HD6473847RHV Datasheet, PDF (150/546 Pages) Renesas Technology Corp – Renesas 8-Bit Single-Chip Microcomputer H8 Family / H8/300L Super Low Power Series

Section 5 Power-Down Modes
5.2 Mode Transitions and States of LSI
Figure 5.1 shows the possible transitions among these operating modes. A transition is made from
the program execution state to the program halt state of the program by executing a SLEEP in-
struction. Interrupts allow for returning from the program halt state to the program execution state
of the program. A direct transition between active mode and subactive mode, which are both pro-
gram execution states, can be made without halting the program. The operating frequency can also
be changed in the same modes by making a transition directly from active mode to active mode,
and from subactive mode to subactive mode. RES input enables transitions from a mode to the
reset state. Table 5.2 shows the transition conditions of each mode after the SLEEP instruction is
executed and a mode to return by an interrupt. Table 5.3 shows the internal states of the LSI in
each mode.
Rev. 7.00 Mar. 08, 2010 Page 118 of 510
REJ09B0024-0700