Section 18 Power-Down States
Rev.2.00 Jun. 28, 2007 Page 574 of 666
REJ09B0311-0200
18.5 Sleep
Mode
18.5.1
Transition to Sleep Mode
When the SLEEP instruction is executed when the SSBY bit in SBYCR is 0, the CPU enters sleep
mode. In sleep mode, CPU operation stops but the contents of the CPU's internal registers are
retained. Other peripheral functions do not stop.
18.5.2
Clearing Sleep Mode
Sleep mode is exited by any interrupt, signals on the
RES
or
STBY
pin, and a reset caused by a
watchdog timer overflow.
1. Clearing by interrupt
When an interrupt occurs, sleep mode is exited and interrupt exception processing starts. Sleep
mode is not exited if the interrupt is disabled, or interrupts other than NMI are masked by the
CPU.
2. Clearing by
RES
pin
Setting the
RES
pin level low selects the reset state. After the stipulated reset input duration,
driving the
RES
pin high makes the CPU start the reset exception processing.
3. Clearing by
STBY
pin
When the
STBY
pin level is driven low, a transition is made to hardware standby mode.
4. Clearing by reset caused by watchdog timer overflow
Sleep mode is exited by an internal reset caused by a watchdog timer overflow.
Содержание H8SX/1650
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Страница 106: ...Section 4 Exception Handling Rev 2 00 Jun 28 2007 Page 84 of 666 REJ09B0311 0200...
Страница 142: ...Section 5 Interrupt Controller Rev 2 00 Jun 28 2007 Page 120 of 666 REJ09B0311 0200...
Страница 326: ...Section 8 I O Ports Rev 2 00 Jun 28 2007 Page 304 of 666 REJ09B0311 0200...
Страница 470: ...Section 12 Watchdog Timer WDT Rev 2 00 Jun 28 2007 Page 448 of 666 REJ09B0311 0200...
Страница 546: ...Section 13 Serial Communication Interface SCI Rev 2 00 Jun 28 2007 Page 524 of 666 REJ09B0311 0200...
Страница 566: ...Section 14 A D Converter Rev 2 00 Jun 28 2007 Page 544 of 666 REJ09B0311 0200...
Страница 574: ...Section 16 RAM Rev 2 00 Jun 28 2007 Page 552 of 666 REJ09B0311 0200...
Страница 584: ...Section 17 Clock Pulse Generator Rev 2 00 Jun 28 2007 Page 562 of 666 REJ09B0311 0200...
Страница 638: ...Section 19 List of Registers Rev 2 00 Jun 28 2007 Page 616 of 666 REJ09B0311 0200...
Страница 668: ...Section 20 Electrical Characteristics Rev 2 00 Jun 28 2007 Page 646 of 666 REJ09B0311 0200...
Страница 676: ...Appendix Rev 2 00 Jun 28 2007 Page 654 of 666 REJ09B0311 0200...
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