BS2, SPI, 3.3V, level shifter needed?
Hello Forum,
I am having some issues interfacing a BS2 to a 3.3V device via SPI.·After some troubleshooting, I have determined that the issue is related to·the differences in voltage.· ·I understand that there are some 'level shifter' IC's on the market that will translate voltages in a way that is very predictable and robust enough for use with SPI.
Anyone used a level shifter before w/ a BS2 for SPI?· Can you share the partnumber??
My current approach: I have tried using resistors, and also voltage dividing circuits, which works...·but I am not getting the results that I want (there is some noise in the signal).·
Regards!
I am having some issues interfacing a BS2 to a 3.3V device via SPI.·After some troubleshooting, I have determined that the issue is related to·the differences in voltage.· ·I understand that there are some 'level shifter' IC's on the market that will translate voltages in a way that is very predictable and robust enough for use with SPI.
Anyone used a level shifter before w/ a BS2 for SPI?· Can you share the partnumber??
My current approach: I have tried using resistors, and also voltage dividing circuits, which works...·but I am not getting the results that I want (there is some noise in the signal).·
Regards!
Comments
http://www.pericom.com/pdf/applications/AN066.pdf#search="level shifters"
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Think outside the BOX!
Although this Philips level translator IC was originally designed for use with an I2C bus, there is no reason why it won't work for an SPI bus equally well. Here is a link to the product:
http://www.nxp.com/pip/GTL2002_4.html
Have fun!
Regards,
Bruce Bates
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