LPC3131/41 Developer’s Kit - User’s Guide
Page 15
Copyright 2011 © Embedded Artists AB
The
LPC31xx Base Board
illustrates how to typically connect external interfaces (like USB, external
memory devices, etc) to the
LPC3131/41 OEM Board
. Study this schematic for details.
3.3
LPC3131/41 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).
Figure 1 – LPC3131/41 OEM Board Mechanical Dimensions
The SODIMM-200 format is a standard and there exist many connectors that are suitable from many
different manufactures. The many sources also keep the connector cost very low. Note that the
connector should be 1.8V keyed.
See document
OEM Board Integration Guide
for more information about suitable connectors, but
basically any SODIMM, DDR2, 200pos, 1.8V, right-angled connector will do.
3.4
Things to note about the LPC3131/41 OEM Board
3.4.1
NAND FLASH Bad Block
The NAND Flash is the MT29F2G08ABDHC from Micron and contains 2 GBit capacity. The chip may
include invalid blocks when shipped from factory. A maximum of 40 invalid blocks may exist initially,
i.e., 2008-2048 valid blocks. Additional invalid blocks may develop while being used. Invalid blocks are
defined as blocks that contain one or more bad bits. Do not erase or program factory-marked bad
blocks. More information about appropriate management of invalid blocks can be found in technical
notes and datasheet from Micron.
3.4.2
Brand of Memory Chips
Note that there is no guarantee for a certain brand or version of memory chips; SPI-NOR flash, parallel
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.
66 mm
48 mm
1.8V keying of SODIMM board
