Embedded Artists LPC3131 Manuale utente

LPC3131/41 Developer’s Kit - User’s Guide

EA2-USG-0901 Rev K

LPC3131/41 Developer’s Kit

User’s Guide

Get Up-and-Running Quickly and

Start Developing Your Applications On Day 1!

LPC3131/41 Developer’s Kit - User’s Guide

Page 2

Embedded Artists AB

Davidshallsgatan 16

SE-211 45 Malmö

Sweden

info@EmbeddedArtists.com

http://www.EmbeddedArtists.com

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 their respective owners and should be treated as such.

LPC3131/41 Developer’s Kit - User’s Guide

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Table of Contents

1Document Revision History 5

2Introduction 6

2.1 Features 6

2.2 ESD and Handling Precaution 7

2.3 LPC3131/41 Core Voltage Precaution 7

2.4 CE Assessment 8

2.5 Other Products from Embedded Artists 8

2.5.1 Design and Production Services 8

2.5.2 OEM / Education / QuickStart Boards and Kits 8

3LPC3131/41 OEM Board Design 9

3.1.1 Page 2: Powering 9

3.1.2 Page 3: LPC3131/41 CPU 10

3.1.3 Page 4: External Memories 11

3.1.4 Page 5: Expansion Connector 12

3.2 Usage of CPU Pins 12

3.3 LPC3131/41 OEM Board Mechanical Dimensions and Connector 15

3.4 Things to note about the LPC3131/41 OEM Board 15

3.4.1 NAND FLASH Bad Block 15

3.4.2 Brand of Memory Chips 15

4LPC31xx Base Board Design 16

4.1 Usage of CPU Pins 16

4.2 Known Limitation / Things to note about the LPC31xx Base Board 18

4.2.1 Codec Usage and Boot Mode 18

4.2.2 NAND Booting 18

4.2.3 SD/MMC card detect 19

4.2.4 USB Host applications –power supply 19

4.2.5 USB Host applications –over current sense 19

4.3 Jumpers 20

4.3.1 Default Jumper Positions 21

4.3.2 Illegal Jumper Combinations 21

4.4 Connectors 22

4.5 Important Components 23

4.6 NAND Boot Problem Fix 24

5Getting Started 26

5.1 Initial Setup and Powering 26

5.2 FTDI USB Driver 26

5.2.1 USB Driver Behavior 29

5.3 Booting 29

5.3.1 Jumper Settings 30

5.3.2 Creating a Boot Image 31

LPC3131/41 Developer’s Kit - User’s Guide

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5.3.3 Booting via UART 35

5.3.4 Booting via SPI NOR flash 35

5.3.5 Booting via USB DFU class 36

5.3.6 LED on GPIO2 37

5.3.7 Booting via NAND Flash 38

6Further Information 39

LPC3131/41 Developer’s Kit - User’s Guide

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1 Document Revision History

Revision

Date

Description

2009-03-09

First complete version.

Add description about booting and correct language and spelling

errors.

2009-04-11

Update description of MMC/SD card detect fix and codec handling.

2009-05-05

Update description for LPC31xx Base Board v2.0 (with Ethernet).

2009-06-18

Update with description for EWARM.

2009-09-09

Added information about LPC3141.

Added information about NAND boot and LCD/Ethernet problem

(section 5.3.6).

2009-11-27

Changed title of manual to ‘Developer’s Kit” manual.

Updated OEM Board schematic to v1.2.

Replaced earlier section 5.3.6 with new section about NAND boot

and LCD/Ethernet problem (section 4.6 ).

2010-07-05

Added information in section 4.2 about things to note about the

LPC31xx Base Board (UDA1380 I2C address, SD card detect logic,

USB Host powering).

2010-11-15

Updated information about NAND boot problem.

2011-08-24

Added information about VBUS over-current sense for USB Host

applications (section 4.2.5 ).

2011-12-19

Added note about CE marking.

Removed schematics from document.

