Rainer Posted March 17, 2015 Share Posted March 17, 2015 I am trying to use older PAL devices with a Vcc requirement of 5 V on the EE . When using a Switch or Push Button in the Static I/O Module, the output levels are: HIGH: 3.3 V LOW: 1.6 V The low level is obviously too high. Is EE's Static I/O not intended for 5 V? Link to comment Share on other sites More sharing options...
attila Posted March 18, 2015 Share Posted March 18, 2015 The digital IO pins use LVCMOS3V3 standard. These are supplied at 3.3V and have protection: 200 Ohm thermistor and clamping diodes to GND and to 3.3V The low level in your experiment is probably pulled up to 1.6V by the device you are testing. Link to comment Share on other sites More sharing options...
Rainer Posted March 18, 2015 Author Share Posted March 18, 2015 You were right. Thank you. Link to comment Share on other sites More sharing options...
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Rainer
I am trying to use older PAL devices with a Vcc requirement of 5 V on the EE .
When using a Switch or Push Button in the Static I/O Module, the output levels are:
HIGH: 3.3 V
LOW: 1.6 V
The low level is obviously too high.
Is EE's Static I/O not intended for 5 V?
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