PowerQUICC ProcessorsのトピックRe: MPC8640D JTAG problem

MPC8640D JTAG problem

jeffcao — Thu, 20 Apr 2017 09:32:09 GMT

I am facing issue while connecting JTAG with MPC8640 board.I am using WINDRIVER debug 8640D.

in the process "attemping JTAG communication " it display fail.

what might be the problem?

I found it can distinguish two core。

but it cannt be conmmunicate with the 2 core

Re: MPC8640D JTAG problem

alexander_yakov — Fri, 21 Apr 2017 05:42:06 GMT

Debug interface is a part of core, so if the core is disabled, debug interface is also inaccessible.

This is the most frequent reason for the core to not respond to debugger commands.

Have a great day,
Alexander
TIC

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Re: MPC8640D JTAG problem

jeffcao — Fri, 21 Apr 2017 06:26:15 GMT

you say ”This is the most frequent reason for the core to not respond to debugger command”

How can I prove this viewpoint.

power on sequence I have been check

No abnormality found

Re: MPC8640D JTAG problem

alexander_yakov — Fri, 21 Apr 2017 07:20:15 GMT

In addition to power supply, there are a lot of other things to check:

1. Reset configuration

2. Clock frequency and clock settings

3. etc