HD6432633 Datasheet, PDF (215/1453 Pages) Renesas Technology Corp – Series of Microcomputers (MCUs: microcomputer units)

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)).
SLEEP instruction
execution
PC break exception
handling
Execution of instruction
after sleep instruction
(A)
SLEEP instruction
execution
SLEEP instruction
execution
SLEEP instruction
execution
System clock
→ subclock
Direct transition
exception handling
PC break exception
handling
Subclock →
system clock,
oscillation settling time
Direct transition
exception handling
Transition to
respective mode
(D)
Subactive
mode
PC break exception
handling
High-speed
(medium-speed)
mode
Execution of instruction
after sleep instruction
(B)
Execution of instruction
after sleep instruction
(C)
Figure 6-2 Operation in Power-Down Mode Transitions
6.3.5 PC Break Operation in Continuous Data Transfer
If a PC break interrupt is generated when the following operations are being performed, exception
handling is executed on completion of the specified transfer.
(1) When a PC break interrupt is generated at the transfer address of an EEPMOV.B instruction:
PC break exception handling is executed after all data transfers have been completed and the
EEPMOV.B instruction has ended.
(2) When a PC break interrupt is generated at a DTC transfer address:
PC break exception handling is executed after the DTC has completed the specified number of
data transfers, or after data for which the DISEL bit is set to 1 has been transferred.
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