Reserved registers

kbrown · ‎2002-12-05

Posted on December 06, 2002 at 04:31

Reserved registers

kbrown · ‎2011-05-17

Posted on May 17, 2011 at 11:33

Does anyone know if there is there any side effect of reading a register which is not defined? I'm particularly interested in the 92163.

In order to ensure that I have completely initialized the processor correctly, I want to report the state of all registers once I have completed initialization. It is simpler to just read all registers rather than add code to limit the reads to defined registers. I don't care what undefined registers report, I just want to know if there is any side effect?

Thanks!

romain2399 · ‎2011-05-17

Posted on May 17, 2011 at 11:33

Several Registers have an ''Intrusive Read'' mode, you can see it when you use the Peripheral Register Window in the debugger. That means that you may reset a flag by reading these registers. You should check each one of them.

I do not think that any hidden register with impredectible impact when read exists.