fastgrandad
New Member
I want to use an 18M2 ADC and improve the measurement accuracy with an external 1% reference 4.096V voltage source. The Picaxe manual 2 p.31 states that the Vref+ input is n/a for the 18M2, only Vref-, however the datasheet for the PIC16F1847 shows that both are available on the original Pic chip (+ on pin 2, - on pin 1). Has there been a change and the Vref+ input is now available or has the pin been reassigned for Picaxe? The 14M2 doesn't have enough I/O and I know I can buy a 20M2 but already have a bag of 18 pin devices.
Thanks
Paul
Thanks
Paul