P2 10 Analog input USB to serial bridge on UART 0 FT232R and ISP functionality Reset push button and LED Speaker output on DAC output from LPC2478 250x150 mm in size 2 2 ESD Precaution Please note that the LPC2478 OEM Board and QVGA Base Board come without any case box and all components are exposed for finger touches and therefore extra attention must be paid to ESD electrostatic discharge precaution Make it a habit always to first touch the metal surface of one of the USB or Ethernet connectors for a few seconds with both hands before touching A any
22. data bus version P3 0 P3 15 Yes but used as data bus and only available via data bus buffer P3 16 P3 31 Yes On 32 bit data bus versions these pins are used for upper 16 bits of the data bus and are only available via the data bus buffer Pin Available on expansion connector P0 0 P0 26 Yes P0 27 P0 28 Yes but 12C E2PROM connected to these pins P0 29 P0 31 Yes USBB Yes P1 0 P1 1 No connected to Ethernet P1 4 PHY P1 8 P1 10 P1 14 P1 17 P1 2 P1 3 Yes P1 5 P1 7 P1 11 P1 13 P1 18 P1 26 P1 31 P2 0 P2 15 Yes P2 19 P2 21 P2 23 P2 25 P2 27 P2 16 P2 17 Yes but used as RAS CAS and only available as outputs P4 0 P4 23 Yes but used as address bus and only available as outputs via buffers Copyright 2011 Embedded Artists AB P4 24 P4 27 Yes but used as LPC2478 Developer s Kit User s Guide Page 13 OE WE BLSO BLS1 and only VDDA connected to 3 3V power available as outputs via a VSSA supply buffer X1 X2 No directly connected to on P4 26 P4 29 Yes RTCX1 board crystals P4 30 P4 31 No used as CS0 CS1 for RTCX2 external NOR NAND FLASH memories JTAG signals Yes VBAT Yes via forward diode RESET Yes ALARM Yes PATIOR VREF Yes Note that VDDA is The QVGA Base Board illustrates how to typically connect external interfaces like Ethernet USB
23. eavy external load not needed for smaller external USB host loads like keyboards and memory sticks 5 3 2 LAN Ethernet Setup Figure 9 below illustrates how to connect the QVGA Base Board to your PC via Ethernet Either directly the red cable or via an Ethernet switch hub the blue cable The red cable is a crossed Ethernet cable and the blue is a normal cable The uClinux Ethernet driver of the LPC2478 OEM Board can automatically detect the type of cable and act accordingly so different cables are not strictly needed Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 29 Your PC Switch Figure 9 Ethernet LAN Cable Connection The Ethernet cable should be connected during powerup Else there will be a long timeout delay where the board waits for a valid Ethernet link The default network configuration of the LPC2478 OEM Board is IP address 192 168 0 100 Netmask 255 255 255 0 Default gateway 192 168 0 1 Nodes on an IP network can communicate directly with each other if they are on the same LAN i e Ethernet network and is on the same IP subnet This means that the LPC2478 OEM Board must be on the same IP subnet as your PC An IP address starting with 192 168 0 x is a common IP subnet for many PCs If this does not match your PC either change the IP address of your PC or change the IP address of the LPC2478 OEM Board see description of this at the last section of this page
24. eir respective owners and should be treated as such Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 3 Table of Contents 1 Document Revision History 5 2 Introduction 6 2 1 Features 6 2 2 ESD Precaution 7 2 3 General Handling Care 7 2 4 Code Read Protection 8 2 5 CE Assessment 8 2 6 Other Products from Embedded Artists 8 2 6 1 Design and Production Services 8 2 6 2 OEM Education QuickStart Boards and Kits 9 3 LPC2478 OEM Board Design 10 3 1 LPC2478 OEM Board Schematics 10 3 1 1 CPU 10 3 1 2 Powering 10 3 1 3 Analog Inputs Outputs 10 3 1 4 Ethernet Interface 10 3 1 5 External Memories 11 3 1 6 External Memory Interface 11 3 1 7 Reset Generation 11 3 1 8 12C E2PROM 11 3 1 9 Expansion Connectors 12 3 2 Memory Layout 12 3 3 Usage of CPU Pins 12 3 4 LPC2478 OEM Board Mechanical Dimensions and Connector 13 3 5 Known Limitation of LPC2478 OEM Board 14 3 5 1 Ver 1 0 SDRAM Clock Frequency 14 3 5 2 Ver 1 0 Ethernet Clock 14 3 5 3 NAND FLASH Bad Block 14 3 5 4 Brand of Memory Chips 15 4 QVGA Base Board Design 16 4 1 Usage of CPU Pins 16 4 2 Known Limitation of QVGA Base Board 19 4 2 1 Version 1 0 1 1 SD MMC Interface Pullups 19 4 3 Jumpers 20 4 3 1 Default Jumper Positions 21 4 3 2 Illegal Jumper Combinations 21 4 4 Connectors 22 44 1 Mictor 38 ETM Connector 22 4 5 Important Components 23 5 Getting Started 24 Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User
