MC9S08DZ128 Datasheet, PDF (190/458 Pages) Freescale Semiconductor, Inc – Microcontrollers

Chapter 8 Multi-Purpose Clock Generator (S08MCGV2)
START
IN FEI MODE
MCGC2 = $36
CHECK
NO
OSCINIT = 1 ?
YES
MCGC3 = $11
(DIV32 = 1)
MCGC1 = $98
CHECK
NO
IREFST = 0?
YES
CHECK
NO
CLKST = %10?
YES
ENTER
NO
BLPE MODE ?
YES
MCGC2 = $3E
(LP = 1)
MCGC3 = $58
IN
BLPE MODE ? ^NO
(LP=1)
YES
MCGC2 = $36
(LP = 0)
CHECK
NO
PLLST = 1?
YES
CHECK
NO
LOCK = 1?
YES
MCGC1 = $18
CHECK
NO
CLKST = %11?
YES
CONTINUE
IN PEE MODE
Figure 8-10. Flowchart of FEI to PEE Mode Transition using an 8 MHz crystal
MC9S08DZ128 Series Data Sheet, Rev. 1
190
Freescale Semiconductor