User manual

LPC4357 Developer’s Kit - User’s Guide

Page 12

3.4 Trace Connector

There is a connector on the top side of the LPC4357 OEM board, carrying all signals needed for

debugging with trace. It is a standard 20 pos (50 mil pitch) trace connector as defined by ARM. Figure

1 illustrates where J1 is located on the board.

There is a trace connector on the OEM Base Board also, but this shall not be used for trace on the

LPC4357. It was not possible to get compatible pinning with other OEM boards. Instead J1 was added

to the design to support trace. Debugging without trace can be done either via J1 (on the LPC4357

OEM board) or the 10 pos debug connector (J7) on the OEM Base Board.

3.5 I2S and SGPIO Connectors

There are two 20-pos, 50 mil pitch connectors on the top side of the LPC4357 OEM board. See Figure

1 for location. These connectors carry selected I2S, I2C, SGPIO and SCT signals and can be used to

connect these signals to a separate expansion boards. For example an audio and video expansion

board. Note that some of the signals can be used on the OEM base board. Before using the signals,

always check for possible contentions.

3.6 uSD Memory Card Interface

There is a uSD/transflash memory card interface connector, J2, on the bottom side of the board. See

Figure 2 . LED2, on the top side, lights when the interface is powered. See Figure 1to locate LED2.

The signals on the SODIMM edge connector that are normally allocated for memory card interface (on

other OEM boards) carry other signals on the LPC4357 OEM board that have no relation to the

memory card interface.

Figure 2 – LPC4357 OEM Board Picture, bottom side

uSD/transflash connector