I have been using a Cypress FM3 Series Processor for the last 6 months,
unfortunately I am facing a problem now. The Successive Approximation
(SAR)ADC Peripheral does not have a dedicated "trigger/switch" to stop
sampling at an instance in time. That is, "Track and Hold" is not
dsPIC33 and PIC24 Series have a dedicated Trigger to Stop Sampling at an
instant, thereby allowing "Track and Hold".
I have looked into various ARM cortex M controllers but they seem to
lack this feature. Can anyone correct me and guide me if such a
microcontroller exists with ARM Cortex M based core.
My Goal is to measure the Amplitude of a Voltage Spike. The Sampling
will be stopped by a trigger at the precise moment where the Spike
almost achieves its Maximun Value. After the sample has been taken, the
ADC Converter can take the required time to analyze the sampled value.
I would be happy to receive advice on this.