MC9S08DZ128 Datasheet, PDF (440/458 Pages) Freescale Semiconductor, Inc – Microcontrollers

Appendix A Electrical Characteristics
A.12.2 Timer/PWM
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.
Table A-14. TPM Input Timing
Num
1
2
3
4
5
C
Rating
— External clock frequency
— External clock period
D External clock high time
D External clock low time
D Input capture pulse width
Symbol
Min
f_TPMext
dc
t_TPMext
4
t_clkh
1.5
t_clkl
1.5
t_ICPW
1.5
Max
f_Bus/4
—
—
—
—
Unit
MHz
t_cyc
t_cyc
t_cyc
t_cyc
TPMxCHn
t_clkh
t_Text
t_clkl
Figure A-13. Timer External Clock
TPMxCHn
t_ICPW
TPMxCHn
t_ICPW
Figure A-14. Timer Input Capture Pulse
MC9S08DZ128 Series Data Sheet, Rev. 1
440
Freescale Semiconductor