I am using Arm Project Manager (APM) for writing the firmware in my ARM board. My question is: What are the live debugging features available in APM? Let's say I need to inspect the value at some pin of the CPU.
Any tutorial / video is helpful.
The APM doesn't include a debugger. You need to use the debugger supplied in the ARM Software Development Toolkit.
I use the Rowley CrossWorks tools for ARM development. They come with an excellent debugger, which uses many of the more popular JTAG interfaces.