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Section 26 Power-Down Modes
26.4
Sleep Mode
The CPU makes a transition to sleep mode if the SLEEP instruction is executed when the SSBY
bit in SBYCR is cleared to 0 and the LSON bit in LPWRCR is cleared to 0. In sleep mode, CPU
operation stops but the on-chip peripheral modules do not. The contents of the CPU's internal
registers are retained.
Sleep mode is cleared by any interrupt or the RES pin input.
When an interrupt occurs, sleep mode is cleared and interrupt exception handling starts. Sleep
mode is not cleared if the interrupt is disabled, or interrupts other than NMI have been masked by
the CPU.
When the RES pin is driven low and sleep mode is cleared, a transition is made to the reset state.
After the specified reset input time has elapsed, driving the RES pin high causes the CPU to start
reset exception handling.
Rev. 1.00 May 09, 2008 Page 820 of 954
REJ09B0462-0100
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