Question

How the additional registers are accessed in the OnCE?

(a) parallel port

(b) serial port

(c) jtag

(d) address register

I have been asked this question during an interview.

The doubt is from Emulation Techniques topic in chapter Emulation and Debugging Techniques of Embedded Systems

Answer 1

Right option is (b) serial port

For explanation: The on-chip emulation can access additional registers by using a special serial port within the device that provides control over the processor and access to its internal registers.