AX92352/AX92353 2-CH Encoder Card with Real-time Trigger I/O
16
Operating
The figure below depicts a case where a valid encoder value is pulse edge from phase A
encoder signal. The 1/2, 1/3 or 1/4 mode defines the number of pulses to skip between
valid acquisition. After the following pulses meet mode setting, the encoder value will be
increasing (As defined by the selection of 1/2, 1/3 or 1/4 mode).
4.1.2
De-bounce filter
Each encoder channel supports de-bounce filter function to reject noise. The de-bounce
filter can define the interval width for high/low signals. Signals with interval width less
than the defined value will be filtered out.
Below is a diagram illustrating the case of a filter timer set with a duration time of 1
microsecond:
Encoder
input
signal
Filtered
signal
<1us
1us
<1us
1us
<1us
