mc9s08gt16a Freescale Semiconductor, Inc, mc9s08gt16a Datasheet - Page 146

• Manufacturer Part Number: mc9s08gt16a
• Description: Hcs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Internal Clock Generator (S08ICGV4)
ICGTRM = $xx
Figure 9-14
146
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 9-14. ICG Initialization for FEE in Example #1
MC9S08GT16A/GT8A Data Sheet, Rev. 1
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
RECOVERY FROM STOP
FLL LOCK STATUS.
OSCSTEN = 0
CONTINUE
LOCK = 1?
CHECK
YES
Freescale Semiconductor
NO