Overview Of Low-Power Consumption Mode - Fujitsu F2MC-16LX Hardware Manual

CHAPTER 6 LOW-POWER CONSUMPTION MODE
6.1

Overview of Low-Power Consumption Mode

The following CPU operation modes are available on the MB90470-series devices by
selecting a suitable operation clock and by controlling clock operation.
• Clock modes (PLL clock mode, main clock mode, and sub-clock mode)
• CPU intermittent operation modes (PLL clock intermittent operation mode, main
clock intermittent operation mode, and sub-clock intermittent operation mode)
• Standby modes (sleep mode, timebase timer mode, stop mode, and watch mode)
I CPU operation mode and current consumption
Figure 6.1-1 "CPU operation mode and current consumption" illustrates the relationship
between CPU operation mode and current consumption.
Figure 6.1-1 CPU operation mode and current consumption
Current consumption
Several dozen mA
Several mA
Several mA
Note: This diagram is just an example, so its values may differ from actual current consumption.
128
CPU
PLL clock mode
operation
mode
PLL clock intermittent
operation mode
Main clock mode (1/2 clock mode)
Main clock intermittent operation mode
Standby mode
Low-power consumption mode
Clock multiplied by four
Clock multiplied by three
Clock multiplied by two
Clock multiplied by one
Clock multiplied by four
Clock multiplied by three
Clock multiplied by two
Clock multiplied by one
Sub clock mode
Sub clock intermittent operation mode
Sleep mode
Timebase timer mode
Watch mode
Stop mode