SPI at 3.3v

[sturgessb]

Hello all

I'm getting nothing back other than 255 when querying a SPI sensor (mpu6000), via hardware SPI on a zx24n, and just wondering if running the zx at 3.3v would cause any issues with SPI coms?

Normally everything is fine at 3.3v, but perhaps SPI is different for some reason?

B

[dkinzer]

wondering if running the [ZX-24n] at 3.3v would cause any issues with SPI coms?

That supply voltage is too low for a ZX running at 14.7MHz. In such a case, the device may behave in any manner it sees fit.

You're best advised to use a ZX running at 7.37MHz *or* run the ZX at 5V and use level converters on the SPI signals.