MC9S08MM128 Datasheet, PDF (37/50 Pages) Freescale Semiconductor, Inc – Advanced Information

Preliminary Electrical Characteristics
2.11.2 TPM 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 20. TPM Input Timing
#
C
Function
1
— External clock frequency
2
— External clock period
3
D External clock high time
4
D External clock low time
5
D Input capture pulse width
Symbol
f_TPMext
t_TPMext
t_clkh
t_clkl
t_ICPW
Min
Max Unit
dc
f_Bus/4 MHz
4
—
t_cyc
1.5
—
t_cyc
1.5
—
t_cyc
1.5
—
t_cyc
t_clkh
t_TPMext
TPMxCLK
t_clkl
Figure 10. Timer External Clock
TPMxCHn
t_ICPW
TPMxCHn
t_ICPW
Figure 11. Timer Input Capture Pulse
Freescale Semiconductor
37
Non-Disclosure Agreement Required
Preliminary — Subject to Change