SH7146 Datasheet, PDF (898/1022 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 22 Power-Down Modes
22.4 Sleep Mode
22.4.1 Transition to Sleep Mode
Executing the SLEEP instruction when the STBY bit in STBCR1 is 0 causes a transition from the
program execution state to sleep mode. However, sleep mode cannot be entered when the bus is
released (low-level input to BREQ pin). Although the CPU halts immediately after executing the
SLEEP instruction, the contents of its internal registers remain unchanged. The on-chip peripheral
modules continue to operate.
22.4.2 Canceling Sleep Mode
Sleep mode is canceled by a reset.
Do not cancel sleep mode with an interrupt.
Canceling with Reset: Sleep mode is canceled by a power-on reset with the RES pin, a manual
reset with the MRES pin, or an internal power-on/manual reset by WDT.
Rev. 3.00 May 17, 2007 Page 854 of 974
REJ09B0229-0300