How do I reduce the JTAG clock frequency?
If you are experiencing unreliable program download or debugging over JTAG it is a good idea to try reducing the JTAG clock frequency.
If you are using an ARM CrossConnect, a Wiggler or an FT2232 JTAG device you can reduce the clock frequency by increasing the JTAG Clock Divider target property (the default setting is 1).
If you are using an ARM CrossConnect you can also enable adaptive clocking by setting the Adaptive Clocking target property to Yes. This mode uses the RTCK signal to dynamically control the JTAG clock frequency.
If you are using a J-Link you can alter the clock frequency by setting the Speed target property (the default setting is 4000).
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