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CHAPTER 7 INTERRUPT
●
Interrupt handling time (
φ
machine cycle)
The CPU saves dedicated registers to the system stack and fetches interrupt vectors after it receives an
interrupt request. The required handling time for this processing is f machine cycles. The interrupt
handling time is calculated with the following formula:
When an interrupt is activated:
θ
= 24 + 6 + Z machine cycles
When control is returned from an interrupt:
θ
= 11 + 6 + Z machine cycles (RETI instruction)
The interrupt handling time is different for each address pointed to by the stack pointer.
Table 7.4-3 shows the interpolation values (Z) for the interrupt handling time.
Reference:
One machine cycle corresponds to one clock cycle of the machine clock (
φ
).
Table 7.4-3 Interpolation Values (Z) for the Interrupt Handling Time
Address pointed to by the stack pointer
Interpolation value (Z)
External 8-bit
+4
External even-numbered address
+1
External odd-numbered address
+4
Internal even-numbered address
0
Internal odd-numbered address
+2
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: ......