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CHAPTER 7 INTERRUPT
7.4.3
Procedure for using Hardware Interrupt
Before hardware interrupt can be used, the system stack area, peripheral function, and
interrupt control register (ICR) must be set.
■
Procedure for using Hardware Interrupt
Figure 7.4-4 shows an example of the procedure for using hardware interrupt.
Figure 7.4-4 Procedure for using Hardware Interrupt
(1) Set the system stack area.
(2) Initialize a peripheral function that can generate interrupt requests.
(3) Set the interrupt control register (ICR) in the interrupt controller.
(4) Set the peripheral function to the operation start status, and set the interrupt enable bit to enable.
(5) Set the interrupt level mask register (ILM) and interrupt enable flag (I) to interrupt acceptable.
(6) An interrupt generated in the peripheral function causes a hardware interrupt request.
(7) The interrupt processing hardware saves the registers and branches to the interrupt processing program.
(8) The interrupt processing program processes the peripheral function in response to the generated
interrupt.
(9) Clear the peripheral function interrupt request.
(10) Execute the interrupt return instruction, and return to the program before branching.
(1)
(2)
(3)
(4)
(5)
(6)
(7)
(8)
(9)
(10)
Start
Set operation start for the
peripheral function. Set the
interrupt enable bit to enable
Set the ICR in the interrupt
controller
Initialize the peripheral function
Set the system stack area
Set the ILM and I in the PS
Main program
Interrupt request
generated
Hardware
processing
Main program
Stack processing branches to
the interrupt vector
Processing for interrupt to the
peripheral function (execute the
interrupt processing routine)
Interrupt processing program
Clear the interrupt cause
Interrupt return instruction
(RETI)
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 ...
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