r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 1139

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

24.2.2
(1)
When the SLEEP instruction is executed while the SSBY bit is 0 in SBYCR, 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 functions do not stop.
(2)
Sleep mode is exited by any interrupt, or signals at the RES, or STBY pins.
• Exiting Sleep Mode by Interrupts:
• Exiting Sleep Mode by RES Pin:
• Exiting Sleep Mode by STBY Pin:
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.
Setting the RES pin level low selects the reset state. After the stipulated reset input duration,
driving the RES pin high starts the CPU performing reset exception processing.
When the STBY pin level is driven low, a transition is made to hardware standby mode.
Transition to Sleep Mode
Exiting Sleep Mode
Sleep Mode
Rev. 1.00 Sep. 19, 2008 Page 1111 of 1270
Section 24 Power-Down Modes
REJ09B0466-0100