MC9S08QD4 Datasheet, PDF (189/202 Pages) Freescale Semiconductor, Inc – Microcontrollers

t_IHIL
IRQ/KBIPx
Appendix A Electrical Characteristics
IRQ/KBIPx
t_ILIH
Figure A-13. IRQ/KBIPx Timing
A.8.2 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.
Table A-9. TPM/MTIM Input Timing
Function
External clock frequency
External clock period
External clock high time
External clock low time
Input capture pulse width
Symbol
Min
f_TCLK
dc
t_TCLK
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_Text
TCLK
t_clkl
Figure A-14. Timer External Clock
TPMCHn
t_ICPW
TPMCHn
t_ICPW
Figure A-15. Timer Input Capture Pulse
MC9S08QD4 Series MCU Data Sheet, Rev. 3
Freescale Semiconductor
189