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Friday, September 12th, 2008 at 00:55 | No comments

Categories: SCM

Tags: interrupt routine, PIC, PORTB

Short Content: 1 summary     All middle-grade series PIC monolithic integrated circuit, the PORTB port highest 4 pins (RB7~RB4) when supposes for the input pattern, when the input level from high to low or from low to high changes, may let the monolithic integrated circuit have the interrupt. This is the usually called pin change of state interrupt.    When design pin interrupt routine, three need special attention place. First, before eliminating P0RTB interrupts flag bit RBIF, must arrange one essentially, as the ...