How to Reserve JTAG pins

[ivekengineer]

I'm using a MC56F8257.  In Processor Expert, what component can I configure so that the JTAG pins will show up as "used" in the Processor window? I understand that they are JTAG pins by default, and hence don't really need to be configured - but there must be something I can select so that the pins are shown as used on the processor pinout.

[Lukas_Heczko]

Hi, I’m afraid that for MC56F8257 it is not possible to show JTAG pins on package view or reserve them for JTAG purpose as there is no JTAG/EOnCE component available.

As a workaround, it is possible to add Init_GPIO component to the project and configure it to use JTAG pins, however you have to switch to “no” the Call Init metod property in Initialization group (placed at the bottom of Init_GPIO component). This is necessary, otherwise, after the Processor Expert initialization, the pins will be re-routed as GPIO instead of default JTAG functionality. This way, the pins will be shown as used (although as by Init_GPIO) in the Processor package view.