25. erase program operations with better precision The signal is available on the expansion connector If needed the signal can be routed to a suitable i e free input pin The busy status of the chip is also available under software control 3 1 6 External Memory Interface The LPC2478 memory interface is available on the expansion connector The data bus width is either 16 or 32 bits on the external interface depending on board version All signals are buffered The buffers are disabled unless enabled by external signals By pulling signal ABUF_EN low the two buffers for address and control signals are enabled and act as outputs from the LPC2478 OEM Board The data bus buffer is controlled by the signal DBUS_EN By pulling this signal low the data bus buffer is enabled The LPC2478 signal OE controls the direction of the data bus buffer During read operations the buffer acts as an input and during write operations it acts as an output Note that DBUS_EN must not be pulled low constantly In that case the buffer will collide with the board s internal data bus DBUS_EN must only be pulled low when an external memory IO device is accessed If for example CS2 is used to decode and access an external device connect the signal CS2 directly to DBUS_EN If more than one chip select signal is used logically AND all chip select signal together before driving the DBUS_EN signal If the external memory interface is not used leave ABUS_EN a
26. fic format as described below The file should be named custom txt and be placed in a folder named romfs_override slideshow on the memory card The romfs_override part of the path will be ignored by the demo application and the contents of the folder will be considered as root E g romfs_override test myfile gif should be referenced from within the slideshow file as test myfile gif The demo application supports omp jog and png images All images must be 240x320 in size Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 25 Below is a sample text file for defining a slide show It demonstrates how a typical slide show presentation is created Short sequence of images clear load slideshow test 05 jpg 0 show 0 none load slideshowltest 29 jpg 1 load slideshow test 30 jpg 2 wait 1500 label 0 show 1 explode_v wait 1500 show 2 left right wait 1500 show 0 blinds wait 1500 goto 0 Some comments about the syntax of the text file Whitespaces at the beginning or end of a row are ignored Lines starting with the sign are considered comments and are skipped There is a limit to a maximum of 80 commands in the slideshow file Each non comment line must contain exactly one command No more than 40 images may be loaded at the same time The available commands are e load lt filename gt lt slot gt Loads the image file into memory in the specified slot T
27. he different features of the LPC2478 cpu and the LPC2478 Developer s Kit The applications are Short slide show presenting the LPC2478 and the board 2 Three colorful pictures demonstrating the capabilities of the display 3 Aplaceholder for slide shows on an external SD MMC memory card 4 USB Host application where a USB keyboard can be attached to the board 5 3D graphic demonstration involving a rotating cube 6 Another 3D graphic demonstration involving a rotating globe 7 o Jawbreaker game Rolling and bouncing ball controlled by an accelerometer TCP IP statistics and setting of IP address Touch screen calibration About information Example game with falling cubes 10 11 12 Select which demo application to start by tapping on the screen i e via the touch screen interface or moving around with the joystick switch Please note that source code is not available for the demo applications The demo illustrates the capabilities of the processor and Embedded Artists as a software provider See our sample application package for sample source code which can be downloaded from our support page 5 1 1 Custom Slideshow Demo Application 3 It s possible to create own slide shows with demo application 3 The pictures are stored on a MMC SD memory card inserted in the MMC SD memory card connector on the QVGA Base Board The slideshow is defined in a text files with a speci
28. he slot number is zero indexed and there are 40 slots Remember that each loaded image will occupy 230x320x3 bytes of RAM e clear Clears the screen by setting all pixels white e label lt name gt Creates a label that can be referenced from goto commands The label does not have to appear before the first goto command that references it The name can be any string but it should not contain spaces and it must be unique e goto lt label gt Causes a jump in the execution The next command to be executed will be the line immediately following the specified label command e wait lt milliseconds gt Causes a delay of the specified number of milliseconds before the next command is executed The load command can be executed without affecting the wait time Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 26 This example assumes it takes 250ms to load an image By placing the load commands before the wait command the load times will be deducted from the delay label a load myimg0 gif 0 load myimg1 gif 1 load myimg2 gif 2 load myimg3 gif 3 label b wait 2000 label c The time between label a and b will be roughly 1000ms The time between label a and c will be roughly 2000ms e show lt slot gt lt transition gt Replaces the current image with the one stored in the specified slot There are a number of effects to apply when transitioning from the old image to the
