DM240002 Microchip Technology, DM240002 Datasheet - Page 32

• Manufacturer Part Number: DM240002
• Description: BOARD DEV EXPLORER 16 44-PIN
• Manufacturer: Microchip Technology
• Series: Explorer 16 44-pinr
• Type: MCUr

Specifications of DM240002

• Contents: Explorer 16 Dev Board, PIC24FJ64GA004 and dsPIC33FJ32GP204 PIM Modules
• Processor To Be Evaluated: PIC24FJ128GA010, dsPIC33FJ256GP710
• Processor Series: PIC 24, dsPIC33
• Data Bus Width: 32 bit
• Interface Type: RS-232
• Silicon Manufacturer: Microchip
• Core Architecture: PIC, DsPIC
• Core Sub-architecture: PIC24, DsPIC33
• Silicon Core Number: PIC24F, DsPIC33F
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: dsPIC30, dsPIC33, PIC32, PIC24FJ, PIC24HJ
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

44-Pin Demo Board User’s Guide
DS41296B-page 28
EXAMPLE 3-8:
3.2.10
New Instructions
Interrupt Sources
Most of the peripherals can generate an interrupt, and some of the I/O pins may be
configured to generate an interrupt when they change state.
When a peripheral needs service or an event occurs, it sets its interrupt flag. Each
interrupt flag is ANDed with its enable bit and then these are ORed together to form a
Master Interrupt. This master interrupt is ANDed with the Global Interrupt Enable (GIE).
See the Interrupt Logic Figure in the PIC16F882/883/884/886/887 Data Sheet
(DS41291) for a complete drawing of the interrupt logic. The enable bits allow the PIC
microcontroller to limit the interrupt sources to certain peripherals.
FIGURE 3-9:
ForeverLoop:
Interrupt Flag
Interrupt Enable
org 0
BSF
MOVLW
MOVWF
CLRF
CLRF
BCF
BTFSS
GOTO
BCF
INCF
MOVF
MOVWF
GOTO
RETFIE
SWAPF
Lesson 10: Interrupts
STATUS,RP0
b'00000111' ; configure Timer0. Sourced from the
OPTION_REG
TRISD
Display
STATUS,RP0
INTCON,T0IF ; wait here until Timer0 rolls over
ForeverLoop
INTCON,T0IF ; flag must be cleared in software
Display,f
Display,w
PORTD
ForeverLoop
Other Interrupt Sources
TIMER0 EXAMPLE
INTERRUPT LOGIC SIMPLIFIED
Return from Interrupt
Swap nibbles in file register
; Bank 1
; Processor clock
; Maximum Prescaler
; Make PortD all output
; Bank 0
; increment display variable
; send to the LEDs
Global Interrupt Enable
© 2007 Microchip Technology Inc.
Master Interrupt