mc9s08qd4 Freescale Semiconductor, Inc, mc9s08qd4 Datasheet - Page 189

• Manufacturer Part Number: mc9s08qd4
• Description: Hcs08 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

A.8.2
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.
Freescale Semiconductor
Timer/PWM (TPM) Module Timing
External clock frequency
External clock period
External clock high time
External clock low time
Input capture pulse width
Function
TCLK
TPMCHn
TPMCHn
IRQ/KBIPx
IRQ/KBIPx
MC9S08QD4 Series MCU Data Sheet, Rev. 3
Figure A-15. Timer Input Capture Pulse
Table A-9. TPM/MTIM Input Timing
Figure A-14. Timer External Clock
Figure A-13. IRQ/KBIPx Timing
t
clkh
Symbol
t
t
ICPW
ICPW
f
t
t
ICPW
TCLK
TCLK
t
t
clkh
clkl
t
t
IHIL
ILIH
t
Text
t
clkl
Min
1.5
1.5
1.5
dc
4
Appendix A Electrical Characteristics
f
Max
Bus
—
—
—
—
/4
MHz
Unit
t
t
t
t
cyc
cyc
cyc
cyc
189