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CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE
19.3
Operation of the Delayed Interrupt Generator Module
When software causes the CPU to write "1" to the relevant bit of DIRR, the request latch
in the delayed interrupt generator module is set and an interrupt request is generated to
the interrupt controller.
■
Operation of the Delayed Interrupt Generator Module
When software causes the CPU to write "1" to the relevant bit of DIRR, the request latch in the delayed
interrupt generator module is set and an interrupt request is generated to the interrupt controller. If the
priority of other interrupt requests is lower than that of this interrupt or no other interrupt request is
generated, the interrupt controller generates an interrupt request to the F
2
MC-16LX CPU. The F
2
MC-
16LX CPU compares the ILM bit of the internal CCR register and the interrupt request. When the request
level is higher than that of the ILM bit, the CPU starts the hardware interrupt processing microprogram
immediately after execution of the current instruction ends. As a result, the interrupt processing routine for
this interrupt is executed. This interrupt cause is cleared and task switching is done by writing "0" to the
relevant bit of DIRR in the interrupt processing routine. Figure 19.3-1 Operation of the delayed interrupt
generator module shows the operation of the delayed interrupt generator module.
Figure 19.3-1 Operation of the Delayed Interrupt Generator Module
DIRR
ICR xx
ICR yy
CMP
ILM
IL
NTA
CMP
WRITE
Delayed interrupt generation module
Delayed interrupt controller
Other requests
F
2
MC-16LX CPU
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: ......