Objective Development Forums

Just wondering. The basic design shows the tiny2313 (or other AVRs) with 12Mhz clock at VCC 3.3V. But (all known) datasheets only permits clock frequencies >10Mhz only to VCC from 4.5 to 5.5V.
When i use the lower rate at 3v, is this an supported "overclocking" of the MCU?

Tommi

If you stick with the words of the data sheet, yes, then this is overclocking.

There are AVRs with a more precise specification of supply voltage vs. allowed clock (in a diagram). Since the rating is consistent with the values given in other AVR data sheets, we assume that the other AVRs have a similar characteristics. See, for instance, the ATMega88 data sheet on page 302, section "Maximum Speed vs. VCC".