Datasheet

Electrical Characteristics
MC9S08MP16 Series Data Sheet, Rev. 2
Freescale Semiconductor 29
Figure 19. FTM External Clock
Figure 20. FTM Input Capture Pulse
2.14.3 MTIM Module Timing
Synchronizer circuits determine the fastest clock that can be used as the optional external clock source to the MTIM timer
counter. These synchronizers operate from the current bus rate clock.
Figure 21. MTIM Timer External Clock
4 D External clock low time t
clkl
0.75 — t
cyc
5 D Input capture pulse width t
ICPW
0.75 — t
cyc
1
The maximum external clock frequency is limited to 10MHz due to input filter characteristics.
Table 18. MTIM Input Timing
No. C Function Symbol Min Max Unit
1 D External clock frequency f
TCLK
0f
Bus
/4 Hz
2 D External clock period t
TCLK
4—t
cyc
3 D External clock high time t
clkh
1.5 — t
cyc
4 D External clock low time t
clkl
1.5 — t
cyc
Table 17. FTM Input Timing (continued)
No. C Function Symbol Min Max Unit
t
TCLK
t
clkh
t
clkl
TCLK
t
ICPW
FTMxCHn
t
ICPW
FTMxCHn
t
TCLK
t
clkh
t
clkl
TCLK