Chapter 5 Clocks and Reset Generator (S12CRGV6)
MC9S12XDP512 Data Sheet, Rev. 2.11
Freescale Semiconductor 297
Figure 5-21. Wait Mode Entry/Exit Sequence
Enter
Wait Mode
PLLWAI=1
?
Exit Wait w.
CMRESET
Exit Wait w.
ext.RESET
Exit
Wait Mode
Enter
SCM
Exit
Wait Mode
CPU Req’s
Wait Mode.
Clear PLLSEL,
Disable PLL
CME=1
?
INT
?
CM Fail
?
SCME=1
?
SCMIE=1
?
Continue w.
Normal OP
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
Yes
Wait Mode left
due to external reset
Generate
SCM Interrupt
(Wakeup from Wait) SCM=1
?
Enter
SCM
No
Yes