Datasheet

Appendix A Electrical Characteristics and Timing Specifications
MC9S08AW60 Data Sheet, Rev 2
302 Freescale Semiconductor
A.10.2 Timer/PWM (TPM) Module Timing
Synchronizer circuits determine the shortest input pulses that can be recognized or the fastest clock that
can be used as the optional external source to the timer counter. These synchronizers operate from the
current bus rate clock.
Figure A-14. Timer External Clock
Figure A-15. Timer Input Capture Pulse
Table A-14. TPM Input Timing
Function Symbol Min Max Unit
External clock frequency
f
TPMext
dc
f
Bus
/4
Hz
External clock period
t
TPMext
4—
t
cyc
External clock high time
t
clkh
1.5 —
t
cyc
External clock low time
t
clkl
1.5 —
t
cyc
Input capture pulse width
t
ICPW
1.5 —
t
cyc
t
TPMext
t
clkh
t
clkl
TPMxCLK
t
ICPW
TPMxCHn
t
ICPW
TPMxCHn