Datasheet

Internal Clock Generator (S08ICGV4)
MC9S08AC16 Series Data Sheet, Rev. 9
Freescale Semiconductor 151
ICGTRM = $xx
Bit 7:0 TRIM Only need to write when trimming internal oscillator; done in separate
operation (see example #4)
Figure 8-16. ICG Initialization and Stop Recovery for Example #3
RESET
CONTINUE
CHECK
LOCK = 1?
NO
YES
FLL LOCK STATUS.
INITIALIZE ICG
ICGC1 = $28
ICGC2 = $31
RECOVERY
CONTINUE
CHECK
LOCK = 1?
NO
YES
FLL LOCK STATUS.
NOTE: THIS WILL REQUIRE THE INTERAL REFERENCE CLOCK TO START AND
STABILIZE.
FROM STOP