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Chapter 10 Power Control Unit (MC_PCU)
MPC5606BK Microcontroller Reference Manual, Rev. 2
204
Freescale Semiconductor
Figure 10-8. MC_PCU Events During Power Sequences (non-STANDBY mode)
When the MC_PCU receives a mode change request to RUN0, it starts its power-up phase if
PCU_PCONF2.RUN0 is 1. The power domain is reconnected to the power supply, and the voltage in
power domain #2 will increase slowly. Once the voltage of power domain #2 is within an operable range,
its clocks are enabled, and its resets are deasserted (power-up state).
NOTE
It is possible that, due to a mode change, power-up is requested before a
power domain completed its power-down sequence. In this case, the
information in that power domain is lost.
10.4.4.2
STANDBY mode transition
STANDBY offers the maximum power saving. The level of power saving is software-controllable via the
settings in the PCU_PCONFn registers for power domain #2 onwards. Power domain #0 stays connected
to the power supply while power domain #1 is disconnected from the power supply. Among others, power
domain #1 contains the platform and the MC_ME. Therefore this mode differs from all other user/system
modes.
Once STANDBY is entered it can only be left via a system wakeup. On exiting the STANDBY mode, all
power domains are powered up according to the settings in the PCU_PCONFn registers, and the DRUN
mode is entered. In DRUN mode, at least power domains #0 and #1 are powered.
shows an example for a mode transition from RUN0 to STANDBY to DRUN. All power
domains that have PCU_PCONFn.STBY0 cleared will enter power-down phase. In this example only
power domain #1 will be disabled during STANDBY mode.
When the MC_PCU receives the mode change request to STANDBY mode it starts the power down phase
for power domain #1. During the power down phase, clocks are disabled and reset is asserted resulting in
a loss of all information for this power domain. Then the power domain is disconnected from the power
supply (power-down state).
new mode
power-down
RUN0
voltage in
PSTAT.PD2
HALT
RUN0
Notes:
Not drawn to scale; PCONF2.RUN0 = 1; PCONF2.HALT = 0
current mode
power-up phase
power domain #2
RUN0
HALT
RUN0
requested by ME
power-down state
power-up state
power-up state
phase
Summary of Contents for MPC5605BK
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Page 20: ...MPC5606BK Microcontroller Reference Manual Rev 2 20 Freescale Semiconductor...
Page 103: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 103 Clocks and power...
Page 645: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 643 Timers...
Page 715: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 713 ADC system...
Page 787: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 787 Memory...
Page 893: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 893 Integrity...
Page 943: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 943 Debug...