mc9s08ac16 Freescale Semiconductor, Inc, mc9s08ac16 Datasheet - Page 152

• Manufacturer Part Number: mc9s08ac16
• Description: Hcs08 Microcontrollers 8-bit Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 8 Internal Clock Generator (S08ICGV4)
ICGTRM = $xx
Figure 8-14
152
Bits 11:0 FLT
Bits 7:0
FLL LOCK STATUS.
shows flow charts for three conditions requiring ICG initialization.
INITIALIZE ICG
ICGC1 = $38
ICGC2 = $00
TRIM
CONTINUE
LOCK = 1?
RESET
CHECK
YES
No need for user initialization
Only need to write when trimming internal oscillator; not used when external
crystal is clock source
NO
Figure 8-14. ICG Initialization for FEE in Example #1
MC9S08AC16 Series Data Sheet, Rev. 0
QUICK RECOVERY FROM STOP
RECOVERY FROM STOP
FLL LOCK STATUS.
OSCSTEN = 1
CONTINUE
LOCK = 1?
CHECK
PRELIMINARY
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
RECOVERY FROM STOP
FLL LOCK STATUS.
OSCSTEN = 0
CONTINUE
LOCK = 1?
CHECK
YES
Freescale Semiconductor
NO