Datasheet

Section 6 Power-Down Modes
REJ09B0465-0300 Rev. 3.00 Page 147 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
6.2 Mode Transitions and States of LSI
Figure 6.1 shows the possible transitions among the operating modes. SLEEP instructions are used
to cause a transition from the program execution state to the program halt state. Interrupts are used
to return from the program halt state to the program execution state. When the RES pin is driven
low or any other internal reset occurs, this LSI is placed in the reset state from any mode. After
release from a reset, this LSI is placed in active mode.
Reset state
Operating clock: φloco
Program stop state
Peripheral functions
unavailable
Program execution
state
Program halt state
Peripheral functions
available
Standby mode Active mode Sleep mode
Selectable clock sources:
φosc
φloco
φsub
SSBY = 1
SLEEP instruction
Interrupt
SSBY = 0
SLEEP instruction
Interrupt
Figure 6.1 Mode Transition Diagram