MC9S08DN60_08 Datasheet, PDF (157/356 Pages) Freescale Semiconductor, Inc – Microcontrollers

START
IN FEI MODE
MCGC2 = $36
CHECK
NO
OSCINIT = 1 ?
YES
MCGC1 = $B8
Chapter 8 Multi-Purpose Clock Generator (S08MCGV1)
CHECK
NO
PLLST = 1?
YES
MCGC2 = $36
(LP = 0)
CHECK
NO
IREFST = 0?
YES
CHECK
NO
CLKST = %10?
YES
MCGC2 = $3E
(LP = 1)
MCGC1 = $98
MCGC3 = $44
CHECK
NO
LOCK = 1?
YES
MCGC1 = $18
CHECK
NO
CLKST = %11?
YES
CONTINUE
IN PEE MODE
Figure 8-12. Flowchart of FEI to PEE Mode Transition using a 8 MHz crystal
MC9S08DN60 Series Data Sheet, Rev 3
Freescale Semiconductor
157