User manual

LPC4357 Developer’s Kit - User’s Guide

Page 17

signal BCS2. This means that the register is accessible in memory region: 0x1E00 0000 - 0x1EFF

FFFF. No jumper in JP2 is needed when working with the LPC4357 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 6 – External Memory Bus Circuit

4.6 SP5: Debug Interfaces

Note that the LPC4357 MCU is sensitive to ESD on the JTAG port. Observe extra care around this.

Make sure the ground of the JTAG interface is connected to the OEM Base Board ground

before even connecting the JTAG interface. Never have the OEM Board unpowered while the

JTAG pod is powered.

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. It is not used when working with the LPC4357 OEM board.

The connector can be soldered to the board if needed. The connector can be bought from

16-bit register

Parallel NOR FLASH

JP2 and JP1

left: JP2

right: JP1

LEDs

left to right: LED16 - LED 1

control

SJ12

control

SJ1