In trying to use the serial Flash ISP for the first time, I got a connection and downloaded new code. The code had some bugs, and now I can't connect any longer. When you attempt to put the MCB2140 in manual ISP mode by using SW1 and SW2, is there an indication? How do I tell? I will be using the JTAG later. Just trying to get the serial version working reliably.
You need just to set the jumpers as described in: http://www.keil.com/support/man/docs/mcb2140/mcb2140_fp_using_lpc2000.htm
They are set per the document. But, still will not connect to serial port as it did before.