how to read a word in one clock cycle

[yklein]

Hi,

I'm using MC9S12DP256, and in the Freescale manual it says when using PACA (16-bit pulse accumulator) "Full count register access should take place in one clock cycle. A
separate read/write for high byte and low byte will give a different result
than accessing them as a word."

My question is what's the command in C to read the word in one clock cycle?

[Lundin]

In your register map, the timer registers should be defined as

volatile unsigned int TC0;

Which will solve the problem.

If you don't have a proper register map, you would have to do something like:

#define TC0 (*(volatile unsigned int*)0x0050)