2012-05-10

Updated section 5.3.4 about SPI NOR boot. Added section 5.3.7

about booting from NAND flash.

LPC3131/41 Developer’s Kit - User’s Guide

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2 Introduction

Thank you for buying Embedded Artists’ LPC3131/41 Developer’s Kit based on NXP’s ARM926EJ-S

LPC3131/41 microcontroller.

This document is a User’s Guide that describes the LPC3131/41 OEM Board and the LPC31xx Base

Board hardware design. It is the User’s Manual for both the LPC3131/41Developer’s Kit as well as for

just the LPC3131/41 OEM Board.

2.1 Features

Embedded Artists’LPC3131/41 Developer’s Kit with NXP’s ARM926EJ-S LPC3131/41 microcontroller

lets you get up-and-running quickly. The small sized OEM board offers many unique features that ease

your learning curve and speed up your program development. The board has also been designed for

OEM applications with volume discount available. The features of the LPC3131/41 OEM board are:

NXP's ARM926EJ-S LPC3131/41 microcontroller in BGA package, with 192 KByte internal

RAM

External data memory: 64 MB SDRAM (16-bit databus width)

External FLASH memories: 256 MB (2Gbit) NAND FLASH and 4 MB (32Mbit) SPI-NOR

FLASH

12.0000 MHz crystal for maximum execution speed and standard serial bit rates, including

CAN and USB requirements

256 Kbit I2C E2PROM for storing non-volatile parameters

Buffered 16-bit data bus for external expansion

200 pos expansion connector (SODIMM-200 format, 0.6mm pitch)

All LPC3131/41 pins available (except dedicated pins for on-board memories)

+5V only powering

Onboard reset generation

Compact SODIMM size: 66 x 48 mm

Six layer PCB design for best noise immunity

There is an accompanying LPC31xx Base Board that can be used for initial prototyping work. The

features of the board are:

Connectors

200 pos, 0.6mm pitch SODIMM connector for LPC3131/41 OEM Board

RJ45 Ethernet connector (available on base board from v2.0)

Expansion connector to 3.2 inch QVGA TFT color LCD with touch panel

Three expansion connectors with all SODIMM signals

MMC/SD interface and connector

USB OTG or Host connectors

Four 3.5mm audio connectors (mic in, line in, line out, headphone out)

JTAG connector

2.1mm power input

LPC3131/41 Developer’s Kit - User’s Guide

Page 7

Power

Power supply, either via USB or external 9-15V DC

(LPC3131/41 OEM Board is powered with +5V)

Current monitors on input voltages

Other

100/10Mbps Ethernet interface base on DM9000A chip (available on base board from

v2.0)

UDA1380 I2S codec with mic in, line in, line out, and headphone out

5-key joystick (via I2C)

3-axis accelerometer

8 LEDs (via I2C)

Trimpot analog input

USB-to-serial bridge on UART (FT232R)

RS232 alternative interface on UART

XBee™ RF-module alternative interface on UART

(note that XBee module is not included in bundle)

Reset push-button and LED

205x135 mm in size

2.2 ESD and Handling Precaution

Please note that the LPC3131/41 OEM Board and LPC31xx Base Board come without any case/box

and all components are exposed for finger touches –and therefore extra attention must be paid to

ESD (Electro-Static Discharge) precaution.

Make it a habit to always first touch the metal surface of one of the USB or SC/MMC connectors

for a few seconds with both hands before touching any other parts of the boards. That way, you

will have the same electrical potential as the board and therefore minimize the risk for ESD.

Never touch directly on the LPC3131/41 OEM Board and in general as little as possible on the

LPC31xx Base Board. The keys on the LPC31xx 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.

In case you have also connected the QVGA Display Module to the LPC31xx Base Board, do not

exercise excessive pressure on the LCD glass area. That will damage the display. Also, do not apply

pressure on the two flex cables connecting the LCD. These are relatively sensitive and can be

damaged if too much pressure is applied to them.

