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r_cac Module Guide Resources

Last Updated:08/03/2017

Question:

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

Answer:

Introduction

The CAC (Clock Accuracy Controler) 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 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

There are no additional resources for the r_cac module currently.

Known issues

  • Refer to the SSP release notes for known issues, available here.
SSP 1.2.0 and above
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