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Altera_Forum's avatar
Altera_Forum
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13 years ago

pwm input

hi, i'm using an ultrasonic sensor for my project where the sensor has PWM output. i would like to connect the sensor to de2 board. i'm already done the programming part. can anyone helps me how to c...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

pwm is a digital signal, so you can connect to any fpga i/o pin: actual pwm signal processing is done inside fpga, then you'll freely code it with hdl.

The important point you must consider is signal levels: fpga I/Os on de2 board use 3.3V LVTTL standard; if your sensor output is 5V or 24V you definitely need a voltage level translator.