A2D pins?

Hi,

Im new to analog to digital and I just wanted some clarification. For A2D, can I use any analog pin on the pic, for example on my pic:

**broken link removed**

Can I use any of the port A pins? Because im not using the comparator, I only need the 1 wire connection to the analog device, I dont need any extra pins or anything?

You can use any of these RB6,RB7, and RA0 to RA4 with this chip

Spadez said:

Hi,

Im new to analog to digital and I just wanted some clarification. For A2D, can I use any analog pin on the pic, for example on my pic:

**broken link removed**

Can I use any of the port A pins? Because im not using the comparator, I only need the 1 wire connection to the analog device, I dont need any extra pins or anything?

Click to expand...

Hi,

The simple answer for that chip is Yes.

However be aware that not all Pic chips allow you to select any A2D port as you can on the F88.
Many other chips only allow you to enable the Analogue function in a strict sequence.
See the ADCON1 register in the 16F877 datasheet.

Also be aware that you may need to use the Vref+ & - pins for more complex A2D work.

Nigels A2D Assembler Tutorial will still give you a good idea of the function of the A2D port; he does also show the hardware for using a voltage reference and an op amp buffer, though neither are needed for many simple analogue sources.