mc9s08ac32 Freescale Semiconductor, Inc, mc9s08ac32 Datasheet - Page 183

• Manufacturer Part Number: mc9s08ac32
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

ICGTRM = $xx
Figure 10-14
Freescale Semiconductor
Only needed in self-clocked mode; FLT will be adjusted by loop to give 8.38 MHz DCO clock
Bits 15:12 unused
Bits 11:0 FLT
Bits 7:0
FLL LOCK STATUS.
INITIALIZE ICG
shows flow charts for three conditions requiring ICG initialization.
ICGC1 = $38
ICGC2 = $00
TRIM
CONTINUE
LOCK = 1?
RESET
CHECK
YES
0000
No need for user initialization
Only need to write when trimming internal oscillator; not used when external
crystal is clock source
Figure 10-14. ICG Initialization for FEE in Example #1
NO
MC9S08AC60 Series Data Sheet, Rev. 2
QUICK RECOVERY FROM STOP
RECOVERY FROM STOP
FLL LOCK STATUS.
OSCSTEN = 1
CONTINUE
LOCK = 1?
CHECK
YES
NOTE: THIS WILL REQUIRE THE OSCILLATOR TO START AND
STABILIZE. ACTUAL TIME IS DEPENDENT ON CRYSTAL /RESONATOR
AND EXTERNAL CIRCUITRY.
NO
MINIMUM CURRENT DRAW IN STOP
Chapter 10 Internal Clock Generator (S08ICGV4)
RECOVERY FROM STOP
FLL LOCK STATUS.
OSCSTEN = 0
CONTINUE
LOCK = 1?
CHECK
YES
NO
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