29. into ram disk done JFS Mounted root Cronfs filesysten readonly Por further information check ttp www uc linux org Board specific drivers by Embedded Artists AB ttp wew Enbeddedfrtists con Release 2007 02 25 Check for updates sing drivers lpc2468eth ko p gt d MAC address in u boot env 08 d8 93 08 12 41 mac MAC address 66 d6 93 0 12 41 sing drivers lpc246B8manc ko i sector size 512 Bytes card size 12 MBytes sing on na merical at io scheduler nnc anc dvivers led ko drivers ade ko drivers i2c ko drvivers pun ko drivers sfr ko fay Svara ulo ko nnc Creg xler x 8608 reg Bxif Bx9598 link status full duplex 18B Mbps 7l nodu les 2 6 5 ucLPC kerne 1 drivers ush gadget g_f ile_storage ko i storage gadget File backed Storage Gadget version 26 January 2004 g file storage gadget Number of LINs 1 y file storage gadget lun ro File dev mncal Figure 15 Example Terminal Window Startup Message from uClinux Console 5 4 1 USB Driver Behavior Sometimes the USB COM port does not enumerate properly when the board in connected to the PC This is a known feature of the USB driver If you experience this problem just unplug the board shortly and then plug in again A new COM port that can be accessed properly should be created the second time This problem may occur after every time you start i e power cycle your PC If the ISP jumpers are inserted pressing the
30. it databus version used P3 20 Can be connected to RS232 interface if 16 bit databus version used P3 21 Can be connected to RS232 interface if 16 bit databus version used P3 19 Can be connected to RS232 interface if 16 bit databus version used Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 19 P3 22 Can be connected to RS232 interface if 16 bit databus version used P3 23 No special usage on QVGA Base Board if 16 bit databus version used P3 24 No special usage on QVGA Base Board if 16 bit databus version used P3 25 No special usage on QVGA Base Board if 16 bit databus version used P3 26 No special usage on QVGA Base Board if 16 bit databus version used P3 27 No special usage on QVGA Base Board if 16 bit databus version used P3 28 No special usage on QVGA Base Board if 16 bit databus version used P3 29 No special usage on QVGA Base Board if 16 bit databus version used P3 30 Can be connected to RS232 interface if 16 bit databus version used P3 31 No special usage on QVGA Base Board if 16 bit databus version used P4 0 P4 23 The address bus buffered signals from cpu board No special usage on QVGA Base Board P4 24 OE buffered signal from cpu board No special usage on QVGA Base Board P4 25 WE buffered signal from cpu board No special usage on QVGA Base Board P4 26
31. ler lets you get up and running quickly The small form factor OEM board offers many unique features that ease your learning curve and program development The board has also been designed for OEM applications with volume discount available e NXP s ARM7TDMI LPC2478 microcontroller in BGA package with 512 KByte program FLASH and 96 KByte SRAM e External FLASH memories 128 MB NAND FLASH and 4 MB NOR FLASH e External data memory 32 MB SDRAM 32 bit or 16 bit databus width e 12 0000 MHz crystal for maximum execution speed and standard serial bit rates including CAN and USB requirements e 32 768kHz RTC crystal e 100 10M Ethernet PHY interface based on National DP83848 e 256 Kbit 12C E2PROM for storing non volatile parameters e Buffered 16 or 32 bit data bus for external expansion e 200 pos expansion connector SODIMM 200 format 0 6mm pitch All LPC2478 pins available except a few used for Ethernet PHY interface e 3 3V only powering e Onboard reset generation e Compact SODIMM format 66 x 48 mm Six layer PCB design for best noise immunity There is an accompanying QVGA Base Board that can be used for initial prototyping work The features of the board are e 3 2 inch QVGA TFT color LCD with touch screen 4 wire version 18 bit RGB interface to display e Connectors 200 pos 0 6mm pitch SODIMM connector for LPC2478 OEM Board Expansion connector with all LCD controller signals for custom displays Expansion conne
