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r_cac Module Guide Resources

Last Updated:11/21/2017

Question:

Where can I find the references to module guide resources for the r_cac module?

Answer:

Introduction

The CAC (Clock Accuracy Controller) HAL module API interfaces with a clock frequency-measurement circuit capable of monitoring the clock frequency based on a reference-signal input. The reference signal may be an externally supplied clock source or one of several available internal clock sources. An interrupt request may optionally be generated by a completed measurement, a detected frequency error, or a counter overflow. A digital filter is available for an externally supplied reference clock, and dividers are available for both internally supplied measurement and reference clocks. Edge-detection options for the reference clock are configurable as rising, falling, or both.

The frequency of the following clocks can be measured:

• Clock output from main-clock oscillator (main clock)

• Clock output from sub-clock oscillator (sub clock)

• Clock output from high-speed on-chip oscillator (HOCO clock)

• Clock output from mid-speed on-chip oscillator (MOCO clock)

  • Clock output from low-speed on-chip oscillator (LOCO clock)

• Clock output from IWDT-dedicated on-chip oscillator (IWDTCLK clock)

• Peripheral module clock (PCLKB)

The measurement clock is monitored using a reference clock. The reference clock may be an external clock (supplied on the CACREF input pin) or one of the following internal clocks:

• Clock output from main-clock oscillator (main clock)

• Clock output from sub-clock oscillator (sub clock)

• Clock output from high-speed on-chip oscillator (HOCO clock)

• Clock output from mid-speed on-chip oscillator (MOCO clock)

• Clock output from low-speed on-chip oscillator (LOCO clock)

• Clock output from IWDT-dedicated on-chip oscillator (IWDTCLK clock)

• Peripheral module clock (PCLKB)

Module Guide

The CAC HAL module guide is targeted for SSP 1.2.0 and above and the SK-S7G2 Kit.

The most recent versions of the CAC HAL module guide application note, application project and import guide are available here.

Module Guide Resources

  • Content provided as it becomes available.

Known issues

  • Refer to the SSP release notes for known issues, available here.

 

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