Datasheet

Table Of Contents
Rev. 2.00 Jul. 04, 2007 Page 675 of 692
REJ09B0309-0200
Item Page Revisions (See Manual for Details)
6.3.6 Direct Transition from
Subactive Mode to Active
(Medium-Speed) Mode
122 Added
When a SLEEP instruction is executed in subactive mode while
the SSBY and TMA3 bits in SYSCR1 are set to 1, the LSON bit
in SYSCR1 is cleared to 0, and the MSON and DTON bits in
SYSCR2 are set to 1, a transition is made directly to active
(medium-speed) mode via watch mode after the waiting time set
in bits STS2 to STS0 in SYSCR1 has elapsed.
The time from the start of SLEEP instruction execution to the end
of interrupt exception handling (the direct transition time) is
calculated by equation (6).
:
Example: When φw/8 and φosc/8 are selected as the CPU
operating clock before and after the transition, respectively,
and wait time = 8192 states
Direct transition time = (2 + 1) × 8tw + 8192 × 1tosc + 14 ×
8tosc = 24tw + 8304tosc
For the legend of symbols used above, refer to section 26,
Electrical Characteristics.
Section 7 ROM
Figure 7.4 Flow of RAM
Emulation
Figure 7.4 and the description on the figure are deleted.
7.9 Notes on Setting Module
Standby Mode
147 Modified
Then the flash memory should be set to enter the module
standby mode.
When the RAM emulation is not in use, if an interrupt is
generated in module standby mode, the vector address cannot
be fetched. As a result, the program may run away.
:
When the RAM emulation is used (an interrupt vector is
provided), if an interrupt is generated in module standby mode,
the vector address can be set by assigning the interrupt vector to
the RAM, and this prevents the program to run away. For details,
see section 7.4, Using RAM to Emulate Flash Memory.