User manual

LPC3250 Developer’s Kit v2 - User’s Guide

Page 60

Figure 35 – Identifying R163

Note that R163 has been removed on all boards shipped out from Embedded Artists after May

15, 2012. Since there is a transition period, and stock at distributors, there is no guarantee that the

resistor has been removed on boards delivered after this date. Please always check if the board has

R163 removed. If not, remove R163.

5.6.7 Initialization of External Memory Bus

The databus buffer (U15) to the external memory bus is controlled by the OE and BLS0/BLS1 signals.

Even though the external memory bus is not used, it is recommended to initialize the EMC peripheral

and associated pins fully (for both SDRAM and static memory regions). This will give OE/BLS0/BLS1

defined states.

5.6.8 USB OTG Transceiver

The USB OTG transceiver (U31, MIC2555) exists in two versions, -0YML and -1YML. Either one can

be mounted on the OEM Base Board. The difference is the I2C address that the chip answers to. Any

software using the MIC2555 must check which I2C address the chip responds to.

The OTG transceiver is connected to the USB channel that is not used by the LPC3250, so this is no

problem for LPC3250 OEM board users.

5.6.9 OEM Base Board revision

The LPC3250 is fully supported by the OEM Base board revision B. Earlier revisions are rev A and

PB1. The main difference between these earlier board revisions is jumper JP34 (LCD pixel data

mapping). This jumper was added on revision B.

Remove R163