Datasheet

Section 22 Power-Down Modes
Rev. 3.00 Sep. 28, 2009 Page 631 of 710
REJ09B0384-0300
Section 22 Power-Down Modes
For operating modes after the reset state is cancelled, this LSI has not only the normal program
execution state but also seven power-down modes in which power consumption is significantly
reduced. In addition, there is also module stop mode in which reduced power consumption can be
achieved by individually stopping on-chip peripheral modules.
• Medium-speed mode
System clock frequency for the CPU operation can be selected as φ/2, φ/4, φ/8, φ/16,or φ/32.
• Sleep mode
The CPU stops but on-chip peripheral modules continue operating.
• Software standby mode
Clock oscillation stops, and the CPU and on-chip peripheral modules stop operating.
• Hardware standby mode
Clock oscillation stops, and the CPU and on-chip peripheral modules enter reset state.
• Module stop mode
Independently of above operating modes, on-chip peripheral modules that are not used can be
stopped individually.