Hello Everyone. Is there a way to switch on a weak pullup on just one port on a 16F73? I know how to do it on the 12F series and I know OPTION_REG.7=0 will switch on all of them on portb, but I only want portb.1 to have a weak pullup. Thank you.
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Hello Everyone. Is there a way to switch on a weak pullup on just one port on a 16F73? I know how to do it on the 12F series and I know OPTION_REG.7=0 will switch on all of them on portb, but I only want portb.1 to have a weak pullup. Thank you.
From the datasheet.
AndQuote:
Each of the PORTB pins has a weak internal pull-up. A
single control bit can turn on all the pull-ups. This is performed
by clearing bit RBPU (OPTION_REG<7>). The
weak pull-up is automatically turned off when the port
pin is configured as an output.
But I bet you want the other pins to be inputs also?Quote:
2: To enable weak pull-ups, set the appropriate TRIS
bit(s) and clear the RBPU bit (OPTION_REG<7>).
Actually, I'm switching the other portb's back & forth from outputs back to inputs in different areas of the program. I don't believe you can turn the pullups on individually. It's all or none.
Depending on what you are out putting to, an external pull up might be the best solution. Use a high value.
For a weak pull-up, I'd suggest 100K. Otherwise, I'd use 10K.Quote:
Originally Posted by mackrackit