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CHAPTER 7 INTERRUPT
7.9
Sample Programs for Interrupt Processing
This section contains sample programs for interrupt processing.
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Sample Programs for Interrupt Processing
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Processing specifications
The following is a sample program for an interrupt that uses external interrupt 0 (INT0).
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Sample coding
DDR1 EQU 000011H ;Port 1 direction register
ENIR EQU 030H ;Interrupt/DTP enable register
EIR EQU 031H ;Interrupt/DTP flag
ELVR EQU 032H ;Request level setting register
ICR04 EQU 0B4H ;Interrupt control register
STACK SSEG ;Stack
RW 100
STACK_T RW 1
STACK ENDS
;---------Main program ---------------------------------------------------------------------------------------------------
CODE CSEG
START:
MOV RP,#0 ;General-purpose registers use the first bank
MOV ILM, #07H ;Sets ILM in PS to level 7
MOV A, #!STACK_T ;Sets system stack
MOV SSB, A
MOVW A, #STACK_T ;Sets stack pointer, then
MOVW SP, A ;Sets SSP because S flag = 1
MOV DDR1, #00000000B ;Sets P10/INT0 pin to input
OR CCR, #40H ;Sets I flag of CCR in PS, enables interrupts
MOV I:ICR04, #00H ;Sets interrupt level to "0" (highest priority)
MOV I:ELVR, #00000001B ;Requests that INT0 be made level H
MOV I:EIRR, #00H ;Clears INT0 interrupt cause
MOV I:EIRR, #01H ;Enables INT0 input
:
LOOP: NOP ;Dummy loop
NOP
NOP
Summary of Contents for MB90460 Series
Page 1: ...The following document contains information on Cypress products ...
Page 3: ......
Page 5: ......
Page 9: ...iv ...
Page 41: ...22 CHAPTER 1 OVERVIEW ...
Page 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Page 83: ...64 CHAPTER 3 CPU ...
Page 95: ...76 CHAPTER 4 RESET ...
Page 107: ...88 CHAPTER 5 CLOCK ...
Page 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 175: ...156 CHAPTER 7 INTERRUPT ...
Page 181: ...162 CHAPTER 8 MODE SETTING ...
Page 223: ...204 CHAPTER 9 I O PORT ...
Page 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Page 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Page 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Page 485: ...466 CHAPTER 16 PWC Timer ...
Page 531: ...512 CHAPTER 17 UART ...
Page 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Page 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Page 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Page 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Page 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Page 715: ...696 APPENDIX ...
Page 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 739: ......