> Hi, > > for a prototype I want to connect the msp with some i/o signals from an > 5V supplied i/o board. Is it possible to use 5V for the msp (I know > there are chips do do 3.3V to 5V signal conversion)? > > Thanks, > Peter >
For simple systems, you can normally use a 3.3V output from the msp430 to drive a 5V ttl/cmos input directly. For signals the other way, use a series resistor and a diode to 3.3V to limit the voltage (the msp430's internal ESD protection diodes may be enough if the resistor is large enough). I wouldn't advise running the msp430 itself at 5V, although I once accidently ran one at about 6.5V (the system was using a 3.3V linear regulator, but the mps430 was using so little current that the regulator could not work - the solution was to add a 10k resistor between 3.3V and 0V lines...).
