topic 5V tolerant I/O on MCF5223x ? in ColdFire/68K Microcontrollers and Processors

5V tolerant I/O on MCF5223x ?

lambtron — Thu, 02 Nov 2006 06:21:43 GMT

Is the general purpose i/o on mcf5223x microcontrollers 5V tolerant?

Also, where can I find this and other electrical specs for this processor family? I have looked in the Reference Manual and many other available documents but can't find electrical specs anywhere.

Re: 5V tolerant I/O on MCF5223x ?

Nouchi — Thu, 02 Nov 2006 16:46:15 GMT

Hello,

Unfortunately, MCF5223x are not 5V I/O tolerant see:
http://www.freescale.com/files/32bit/doc/data_sheet/MCF52235DS.pdf
chapter 2.3 table 22

Emmanuel

Re: 5V tolerant I/O on MCF5223x ?

DrSeuss — Thu, 09 Nov 2006 23:49:55 GMT

While not strictly 5v tolerant - 5V signals can be connected as long as there is a series resistor to limit the current flow into the pin. The pin will clamp the input to 3.6V, as long as the resistor limits the input current (<2mA) 5V signals can connect to the 3.3v pins.