Datasheet

Table Of Contents
Rev. 2.00 Jul. 04, 2007 Page 672 of 692
REJ09B0309-0200
Item Page Revisions (See Manual for Details)
6.2.6 Active (Medium-Speed)
Mode
118 The description in this section is modified.
6.3 Direct Transition 119 The description in this section is modified.
6.3.1 Direct Transition from
Active (High-Speed) Mode to
Active (Medium-Speed) Mode
119 Added
When a SLEEP instruction is executed in active (high-speed)
mode while the SSBY and LSON bits in SYSCR1 are cleared to
0 and the MSON and DTON bits in SYSCR2 are set to 1, a
transition is made to active (medium-speed) mode via sleep
mode.
The time from the start of SLEEP instruction execution to the end
of interrupt exception handling (the direct transition time) is
calculated by equation (1).
:
Example: When φosc/8 is selected as the CPU operating clock
after the transition
Direct transition time = (2 + 1) × 1tosc + 14 × 8tosc = 115tosc
For the legend of symbols used above, refer to section 26,
Electrical Characteristics.
6.3.2 Direct Transition from
Active (High-Speed) Mode to
Subactive Mode
120 Added
When a SLEEP instruction is executed in active (high-speed)
mode while the SSBY, TMA3, and LSON bits in SYSCR1 are set
to 1 and the DTON bit in SYSCR2 is set to 1, a transition is made
to subactive mode via watch mode.
The time from the start of SLEEP instruction execution to the end
of interrupt exception handling (the direct transition time) is
calculated by equation (2).
:
Example: When φw/8 is selected as the subactive operating
clock after the transition
Direct transition time = (2 + 1) × 1tosc + 14 × 8tw = 3tosc +
112tw
For the legend of symbols used above, refer to section 26,
Electrical Characteristics.