r5f21368sdfp Renesas Electronics Corporation., r5f21368sdfp Datasheet - Page 134

• Manufacturer Part Number: r5f21368sdfp
• Description: Renesas Mcu R8c Family / R8c/3xt-a Series
• Manufacturer: Renesas Electronics Corporation.

Under development
R8C/36T-A Group
R01UH0240EJ0001 Rev.0.01
Apr 28, 2011
10. Power Control
Power control refers to the control of power consumption by selecting or stopping the CPU clock and the peripheral
function clocks.
10.1
Figure 10.1
There are three power control modes. All modes other than wait mode and stop mode will be referred to here as
standard operating mode.
Figure 10.1 shows the State Transitions in Power Control Mode.
CM03 to CM05: Bits in CM0 register
CM10, CM13, CM14: Bits in CM1 register
CM40 to CM42: Bits in CM4 register
FRA00: Bit in FRA0 register
Standard operating mode
Overview
Preliminary document
Specifications in this document are tentative and subject to change.
State Transitions in Power Control Mode
Modes available for transition to
wait mode or stop mode
CM42 to CM40 = 000b
High-speed clock
CPU operation is stopped
Interrupt
CM05 = 0
CM13 = 1
mode
Wait mode
WAIT instruction
CM42 to CM40 = 001b
CM42 to CM40 = 101b
High-speed on-chip
Low-speed on-chip
oscillator mode
oscillator mode
FRA00 = 1
CM14 = 0
Reset
All oscillations are stopped
Interrupt
(except fLOCOWDT)
Stop mode
CM42 to CM40 = 011b
Low-speed clock
CM04 = 1
CM03 = 0
CM10 = 1
mode
10. Power Control
Page 103 of 725