h8s-2649 Renesas Electronics Corporation., h8s-2649 Datasheet - Page 619

• Manufacturer Part Number: h8s-2649
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

21.3
When the SLEEP instruction is executed when the SSBY bit in SBYCR = 0 and the LSON bit in
LPWRCR = 0, the CPU enters the sleep mode. In sleep mode, CPU operation stops but the
contents of the CPU's internal registers are retained. Other peripheral modules do not stop.
Sleep mode is canceled by any interrupt, or signals at the RES or STBY pin.
When an interrupt occurs, sleep mode is canceled and interrupt exception handling starts. Sleep
mode is not canceled if the interrupt is disabled, or if interrupts other than NMI are masked by the
CPU.
When the RES pin is driven low, operation shifts to the reset state. After the stipulated reset input
duration, driving the RES pin high makes the CPU start reset exception handling.
When the STBY pin is driven low, a transition is made to hardware standby mode.
Bus master clock
Internal address bus
φ,
Internal write signal
peripheral module clock
Sleep Mode
Figure 21.2 Medium-Speed Mode Transition and Clearance Timing
SBYCR
Medium-speed mode
Rev. 2.00 Dec. 05, 2005 Page 581 of 724
Section 21 Power-Down Modes
SBYCR
REJ09B0200-0200