Chapter 5 Clocks and Reset Generator (S12CRGV6)
MC9S12XDP512 Data Sheet, Rev. 2.11
304 Freescale Semiconductor
Figure 5-23. Fast Wake-up from Full Stop Mode: Example 1
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Figure 5-24. Fast Wake-up from Full Stop Mode: Example 2
Oscillator Clock
PLL Clock
Core Clock
Instruction
STOP IRQ Service
FSTWKP=1
Interrupt
IRQ Service
Interrupt Interrupt
STOP STOP IRQ Service
Oscillator Disabled
Power Saving
Self-Clock Mode
SCME=1
CPU resumes program execution immediately
Oscillator Clock
PLL Clock
Core Clock
Instruction
Clock Quality Check
STOP IRQ Service
FSTWKP=1
IRQ Interrupt
FSTWKP=0 SCMIE=1 Freq. Uncritical
Instructions Freq. Critical
Instr. Possible
OSC StartupOscillator Disabled
CPU resumes program execution immediately
SCM Interrupt
Self-Clock Mode
SCME=1