MC9S08SH32CWL Datasheet, PDF (308/328 Pages) Freescale Semiconductor, Inc – MC9S08SH32 Series Features

Appendix A Electrical Characteristics
A.12.2 TPM/MTIM 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.
Table A-14. TPM Input Timing
Num C
Rating
Symbol
Min
1
— External clock frequency (1/t_TCLK)
f_TCLK
dc
2
— External clock period
t_TCLK
4
3
— External clock high time
t_clkh
1.5
4
— External clock low time
t_clkl
1.5
5
— Input capture pulse width
t_ICPW
1.5
Max
f_Bus/4
—
—
—
—
Unit
MHz
t_cyc
t_cyc
t_cyc
t_cyc
t_clkh
t_TCLK
TCLK
t_clkl
Figure A-12. Timer External Clock
TPMCHn
t_ICPW
TPMCHn
t_ICPW
Figure A-13. Timer Input Capture Pulse
MC9S08SH32 Series Data Sheet, Rev. 2
308
Freescale Semiconductor
PRELIMINARY