Note that Embedded Artists do not replace QVGA Display Modules where the LCD has been

improperly handled.

2.3 LPC3131/41 Core Voltage Precaution

The core voltage for the LPC3131/41 can be dynamically changed, via I2C commands sent to the

LTC3447 voltage converter. The voltage can be set to up to 2V. Note that this is above the limits of the

core voltage. See LPC3131/41 datasheet for details (the maximum core voltage is 1.30V).

LPC3131/41 Developer’s Kit - User’s Guide

Page 8

Note that Embedded Artists do not replace LPC3131/41 OEM boards where the core voltage

(VDD(CORE)) has been raised above 1.30 Volt. It is the user’s responsibility not to exceed the

voltage specification found in the datasheet.

On version 1.1 boards, two zero ohm resistors/jumpers must be soldered to the LPC3131/41 OEM

Board in order to connect the I2C communication channel of the LTC3447 to I2C channel#1. See the

schematic for details.

2.4 CE Assessment

The LPC3131/41 Developers Kit (consisting of the LPC3131/41 OEM Board and LPC31xx Base

Board) is CE marked. See separate CE Declaration of Conformity document.

The LPC3131/41 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 LPC3131/41 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 LPC3131/41 Developers Kit.

Due to the nature of the LPC3131/41 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 LPC3131/41 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.

2.5 Other Products from Embedded Artists

Embedded Artists have a broad range of LPC1xxx/LPC2xxx/LPC3xxx/LPC4xxx 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.

2.5.1 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 LPC2xxx

microcontroller family 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.

2.5.2 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.

LPC3131/41 Developer’s Kit - User’s Guide

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3 LPC3131/41 OEM Board Design

This chapter contains detailed information about the electrical and mechanical design of the

LPC3131/41 OEM Board. Note that it is version 1.2 of the board that is presented. Differences from

version 1.1 and 1.0 are small and can be seen in the schematic (first page). The schematic can be

downloaded in pdf format from the support page, and is recommended to have printed out while

reading this chapter.

The following subsections describe in more detail each part of the design.

3.1.1 Page 2: Powering

Page 2 of the schematic contains the power supplies of the LPC3131/41 OEM Board.

3.1.1.1 1.8V and 3.3V Voltages

The LPC3131/41 requires three voltages; 1.2V for the core, 1.8V for the memory interface and 3.3V for

the rest of the i/o interfaces. The 1.8V and 3.3V voltages are fixed and generated by two LM3671MF

step-down switching regulators from National Semiconductor. These regulators are capable of

generating 600mA, which by far exceed the needed current by the LPC3131/41 and other components

on the LPC3131/41 OEM Board.

3.1.1.2 1.2V Adjustable Core Voltage

The core 1.2V voltage is adjustable and is generated by the step down switching regulator LTC3447

from Linear Technologies. This regulator is capable of generating 600mA, which also by far exceed the

needed current by the LPC3131/41. The adjustment is done via an I2C channel, I2C1 in the

LPC3131/41 case. The core voltage can be adjusted as a power save feature. By lowering the voltage,

the total power consumption can be lowered but the clock frequency of the core must then also be

lowered. This is a trade-off that is important for hand held equipment. Note that it is the user’s

responsibility not to program the LTC3447 to generate too high core voltage, which is possible.

The LTC3447 can generate voltages up to 2V, which by far exceed the limits for the LPC3131/41. To

minimize the risk of accidentally setting the voltage the I2C channel is disconnected via R56/R57

(which are 0 ohm resistors/jumpers that are not mounted). R56/R57 is the only thing that differs

between v1.0 and v1.1 of the board. On v1.0, the I2C1 of the LPC3131/41 is always connected to the

LTC3447.

See the LPC3131/41 datasheet for exact details about ranges, but it is in the region of 1.1-1.3V. Also

see the LTC3447 datasheet for details about how to adjust the voltage (it is a write-only register). The

I2C address for the LTC3447 is indicated in the schematic.

