HD64F2638F20J Datasheet, PDF (195/1512 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

H8S/2639, H8S/2638, H8S/2636,
H8S/2630, H8S/2635 Group
Section 6 PC Break Controller (PBC)
6.3.4 Operation in Transitions to Power-Down Modes
The operation when a PC break interrupt is set for an instruction fetch at the address after a
SLEEP instruction is shown below.
(1) When the SLEEP instruction causes a transition from high-speed (medium-speed) mode to
sleep mode, or from subactive mode* to subsleep mode*:
After execution of the SLEEP instruction, a transition is not made to sleep mode or subsleep
mode*, and PC break interrupt handling is executed. After execution of PC break interrupt
handling, the instruction at the address after the SLEEP instruction is executed (figure 6-2
(A)).
(2) When the SLEEP instruction causes a transition from high-speed (medium-speed) mode to
subactive mode*:
After execution of the SLEEP instruction, a transition is made to subactive mode* via direct
transition exception handling. After the transition, PC break interrupt handling is executed,
then the instruction at the address after the SLEEP instruction is executed (figure 6-2 (B)).
(3) When the SLEEP instruction causes a transition from subactive mode* to high-speed
(medium-speed) mode:
After execution of the SLEEP instruction, and following the clock oscillation settling time, a
transition is made to high-speed (medium-speed) mode via direct transition exception
handling. After the transition, PC break interrupt handling is executed, then the instruction at
the address after the SLEEP instruction is executed (figure 6-2 (C)).
(4) When the SLEEP instruction causes a transition to software standby mode or watch mode*:
After execution of the SLEEP instruction, a transition is made to the respective mode, and PC
break interrupt handling is not executed. However, the CMFA or CMFB flag is set (figure 6-2
(D)).
Note: * Subclock functions (subactive mode, subsleep mode, and watch mode) are available in the
U-mask and W-mask versions only.
REJ09B0103-0800 Rev. 8.00
May 28, 2010
Page 145 of 1458