Overview Of Low-Power Consumption Mode - Fujitsu F2MCTM-16LX Hardware Manual

CHAPTER 8 LOW-POWER CONSUMPTION MODE
8.1

Overview of Low-Power Consumption Mode

The MB90360 series has the following CPU operating modes, any of which can be used
depending on operating clock selection and clock oscillation control:
• Clock mode
• CPU intermittent operating mode : main clock intermittent operating mode, PLL clock
• Standby mode
CPU Operating Modes and Current Consumption
Figure 8.1-1 shows the relationship between the CPU operating modes and current consumption.
Current consumption
Several tens of 10mA
Several mA
Several A
134
: main clock mode, PLL clock mode, or sub-clock mode
intermittent operating mode, or sub-clock intermittent
operating mode
: sleep mode, stop mode, watch mode, or timebase
timer mode
Figure 8.1-1 CPU Operating Mode and Current Consumption
CPU
operation mode
Low-power consumption mode
This figure shows the imageof operating mode and has some difference from actual current consumpation.
PLL clock mode
PLL clock intermittent
opreting mode
Main clock mode (1/2HCLK)
Main clock intermittent operating mode
Subclock mode (1/4 or 1/2 of oscillation frequency)
Subclock intermittent operating mode
Standby mode Sleep mode
Timebase timer mode
Watch mode
Stop mode
6 multiplier clock
4 multiplier clock
3 multiplier clock
2 multiplier clock
1 multiplier clock
6 multiplier clock
4 multiplier clock
3 multiplier clock
2 multiplier clock
1 multiplier clock