MC9S08AC60CFGE Datasheet, PDF (272/350 Pages) Freescale Semiconductor, Inc – 40-MHz HCS08 CPU (central processor unit)

Timer/PWM Module (S08TPMV3)
15.6.1.1 Counter Clock Source
The 2-bit field, CLKSB:CLKSA, in the timer status and control register (TPMxSC) selects one of three
possible clock sources or OFF (which effectively disables the TPM). See Table 15-5. After any MCU reset,
CLKSB:CLKSA=0:0 so no clock source is selected, and the TPM is in a very low power state. These
control bits may be read or written at any time and disabling the timer (writing 00 to the CLKSB:CLKSA
field) does not affect the values in the counter or other timer registers.
MC9S08AC60 Series Data Sheet, Rev. 3
272
Freescale Semiconductor