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ETM support can be used for debugging as an alternative to the on-board integrated debugger.

Philips ISYSTEM LPC2138 Manuals

Connection is made using opc2138 standard USB cable. Battery power supply for RTC can be optionally connected to P11 see P11 description for more details.

Default set in position J7 is set to enable pins P1.

J8 is set to enable pins P1. J10 connects Vbat pin of LPC to the main 3. PCB terminal providing connection for battery. When battery power supply applied to P11 is used, J10 uer be open.

P13 is analog output from OP amplifier, which connects to output of the DA converter. Pushing the button generates a low signal.


J22 is set to turn on LCD backlight. Startup mode populated on the bottom side of the target board: Jumper J9 must be set to position when using an external debugger. Expansion connectors All CPU signals are available on the expansion connectors, which are standard connectors with a 2.

On-board integrated debugger is not part of the schematic. All jumpers are set in the default position during the final tests in the manufacturing. In case of any problems, the driver is located under winIDEA install directory e. The two power LEDs should turn on.


This should initialize the development system and the user should be able to write to the usef CPU RAM through the memory window. This should program and run the application until main function. The development system is now lpx2138 for the debugging. The development system should be now ready for use.

The loader can execute the ISP command handler or the user application code. If there is no request for the ISP command handler execution a high-level detecteda search is made for a valid user program.

If a valid user program is found then the execution control is transferred to it.


Components list, Power supply – Philips Target Board LPC2138 User Manual

Boot-loader mode should be manua selected only for troubleshooting or when the user explicitly wants to use Boot-loader mode. J16 must be removed when Bootloader mode is selected see J16 description for more details. There was a case, where the code was programmed manua the flash, which disabled the JTAG debug port shortly after reset.

Due to the NXP implementation, the debugger cannot take over control over the CPU immediately after reset, plc2138 a part of code is executed before the CPU can be stopped by the debugger. In this case, Boot-loader mode has to be selected in order for the CPU to start executing ISP command handlerin which the debugger can always stop the program and take over control over the CPU.

Then a new valid program can be programmed in the flash or flash erased. Then the User mode can be used again. It’s a community-based project which helps to repair anything.