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CHAPTER 8 LOW-POWER CONTROL CIRCUIT
■
Release of Sleep Mode
The low-power consumption control circuit releases sleep modes when a reset is input or an interrupt
occurs.
●
Return by a reset
A sleep mode is initialized to the main clock mode by a reset.
●
Return by an interrupt
If an interrupt request of level seven or higher is issued from a peripheral circuit during a sleep mode, the
sleep mode is released. After the mode is released, the interrupt is handled as an ordinary interrupt. If the
interrupt is accepted according to the setting of the I flag of the condition code register (CCR), interrupt
level mask register (ILM), and interrupt control register (ICR), the CPU executes the interrupt processing.
If the interrupt is not accepted, the CPU executes the instruction following the instruction specifying the
sleep mode.
Figure 8.5-1 shows the release of a sleep mode when an interrupt occurs.
Figure 8.5-1 Release of Sleep Mode by Interrupt Occurrence
Note:
When interrupt processing is executed, the CPU normally executes the instruction that follows the
instruction in which switching to a sleep mode has been specified. The CPU then proceeds to
interrupt processing. If the switching to sleep mode and acceptance of an external bus hold request
occur at the same time, however, the CPU may proceed to interrupt processing before executing the
next instruction.
Interrrupt from peripheral function
Set the enable flag.
INT occurrence?
(IL smaller than 7)
Interrupt is executed.
Sleep mode is
not released.
Next instruction
is executed.
Sleep mode is
released.
Sleep mode is
not released.
ILM smaller than IL
IL smaller than 7
Next instruction
is executed.
NO
YES
NO
NO
YES
YES
I=0
Содержание MB90390 Series
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Страница 17: ...xiii APPENDIX D List of Interrupt Vectors 690 INDEX 695 ...
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Страница 132: ...104 CHAPTER 5 CLOCKS ...
Страница 152: ...124 CHAPTER 6 CLOCK MODULATOR ...
Страница 210: ...182 CHAPTER 11 TIME BASE TIMER ...
Страница 218: ...190 CHAPTER 12 WATCHDOG TIMER ...
Страница 264: ...236 CHAPTER 14 16 BIT RELOAD TIMER WITH EVENT COUNT FUNCTION ...
Страница 274: ...246 CHAPTER 15 WATCH TIMER ...
Страница 306: ...278 CHAPTER 17 DTP EXTERNAL INTERRUPTS ...
Страница 338: ...310 CHAPTER 18 8 10 BIT A D CONVERTER ...
Страница 364: ...336 CHAPTER 19 UART0 UART1 ...
Страница 398: ...370 CHAPTER 20 UART2 UART3 Figure 20 5 2 ORE Set Timing Receive data RDRF ORE ...
Страница 432: ...404 CHAPTER 20 UART2 UART3 ...
Страница 482: ...454 CHAPTER 22 SERIAL I O ...
Страница 560: ...532 CHAPTER 24 STEPPING MOTOR CONTROLLER ...
Страница 582: ...554 CHAPTER 27 ROM MIRRORING MODULE ...
Страница 632: ...604 CHAPTER 29 EXAMPLES OF SERIAL PROGRAMMING CONNECTION ...
Страница 722: ...694 APPENDIX ...
Страница 723: ...695 INDEX The index follows on the next page This is listed in alphabetic order ...
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