Embedded Artists LPC4088 Developer's Kit EA-OEM-510 EA-OEM-510 Hoja De Datos

LPC4088 Developer’s Kit - User’s Guide 

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Copyright 2013 © Embedded Artists AB 

 

wrong. More symptoms than this is needed to judge if a board is wrong, or not. Do not forget 

to press the reset push-button all the time during this measurement. Redo the test in case of 

uncertainty. 

8.  Now, measure the current consumption of the OEM Board when it is running an application. It 

is a problem to not have a specified application running because the current consumption can 

vary widely between different applications. The current consumption shall increase compared 

to the previous test (in case an application is running). It is recommended to download one of 

the precompiled sample applications from the LPC4088 Developer’s Kit support page on the 

Embedded Artists web site. How to download is explained in next section. The sample 
application s_sdram.hex has for example a known current consumption range. The valid 

range is 650-900m V (which corresponds to 130-180mA). The current consumption varies 

between different sample applications depending on which peripherals that are active. A 

running application will in general give a range of 400-700mV (which corresponds to 80-

140mA) 

9.  In most cases it is possible to power the board via the USB interface, J25 (the UART-to-USB 

bridge mini-B USB connector). Redo tests 3) to 8) above again with USB powering. Connect 

J25 directly to a PC with the USB cable included in the Developer’s Kit. 

Note that not all PC:s and/or laptops can power the board. In such cases, a USB hub with 

independent powering can work. In this case, connect J25 to a USB Hub, which in turn is 

connected to a PC. 

The second step is to make sure that the LPC4088 MCU on the OEM Board is working. 
Test that it is possible to download one of the precompiled test programs that exist on Embedded 

Artists support site. Use Flash Magic to download code over the UART-to-USB bridge. See section 

5.4.1 for details how to download. Make sure both jumpers in JP20 are inserted and that correct 

settings in Flash Magic are used. 
Optionally test that it is possible to download via the JTAG/SWD interface. A JTAG/SWD debug 
interface us then needed. The low-cost LPCXpresso target board series from NXP contains a 

JTAG/SWD debug interface called LPC-LINK that can be used for this. Other brands will also work. 

The third step is to utilize the just downloaded precompiled sample applications, one after one, to verify 

correct operation of individual parts of the OEM Board as well as the OEM Base Board. While doing 

these tests, be sure to not have anything connected to the system. 
There are sample applications for testing/verifying operation of: 

1.  Analog input 
2.  I2S-E2PROM 
3.  NAND flash 
4.  Accelerometer 
5.  I2S audio via codec 
6.  Ethernet 
7.  SD/MMC memory card interface 
8.  Joystick 
9.  LEDs and push-buttons (via the PCA9532) 
10.  Audio via analog output