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CHAPTER 18 DTP/EXTERNAL INTERRUPT CIRCUIT
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Switching between the external interrupt function and the DTP function
Switching between the external interrupt function and the DTP function is accomplished by the ISE bit of
the corresponding interrupt control register (ICR). If the ISE bit is "1", the extended intelligent I/O service
(EI
2
OS) is enabled and the circuit executes its DTP function. If it is "0", EI
2
OS is disabled and the circuit
executes the its external interrupt function.
Note:
If multiple interrupt requests are assigned to a single ICR register, the interrupt level (IL2 to IL0) is
common to all of the interrupt requests. As a rule, when one interrupt request uses EI
2
OS, the other
interrupt requests cannot use it.
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Operation of the DTP/external Interrupt Circuit
Table 18.5-1 shows the control bits and interrupt causes of the DTP/external interrupt circuit.
When DTP/external input requests are set, the resource will generate an interrupt request signal to the
interrupt controller whenever an interrupt cause indicated in the request level setting register (ELVR) is
received at the corresponding pin. If the ISE bit is "0", the interrupt processing microprogram is executed.
If it is "1", the extended intelligent I/O service handling (DTP handling) microprogram is executed.
Table 18.5-1 Control Bit and Interrupt Cause of the DTP/external Interrupt Circuit
DTP/external interrupt circuit
Interrupt request flag bit
EIRR: ER7 to ER0
Interrupt request enable bit
ENIR: EN7 to EN0
Interrupt cause
Input of an effective edge or level to pin INT7 to INT0
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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