This is a strange one. I'm trying to get a new design running with
LPC2468, and I can get them to talk to me. I've got 2 proto boards
both do the same thing.

When I connect the JtagJET debugger, it just keeps saying RTCK not
present. I've tried pullups and pulldns on both RTCK and TCK either
way, but still no change. The rest have pullups.

But even when I short the PRGM pins and try to load with RD0/TD0, it
doesn't do that either, either with FlashMagic or LPC2000 flash.

It has a 12MHz xtal, but I don't think that should even matter as
these guys startup off their internal 4MHz RC OSC don't they?

I've done several other designs with LPC2104 and LPC2132 and never
had this much of a problem getting them to talk. No, the /RESET is
up. There's power on the part. I keep looking at the schematic but
don't find anything else that could account for this.

What could make both the JTAG and RX/TX loader not function?

Chris.

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I found the problem. Typo. Pins 26 and 36 were reversed on my
schematic symbol for the MCU. That meant that part of the internal VCC
for the part was not getting power. Mod'd the boards and now they
work. Silly error.

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