32. locks may develop while Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 15 being used Invalid blocks are defined as blocks that contain one or more bad bits Do not erase or program factory marked bad blocks Refer to technical notes from Samsung for appropriate management of invalid blocks 3 5 4 Brand of Memory Chips Note that there is no guarantee for a certain brand or version of memory chips NOR flash NAND flash and SDRAM The lifetime of memory chips is limited and availability can also be limited from time to time Embedded Artists make every effort to mount the original design chip on the board In case that is impossible a compatible chip will instead be mounted without any prior notice There can be small programming differences between mounted brands The application program shall always read the chip id of flash devices to make certain which chip is actually mounted on the board The support page contains datasheets to the different memory devices and information about mounted devices on different board versions Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 16 4 QVGA Base Board Design This chapter contains information about the peripherals and general design of the QVGA Base Board and how to set the different jumpers on the board The schematic can be downloaded in pdf from the support page and is recommended to have printed out while reading
33. nd DBUS_EN unconnected 3 1 7 Reset Generation The rest generation is handled by a standard voltage supervisor chip CAT811S from Catalyst Semiconductor The reset signal will be held active i e low until the supply voltages 3 3V is within margins The reset duration is typically 200 mS consult the CAT811S datasheet for exact details The output reset signal is push pull output that is converted to an open collector open drain output via the 74LVC1G125 buffer An external reset source can pull the reset signal low with an open collector open drain output The reset generator can be found on page 2 of the schematic 3 1 8 I2C E2PROM There is also a 256 kbit E PROM accessible via the 12C interface The LPC2478 microcontroller has three on chip 12C communication channels Channel 0 is used for communicating with the EPROM More peripheral units are easily connected to the two wire 12C bus just as long as the addresses do not collide The address of the 256kbit E7PROM is OxA0 There are 1 5 kohm pull up resistors which are always needed on 12C busses included on the board The C E PROM can be found on page 2 of the schematic Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 12 3 1 9 Expansion Connectors The LPC2478 OEM Board integrated the core part of a typical LPC2478 board design with a reasonable large amount of external memories Almost all signals of LPC2478 are available on the
34. new The following transitions are available in the demo none left right top down blinds explode_v explode_h 5 2 Initial Setup and Powering The board can be powered from a PC via the included USB cable mini B to A cable A separate power supply is however needed in stand alone situations or when running USB Host application when powering heavy load external USB devices The power supply should be 9 15V DC 2 Amp A 2 1mm standard power plug is used to interface the board Any polarity is accepted See Figure 7 below for locating the USB connector and or the 2 4mm power connector It is possible to have both the USB cable and external powering connected to the board at the same time Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 27 Your PC Optional Powering aa Figure 7 Powering of QVGA Base Board The QVGA Base Board contains an USB to Serial bridge chip FT232R from FTDI that connects UART channel 0 on the LPC2478 to a virtual COM port on the PC via USB It is this serial channel that is the console interface to system in the uClinux system this is the console and in the sample applications this is the interface where printf ends up in Special USB drivers must be installed on the PC in order for the virtual COM port to be created See Section 5 4 for a description of how to install the FTDI USB driver There are four jumpers on the QVGA Base Board
35. nnector The ETM connector is not mounted on the board It s designated J6 The connector can be soldered to the board if needed The connector is from Tyco Electronics Amp and is a 38 way receptacle Mictor connector 0 025 pitch part number 767054 1 or 2 5767004 2 RoHS compliant Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 23 4 5 Important Components Figure 6 below illustrates the position on the QVGA Base Board for some important components in the design IrDA transceiver Accelerometer USB to serial activity LEDs SD MMC LEDs power inserted write protected Trimpot for analog input Trimpot for speaker output volume Esaa heb Speaker fa O te o e o Mo Reset push button and Reset LED SW2 SW5 marked KEY 1 4 LED6 13 marked LED1 8 on pcb P2 10 push button SW6 Voltage measurement pads and Power LED LED 15 Figure 6 QVGA Base Board Important Components Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 24 5 Getting Started This chapter contains information about how to get acquainted with the LPC2478 Developer s Kit Please read this section first before you start using the board it will be well spent time 5 1 Demo Applications The board is pre loaded with 12 demo applications These demonstrate t
