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
.
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