MC9S08QE128_08 Datasheet, PDF (26/50 Pages) Freescale Semiconductor, Inc – 8-Bit HCS08 Central Processor Unit (CPU)

Electrical Characteristics
3.10.2 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 14. TPM Input Timing
No. C
Function
1
D External clock frequency
2
D External clock period
3
D External clock high time
4
D External clock low time
5
D Input capture pulse width
Symbol
Min
f_TCLK
0
t_TCLK
4
t_clkh
1.5
t_clkl
1.5
t_ICPW
1.5
Max
f_Bus/4
—
—
—
—
Unit
Hz
t_cyc
t_cyc
t_cyc
t_cyc
t_clkh
t_TCLK
TCLK
t_clkl
Figure 19. Timer External Clock
TPMCHn
t_ICPW
TPMCHn
t_ICPW
Figure 20. Timer Input Capture Pulse
MC9S08QE128 Series Data Sheet, Rev. 7
26
Freescale Semiconductor