S912XHZ512F1VAG Datasheet, PDF (357/978 Pages) Freescale Semiconductor, Inc – Covers MC9S12XHZ384, MC9S12XHZ256

CPU Req’s
Wait Mode.
No
PLLWAI=1
?
Yes
Chapter 7 Clocks and Reset Generator (S12CRGV6)
Clear PLLSEL,
Disable PLL
Enter
Wait Mode
Wait Mode left
due to external reset
Exit Wait w.
ext.RESET
CME=1
No
?
Yes
CM Fail
No
?
Yes
Exit Wait w.
No
CMRESET
SCME=1
?
Yes
Generate
SCM Interrupt
(Wakeup from Wait)
SCMIE=1
No
?
Yes
Exit
Wait Mode
Enter
SCM
No
INT
?
Yes
Exit
Wait Mode
SCM=1
No
?
Yes
Enter
SCM
Continue w.
Normal OP
Figure 7-21. Wait Mode Entry/Exit Sequence
MC9S12XHZ512 Data Sheet, Rev. 1.06
Freescale Semiconductor
357