I noticed that my VCC line is reading 1.5V even in the absence of main power.
Only connection present is TX, RX and GND connection from a silicon labs USB to TTL converter.
Am reading 2.2V approx at pin PA21 from the USB to TTL converter.
GND & PB4 pins are at ground potential.
This is the only connection left & the TX & RX pins runs directly to the sam E70 & there are no pullups present.
Then what could be cause of 1.5V that I am reading at the vcc pin?