h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 782

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 22 Power-Down Modes
22.4
22.4.1
When the SLEEP instruction is executed when the SBYCR SSBY bit = 0 and the LPWRCR
LSON bit = 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 supporting modules do not stop.
22.4.2
Sleep mode is exited by any interrupt, or signals at the RES, or STBY pins.
Exiting Sleep Mode by Interrupts: 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.
Exiting Sleep Mode by RES
stipulated reset input duration, driving the RES pin High starts the CPU performing reset
exception processing.
Exiting Sleep Mode by STBY
to hardware standby mode.
Rev. 5.00 Sep 22, 2005 page 756 of 1136
REJ09B0257-0500
supporting module clock
Internal address bus
Bus master clock
Internal write signal
,
Sleep Mode
Sleep Mode
Exiting Sleep Mode
Figure 22.2 Medium-Speed Mode Transition and Clearance Timing
RES pin: Setting the RES pin level Low selects the reset state. After the
RES
RES
STBY Pin: When the STBY pin level is driven Low, a transition is made
STBY
STBY
SBYCR
Medium-speed mode
SBYCR