MCB2140: HOW TO RE-ENABLE JTAG ON LPC21XX DEVICES
Information in this article applies to:
I mistakenly disabled JTAG communications on my MCB2140 board and want to re-enable it. I've tried re-programming or erasing flash using the Philips LPC2000 Flash Utility, but every time I try to connect I get the message:
Cannot communicate with test board!
My serial connections are correct. How can connect to the device to re-enable JTAG?
The following low-level flash erase procedure re-enables JTAG for the MCB2140 evaluation board. This procedure also disables the watchdog timer.
The flash is now erased. You may now debug and download via JTAG as before.
The following Discussion Forum threads may provide information related to this topic.
Last Reviewed: Thursday, November 30, 2006
of your data.