MC9S08GB32 Motorola, MC9S08GB32 Datasheet - Page 116

• Manufacturer Part Number: MC9S08GB32
• Description: Microcontrollers
• Manufacturer: Motorola

Internal Clock Generator (ICG) Module
RECOVERY
RECOVERY FROM
FROM STOP3
RESET, STOP1, OR 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.
MC9S08GB/GT Data Sheet, Rev. 2.3
116
Freescale Semiconductor