mc9s08gt32a Freescale Semiconductor, Inc, mc9s08gt32a Datasheet - Page 120

• Manufacturer Part Number: mc9s08gt32a
• Description: Hcs08 Microcontrollers 8-bit Microcontroller Family
• Manufacturer: Freescale Semiconductor, Inc

Internal Clock Generator (S08ICGV2)
RECOVERY
RECOVERY FROM
FROM STOP3
RESET, STOP1, STOP2
INITIALIZE ICG
ICG1 = $28
CHECK
NO
ICG2 = $31
FLL LOCK STATUS.
LOCK = 1?
YES
CHECK
NO
FLL LOCK STATUS.
LOCK = 1?
CONTINUE
YES
CONTINUE
NOTE: THIS WILL REQUIRE THE INTERAL REFERENCE CLOCK TO START AND
STABILIZE.
Figure 7-10. ICG Initialization and Stop Recovery for Example #3
7.4.5
Example #4: Internal Clock Generator Trim
The internally generated clock source is guaranteed to have a period ± 25% of the nominal value. In some
case this may be sufficient accuracy. For other applications that require a tight frequency tolerance, a
trimming procedure is provided that will allow a very accurate source. This section outlines one example
of trimming the internal oscillator. Many other possible trimming procedures are valid and can be used.
MC9S08GB60A Data Sheet, Rev. 1.02
120
Freescale Semiconductor