title: STM32F3 High Resolution Timer
body: <p>I'm looking to develop an ultrasonic time-of-flight (ToF) sensor and have been looking at high speed timing circuits. Many versions use the TDC7200, but ST offers the <a href="http://www.st.com/en/microcontrollers/stm32f334.html?querycriteria=productId=LN1820" rel="nofollow noreferrer">STM32F334</a> which has a high-resolution timer with apparent <strong>217ps resolution</strong>.</p>
  
  <p>What I'm wondering whether this timer can actually be used to <em>measure time with 217ps between each count value</em> (assuming it's run at maximum clock rate)?</p>
  
  <p>Does anyone have experience using this microcontroller's high-resolution timer like this?</p>