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Section 6 Power-Down Modes
Rev. 4.00 Sep. 14, 2005 Page 171 of 982
REJ09B0023-0400
6.3 Operation
6.3.1 Sleep
Mode
1. Transition to Sleep Mode
Executing the SLEEP instruction when the STBY bit in STBCR is 0 causes a transition from
the program execution state to sleep mode. Although the CPU halts immediately after
executing the SLEEP instruction, the contents of its internal registers remain unchanged. The
on-chip modules continue to run in sleep mode, but the on-chip memory is not accessible. If
the on-chip memory is accessed by, for example, the DMAC, the access is ignored and the
value read is not defined. Clock pulses continue to be output on the CKIO and CKIO2 pins. In
sleep mode, a high signal and low signal are output from the STATUS1 and STATUS0 pins,
respectively.
2. Canceling Sleep Mode
Sleep mode is canceled by an interrupt (
NMI
,
IRQ
, and on-chip peripheral module) or reset.
Interrupts are accepted in sleep mode even when the BL bit in the SR register is 1. If
necessary, save SPC and SSR to the stack before executing the SLEEP instruction.
•
Canceling with an Interrupt
When an
NMI
,
IRQ
, or on-chip peripheral module interrupt occurs, sleep mode is canceled and
interrupt exception handling is executed. A code indicating the interrupt source is set in the
INTEVT2 registers.
•
Canceling with a Reset
Sleep mode is canceled by a power-on reset or a manual reset.
Summary of Contents for HD6417641
Page 2: ...Rev 4 00 Sep 14 2005 Page ii of l...
Page 7: ...Rev 4 00 Sep 14 2005 Page vii of l...
Page 11: ...Rev 4 00 Sep 14 2005 Page xi of l USB Universal serial bus WDT Watch dog timer...
Page 12: ...Rev 4 00 Sep 14 2005 Page xii of l...
Page 28: ...Rev 4 00 Sep 14 2005 Page xxviii of l...
Page 204: ...Section 4 Clock Pulse Generator CPG Rev 4 00 Sep 14 2005 Page 154 of 982 REJ09B0023 0400...
Page 212: ...Section 5 Watchdog Timer WDT Rev 4 00 Sep 14 2005 Page 162 of 982 REJ09B0023 0400...
Page 228: ...Section 6 Power Down Modes Rev 4 00 Sep 14 2005 Page 178 of 982 REJ09B0023 0400...
Page 246: ...Section 8 X Y Memory Rev 4 00 Sep 14 2005 Page 196 of 982 REJ09B0023 0400...
Page 318: ...Section 11 User Break Controller UBC Rev 4 00 Sep 14 2005 Page 268 of 982 REJ09B0023 0400...
Page 454: ...Section 12 Bus State Controller BSC Rev 4 00 Sep 14 2005 Page 404 of 982 REJ09B0023 0400...
Page 504: ...Section 14 U Memory Rev 4 00 Sep 14 2005 Page 454 of 982 REJ09B0023 0400...
Page 566: ...Section 17 Compare Match Timer CMT Rev 4 00 Sep 14 2005 Page 516 of 982 REJ09B0023 0400...
Page 868: ...Section 21 A D Converter Rev 4 00 Sep 14 2005 Page 818 of 982 REJ09B0023 0400...
Page 914: ...Section 23 I O Ports Rev 4 00 Sep 14 2005 Page 864 of 982 REJ09B0023 0400...
Page 956: ...Section 24 List of Registers Rev 4 00 Sep 14 2005 Page 906 of 982 REJ09B0023 0400...
Page 1016: ...Section 25 Electrical Characteristics Rev 4 00 Sep 14 2005 Page 966 of 982 REJ09B0023 0400...
Page 1024: ...Appendix Rev 4 00 Sep 14 2005 Page 974 of 982 REJ09B0023 0400...
Page 1032: ...Rev 4 00 Sep 14 2005 Page 982 of 982 REJ09B0023 0400 X X Y data addressing 52 X Y memory 193...
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