PIC 16Fx a RBIE,RBIF

[Snail Instruments]

>Mam jeden problem s PIC a vyuzitim preruseni od horni poloviny portu b pri 
>zmene na techto pinech.
>V manualu jsem se docetl, ze je potreba pred pouzitim a povolenim RBIE a 
>nulovani RBIF zapsat nebo cist na port b.

Ale ve schematu k pinu je nakresleno pouze RD portb. Pred kazdym nulovanim 
RBIF je treba precist portB, tim se obnovi soulad obou klopnych obvodu a 
vymizi pricina opakovaneho nastaveni RBIF. Pak je mozne RBIF vynulovat. 
Jeste si dobre proctete omezeni:

The interrupt-on-change feature is recommended for
wake-up on key depression operation and operations
where PORTB is only used for the interrupt-on-change
feature. Polling of PORTB is not recommended while
using the interrupt-on-change feature.

J. Hanzal