48MHz == 500kHz actual clock speed

Hardware MKR Family MKRZero
1

The specification for clock speed for the MKRZERO shows 48MHz, however if I simply toggle a pin the duration of the change is 2uS.

It feels like I have regressed to a 6800 from the 70's, what's up with this?

digitalWrite(5, HIGH);
digitalWrite(5, LOW);
2

Hi JesterJ,

Direct register manipulation should work faster:

REG_PORT_OUTSET1 = PORT_PB11;  // digitalWrite(5, HIGH);
REG_PORT_OUTCLR1 = PORT_PB11;  // digitalWrite(5, LOW);