User manual

LPC3250 Developer’s Kit v2 - User’s Guide

Page 18

signal BCS3. This means that the 16-bit register is accessible in memory region: 0xE300 0000 -

0xE3FF FFFF. No jumper in JP2 is needed when working with the LPC3250 OEM Board.

SJ12 shall be in default position (pad 1-2 shorted) to let BCS2 control chip select of the 16-bit register.

SJ1 controls the output enable of the register. By default it is grounded (pad 1-2 is shorted) and hence

the register drives the LEDs and expansion connector, J6.

Figure 4 – External Memory Bus Circuit

4.6 SP5: Debug Interfaces

The multiple debug interfaces can look complex, but that is just because the board supports many

different OEM Boards. The connectors are:

 J7 – this is the new and smaller footprint standard ARM debug connector. It has 2x5 pins in

50 mil pitch. The connector supports both the SWD and JTAG interfaces. Note that not all,

and in particular older, JTAG debug probes do not support the SWD interface standard.

Note where pin 1 is found (see picture below) for this connector.

 J8 – this is the old and big footprint standard ARM debug connector. It has 2x10 pins in 100

mil pitch. The connector supports both the SWD and JTAG interfaces. Note that not all, and in

particular older, JTAG debug probes do not support the SWD interface.

 J9 – this is the old and big footprint 38 pin Mictor connector for ETM trace for the LPC2478.

This connector is not mounted. The connector can be soldered to the board if needed. The

connector can be bought from Tyco Electronics Amp and is a 38-way receptacle Mictor

connector, 0.025” pitch, part number: 767054-1 or 2-5767004-2 (RoHS compliant). This

connector is not used when working with LPC3250 OEM boards.

 J10 – this is the new and smaller footprint standard ARM Cortex-Mx connector for trace. It

carries the trace signals as well as the debug signals found on J7. This connector is not used

when working with LPC3250 OEM boards.

16-bit register

Parallel NOR FLASH

JP2 and JP1

left: JP2

right: JP1

LEDs

left to right: LED16 - LED 1

control

SJ12

control

SJ1