topic Re: I/O input voltage tolerance in i.MX Processors

I/O input voltage tolerance

robertinant — Fri, 09 Nov 2012 21:16:14 GMT

I need to interface to a i.MX35x processor from a 2.5 volt device.

The i.MX35x I/O Supply voltage is @ 1.8 Volt.

What is the tolerance on the i.MX35x I/O's? e.g. can I directly drive the I/O with 2.5 volt?

Thanks

Re: I/O input voltage tolerance

4guin4g4 — Tue, 13 Nov 2012 19:07:13 GMT

According to the Datasheet Table 7

http://cache.freescale.com/files/dsp/doc/data_sheet/MCIMX35SR2CEC.pdf?pspll=1

Supply voltage (I/O) NVCCmax –0.5 to 3.6 V

Re: I/O input voltage tolerance

david_babin — Wed, 14 Nov 2012 15:04:56 GMT

An I/O supplied with 1.8 V cannot be overdriven at 2.5 V. The i.MX35 is similar to other i.MX devices and should not be overdriven > 0.3 V above the associated I/O supply rail. A change ticket will be submitted to correct the data sheet.