Part a) Two clock technologies used in microcontroller are the crystal and the R

ID: 2315788 • Letter: P

Question

Part a) Two clock technologies used in microcontroller are the crystal and the RC-circuit. For each of them, comment on:

• Startup speed (after the clock has been disabled for a while)

• Accuracy

• Stability with respect to temperature and voltage variations

Part b) One clock source in MSP430 is the DCO.

• What does DCO stand for?

• What is the underlying technology of the DCO?

• By what means can the DCO be configured to change its clock frequency?

Part c) What is a typical MSP430 configuration?

• The CPU uses MCLK that is sourced from the ...

• The timer uses ACLK that is sourced from the ...

Part b)

DCO stands for Digital Controlled Oscillator.

The underlying technology of the DCO is Mesos technology.

The DCO be configured to change its clock frequency by DCOTUNE value by one step.