Barometer Pressure Module HOPE HP03

[dhouston]

Thanks for the infirmation.

It seems that the pins are NOT 5 Volt tolerant and I either:

1. Use the bi-directional level converting circuit given in the Philips application note, or
2. Run the MCU at 3 Volts.

There are some simpler methods than those in the Philips app note. See Interfacing to Lower Voltage Devices on pp10-11 of http://www.zbasic.net/appNotes/AN213.pdf. The transistor (e.g. 2N3904) circuits of FIG 15 will work for nearly anything.