Overview Of Low-Power Consumption Mode; Fig. 5.1 Cpu Operating Mode And Current Consumption - Fujitsu MB90420/5 (A) Series Hardware Manual

This chapter explains the low-power consumption mode.

5.1 Overview of Low-power Consumption Mode

The following CPU operation modes are provided by the selection of the operating clock and control of the
clock operation.
• Clock modes (PLL clock, main clock, and sub-clock modes)
• CPU Intermittent operation modes (PLL clock, main clock, and sub-clock intermittent operation modes)
• Standby modes (sleep, time-base timer, timer, and stop modes)
n CPU Operation modes and current consumption
Figure 5.1 shows the relationships between the CPU operation mode and current consumption.
Current consumption
10n mA
n mA
n µA
Note: This figure shows an image of each mode that is partially different from the actual current consumption.
LOW-POWER CONSUMPTION MODE
CPU Operation
PLL Clock mode
mode
Low-power consumption mode

Fig. 5.1 CPU Operating Mode and Current Consumption

PLL Clock intermittent
operation mode
Main clock mode (1/2 clock mode)
Main clock intermittent operation mode
Sub-clock mode (1/2 clock mode)
Sub-clock intermittent operation mode
Standby mode
5-3
4-multiplied clock
3-multiplied clock
2-multiplied clock
1-multiplied clock
4-multiplied clock
3-multiplied clock
2-multiplied clock
1-multiplied clock
Sleep mode
Time-base timer mode
Clock mode
Stop mode