I'm using an ST ARM Cortex part for the first time. I've been using Luminary parts until now.
I notice that on the Olimex demo board for the STM32F103RBT6, they have the JTAG TRST pin connected, but on the Luminary eval board for the LM3S811 the TRST pin is left open.
Does anyone know why this is? Is it just that the TRST pin is sorta optional, and the Luminary folks weren't in a mood to dot all their 'i's and cross all their 't's? Is there some reason that you might _not_ want to connect TRST?
I also see that the Olimex board has a solderable bridge to connect TRST to the processor reset. Again -- why, do you know the advantages and disadvantages?
I'm going to just copy the Olimex board, but I'm curious as to just what it is that I am so blindly doing...