36. other parts of the boards That way you will have the same potential as the board and therefore minimize the risk for ESD Never touch directly on the LPC2478 OEM Board and in general as little as possible on the QVGA Base Board The push buttons on the QVGA Base Board have grounded shields to minimize the effect of ESD Note that Embedded Artists does not replace boards that have been damaged by ESD 2 3 General Handling Care Handle the LPC2478 OEM Board and QVGA Base Board with care The boards are not mounted in a protective case box and are not designed for rough physical handling Connectors can ware out after Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 8 excessive use The QVGA Base Board is designed for prototyping use and not for integration into an end product Do not exercise excessive pressure on the LCD glass area That will damage the display Also do not apply pressure on the flex cables connecting the LCD touch screen These are relatively sensitive and can be damaged if too much pressure is applied to them Note that Embedded Artists does not replace boards where the LCD has been improperly handled 2 4 Code Read Protection The LPC2478 has a Code Read Protection function specifically CRP3 that if enabled will make the LPC2478 impossible to reprogram unless the user program has implemented such functionality Note that Embedded Artists does not replace LPC2478 OEM
37. per s Kit User s Guide Page 9 2 6 2 OEM Education QuickStart Boards and Kits Visit Embedded Artists home page www EmbeddedArtists com for information about other OEM Education QuickStart boards kits or contact your local distributor Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 10 3 LPC2478 OEM Board Design This chapter contains information about the LPC2478 OEM Board design both 32 bit and 16 bit databus width The schematic can be downloaded in pdf from the support page and is recommended to have printed out while reading this chapter 3 1 LPC2478 OEM Board Schematics 3 1 1 CPU The core part of the design is the NXP LPC2478 microcontroller It s an ARM7TDMI S CPU core with a lot of different peripheral units and on chip memory 512 KByte FLASH and 96 KByte SRAM There is also an external memory bus interface Page 2 of the schematic contains the CPU section of the design The microcontroller crystal frequency is 12 0000 MHz This frequency has been selected in order to allow high execution speed the PLL can generate a 72 MHz core clock from this as well as generating standard clock frequencies for the CAN and USB interfaces The on chip UART peripheral includes a fractional baud rate generator that allows standard baud rates to be generated with low frequency error There is a 32 768 kHz crystal clock for the on chip real time clock peripheral unit or RTC for short
38. related to the USB serial channel connected to UART 0 of the LPC2478 See Figure 8 below for details about where the jumpers are located Make sure the automatic ISP jumpers are open If not it s possible that a terminal program resets the board and or enable ISP mode by accident These jumpers should normally always be open USB to serial connector Automatic ISP jumpers Open disable ISP Shorted enable ISP control RX TX jumpers Both jumpers should always be inserted Figure 8 Jumper Settings for USB Serial Connection Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 28 The only exception is when downloading new code into the cpu via ISP i e via the USB to serial channel Follow the steps below to get contact with the console interface of the system 1 Connect the USB cable between the PC and the LPC2478 OEM board 2 Verify that the power LED on the LPC2478 OEM Board lights 3 Search for the new virtual COM port that is created This can be down from the Device Manager in Windows 4 Make sure the settings of the new COM port is 115200 bps or 38400 bps 8N1 8 databits no parity 1 stopbit 115200 bps if checking the output from the demo program and 38400 bps if working with the uCLinux port The COM port number should be a low number preferably below 6 since some terminal programs can only handle COM port number up to 5 5 Make sure the
