PIC 18 IO internal weak pull-ups
Programming WPUR — Debut pic — Episode#09
Pull-up resistors are very common when using microcontrollers (MCUs) or any digital logic device. ❤ git
This tutorial will explain when and how to use pull-up resistors on the PIC18 Family.
For PIC18F4520
PORTB can be software programmed for internal weak pull-ups on all inputs.
For PIC18F45K202
Each of the PORTB pins has an individually controlled weak internal pull-up. When set, each bit of the WPUB register enables the corresponding pin pull-up. When cleared, the RBPU bit of the INTCON2 register enables pull-ups on all pins which also have their corresponding WPUB bit set.
When set, the RBPU bit disables all weak pull-ups.
The weak pull-up is automatically turned off when the port pin is configured as an output. The pull-ups are disabled on a Power-on Reset.
Here is the code:
In the next lesson let’s understand the Button Library from mikroC compiler :)
And that’s it!
Thanks a lot! See you in the next episode.
Bye!
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2º Episode — IO: Debut pic — Pic 18 Push & Blink an LED — Let’s Unveil IO’s PIC18 Capabilities
3º Episode — IO: Debut pic — PIC 18 Push & Debounce! — Treating buttons’ Debounce
4º Episode — IO: Debut pic — PIC 18 Lighting LEDs In a Row! — Nice Special Effect
5º Episode — IO: Debut pic — PIC 18 Chasing LEDs — The net result is that LEDs seem to be chasing each other
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8º Episode — IO: Debut pic — PIC 18 Random Flashing— Generating a random number
9º Episode — IO: Debut pic — PIC 18 internal weak pull-ups— How to programming WPUR
10º Episode — IO: Debut pic — Button Library — How to use mikroC PRO for PIC library
11º Episode — IO: Debut pic — Up Down Counter — How to use mikroC PRO for PIC library
