ATTiny88 CLKI (PB6) declared to be 12MHz, but works on 16MHz.
My ATTiny board looks like this:
There is 16MHz external clock (the square in the middle), the board works fine on this frequency. Declared for Arduino (but you can remove it), enjoy the beauty of 26 I/O pins. Mind, the sink/source current is generally less -except PD3210- than in other Tiny or Mega.
Chip looks like 32 QFN, marking is :
T88 - 15MZ
Problem is that datasheet specifies only 12MHz on CLKI.
I know for overclocking, I did 17MHz on M16, but here the difference is significant, how it can be, please.