39. ser s Guide Page 31 E see Device Manager File Action View Help e 423 Ba E IDE ATA ATAPI controllers S IEEE 1394 Bus host controllers gt Keyboards 5 Mice and other pointing devices Monitors 8 Network adapters 58 1394 Net Adapter E8 Broadcom 440x 10 100 Integrated Controller 8 Dell draadloze WLAN 1450 dubbele band WLAN Mipi E9 Wireless G Notebook Adapter with SRX Ge Other devices B PCMCIA adapters F Ports COM amp LPT SB Serial Port COM3 Processors SCSI and RAID controllers Sound video and game controllers Y System devices A Universal Serial Bus controllers BE Figure 11 Device Manager Dialog The new COM port USB Serial Port will be listed under the Ports list Right click on the new USB Serial Port and select Properties as illustrated in Figure 12 below g Device Manager E E X File Action view Help gt meS ATRA 6 IDE ATA ATAPI controllers 37 IEEE 1394 Bus host controllers 5 gt Keyboards Mice and other pointing devices USB Serial Port B Monitors E Network adapters B 1394 Net Adapter E9 Broadcom 440x 10 100 Integrated Controller E9 Dell draadloze WLAN 1450 dubbele band WLAN Mini PC E9 Wireless G Notebook Adapter with SRX h Other devices E PCMCIA adapters Ports COM amp LPT R AUSB Serial Port CON i Update Driver w Processors Disable SCSI and RAID controll Uninstal H ja H Properties
40. sitions Figure 4 illustrates the default jumper positions as mounted when the board is delivered from Embedded Artists WSQgg POR Can d a j5 a EEEE a i Ck Figure 4 QVGA Base Board Default Jumper Positions 4 3 2 Illegal Jumper Combinations Note that some jumpers are mutual exclusive and should not be inserted simultaneously e USB OTG and LCD interface the four jumpers in J25 should not be inserted when using the LCD interface since signals P1 27 P1 29 are also connected to the ISP1301 e When using the 32 bit data bus version of the LPC2478 OEM Board all jumpers in connectors J20 should always be removed Also J23 J24 should not be in upper position The UART signals in signals P3 xx else collide with the upper 16 data bits of the data bus J23 J24 can be in lower position to connect UART 2 RxD TxD to the RS232 interface Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide J26 ETM J8 not mounted Expansion connector J1 J2 SODIMM connector XI USB OTG Device Page 22 4 4 Connectors Figure 5 illustrate the position of all external connectors on the QVGA Base Board USB Host Input power USB to serial r fhnonnann i 229 Expansion connector J3 Display Expansion J36 Figure 5 QVGA Base Board External Connectors 4 4 1 Mictor 38 ETM Co
41. this chapter The QVGA Base Board contains a number interfaces and connectors to the LPC2478 OEM Board The design can be viewed as a reference schematic for custom designs around the LPC2478 OEM Board 4 1 Usage of CPU Pins Almost all pins of the LPC2478 are directly available on the expansion connectors Only in a few cases are pins used for dedicated functionality like Ethernet interface and chip select signals Such pins are not available on the expansion connector The table below lists all pins and their possible restrictions Pin Usage P0 0 Can be connected to RD1 for CAN channel 1 can also connect to IrDA transceiver P0 1 Can be connected to TD1 for CAN channel 1 can also connect to IrDA transceiver P0 2 Can be connected to USB to serial bridge TxD on UART 0 P0 3 Can be connected to USB to serial bridge RxD on UART 0 P0 4 LCD databit 0 can also be connected to RD2 for CAN channel 2 P0 5 LCD databit 1 can also be connected to TD2 for CAN channel 2 P0 6 LCD databit 8 P0 7 LCD databit 9 P0 8 LCD databit 16 P0 9 LCD databit 17 P0 10 Can be connected to RS232 interface TxD on UART 2 P0 11 Can be connected to RS232 interface RxD on UART 2 P0 12 Can be connected to enable USB host power switch P0 13 Can be connected to LED active low for USB host indicator P0 14 Can be connected to USB device enable device signal P0 15 QVGA displa
42. y and Touch screen serial interface SPI SCK P0 16 QVGA display serial interface SSEL P0 17 QVGA display and Touch screen serial interface SPI MISO P0 18 QVGA display and Touch screen serial interface SPI MOSI P0 19 QVGA display serial interface command data select P0 20 Touch screen serial interface SSEL P0 21 No special usage on QVGA Base Board P0 22 No special usage on QVGA Base Board P0 23 Can be connected to accelerometer X axis Copyright 2011 Embedded Artists AB LPC2478 Developer s Kit User s Guide Page 17 P0 24 Can be connected to accelerometer Y axis P0 25 Can be connected to accelerometer Z axis or analog input trimpot P0 26 Connects to speaker output on AOUT signal P0 27 I2C SDAO connects to PCA9532 IO expander P0 28 12C SCL0 connects to PCA9532 IO expander P0 29 P0 30 Connects to USB device OTG interface P0 31 Connects to USB host interface USBB P1 2 Connects to MCICLK on SD MMC connector P1 3 Connects to MCICMD on SD MMC connector P1 5 Connects to MCIPWR on SD MMC connector P1 6 Connects to MCIDATO on SD MMC connector P1 7 Connects to MCIDAT1 on SD MMC connector P1 11 Connects to MCIDAT2 on SD MMC connector P1 12 Connects to MCIDAT3 on SD MMC connector P1 13 No special usage on QVGA Base Board P1 18 Connects to QVGA backlight control Can also be connected to LED
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