Low-Power Consumption Mode - Fujitsu MB90895 Series Hardware Manual

CHAPTER 3 CPU
3.8

Low-power Consumption Mode

The CPU operation modes are classified as follows according to the selection of the
operation clock and the oscillation control of a clock. All the operation modes except
the PLL clock mode are low-power consumption modes.
• Clock modes (main clock, PLL clock and sub clock modes)
• CPU intermittent operation modes (main clock, PLL clock, and sub clock modes)
• Standby modes (sleep, stop, watch, and timebase timer modes)
I CPU Operation Modes and Current Consumption
Figure 3.8-1 shows the relationships between the CPU operation mode and current consumption.
Figure 3.8-1 CPU Operation Modes and Current Consumption CPU
Consumption current
High
Low
This figure shows the image of operating mode and has some difference from actual consumption current.
124
PLL clock mode
CPU
operating mode
Main clock mode (2
Main clock intermittent operating mode
Subclock mode (SCLK)
Subclock intermittent operating mode
Standby mode
Low power consumption mode
PLL clockintermittent
operating mode
1
/HCLK)
Sleep mode
Watch mode
Time base timer mode
Stop mode
4 multiplier clock
3 multiplier clock
2 multiplier clock
1 multiplier clock
4 multiplier clock
3 multiplier clock
2 multiplier clock
1 multiplier clock