3.1.1.3 Input Voltage

The input voltage to the LPC3131/41 OEM Board is given by the requirements of the LM3671 and

LTC3447. A recommended input voltage range is 3.4 –5.5V. The input supply must be stable but there

are no special needs for bulk capacitors close to the power pins on the expansion connectors. The

needed capacitors are placed close to the step down switching regulators on the LPC3131/41 OEM

Board.

3.1.1.4 OTP VPP Voltage

The VPP power to the LPC3131 is fixed to 1.2V. The LPC3141 has on-chip OTP (One-Time

Programmable) fuses that can be programmed. 3.3V must be applied to VPP during programming.

The OTP voltage switch (U4) is mounted on LPC3141 OEM Boards, but not on LPC3131 OEM

Boards.

LPC3131/41 Developer’s Kit - User’s Guide

Page 10

3.1.2 Page 3: LPC3131/41 CPU

Page 3 of the schematic contains the core part of the design, which of course is the LPC3131/41

microcontroller. It is an ARM926EJ-S cpu core with a lot of different peripheral units and on-chip

memory (192 KByte SRAM).

3.1.2.1 12MHx Crystal and PLLs

The microcontroller crystal frequency is 12.0000 MHz. This frequency is the recommended from NXP.

There is dual on-chip PLLs on the LPC3131/41 in order to generate different needed frequencies for

the chip. Note that the clocking structure is very different from the LPC2xxx family. It is a more

complex structure but also much more versatile and flexible. There is no shortcut but to read

the LPC3131/41 User’s Manual in detail and understand the options and settings.

The main thing differing between the LPC3131 and the LPC3141 is the maximum core frequency for

the processor. See datasheet for details.

3.1.2.2 Booting

The LPC3131/41 starts executing from an on-chip ROM, containing the bootloader. Note that the

LPC3131/41 does not contain any on-chip FLASH memory. Program code must be loaded from an

external source into the on-chip SRAM.

There are multiple boot options, as indicated in the schematic. The default is set to UART mode

booting. Normally the default boot option can be controlled/changed from the LPC31xx Base Board,

but the default resistors can also be changed for special orders of the board. The LPC3131/41 OEM

Board contains both SPI NOR flash and NAND flash in order to support stand alone booting.

Section 4.6 contains important information if NAND boot is used.

3.1.2.3 JTAG interface

The JTAG interface is a standard ARM-compatible JTAG interface. There is a special feature on the

LPC3131/41 that can bypass the ARM core scan chain (i.e. the debug access), by pulling JTAGSEL

low. In that case, the JTAG interface is used for boundary scan access. The multiplexer (U17) selects

the different scan chain outputs depending on the JTAGSEL signal. Normally this has no affect on the

operation since the input signal JTAG_DBGEN (connected to JTAGSEL) is held high.

3.1.2.4 SPI NOR FLASH

There is a 32Mbit (4 MByte) NOR flash connected to the SPI bus. There is an option to mount one of

two different manufacturers; either S25FL032 from Spansion or AT45DB321 from Atmel. Embedded

Artists can choose to mount any one of these chips (or similar) on the board and it depends on

component availability at the time of production. Both are compatible for the relevant commands. In

case special commands are used, it is possible to read out chip id and determine type.

3.1.2.5 Reset Generation

The reset generation is handled by a standard voltage supervisor chip, CAT811R from Catalyst

Semiconductor. The reset signal will be held active (i.e., low) until the supply voltages, +3.3V, is within

margins (above 2.63V). The reset duration is typically 200 mS (consult the CAT811R 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).

3.1.2.6 I2C E2PROM

There is a 256 kbit E2PROM accessible via the I2C interface. The LPC3131/41 has two on-chip I2C

communication channels. Channel #0 is used for communicating with the E2PROM. More peripheral

units are easily connected to the two-wire I2C bus, just as long as the addresses do not collide. The

address of the 256kbit E2PROM is 0xA0, which is also indicated in the schematic.

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