MC9S08SG8 Datasheet, PDF (292/310 Pages) Freescale Semiconductor, Inc – Microcontrollers

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-13. TPM Input Timing
Num
1
2
3
4
5
C
Rating
T External clock frequency
T External clock period
T External clock high time
T External clock low time
P 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
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
MC9S08SG8 MCU Series Data Sheet, Rev. 0
292
PRELIMINARY
Freescale Semiconductor