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Chapter 6
Power Management
6.1 Introduction
The operating modes of the device are described in this chapter. Entry into each mode,
exit from each mode, and functionality while in each of the modes are described.
6.2 Features
These MCUs feature the following power modes:
• Run mode
• Wait mode
• CPU shuts down to conserve power
• Bus clocks are running
• Full voltage regulation is maintained
• Stop modes
• System clocks stopped; PMC is powered with voltage regulator in standby
• all internal circuits powered for fast recovery
6.2.1 Run mode
This is the normal operating mode. In this mode, the CPU executes code from internal
memory with execution beginning at the address fetched from memory at 0xFFFE:
0xFFFF after reset. The power supply is fully regulating and all peripherals can be active
in run mode.
NXP Semiconductors
MC9S08SU16 Reference Manual, Rev. 5, 4/2017
71
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