mcf51qe128 Freescale Semiconductor, Inc, mcf51qe128 Datasheet - Page 23

• Manufacturer Part Number: mcf51qe128
• Description: Mcf51qe Flexis 32-bit Coldfire? V1 Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

3.10.2
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
No.
1
2
3
4
5
TPM Module Timing
C
D
D
D
D
D
External clock frequency
External clock period
External clock high time
External clock low time
Input capture pulse width
MCF51QE128 Series Advance Information Data Sheet, Rev. 4
TCLK
TPMCHn
TPMCHn
Function
Figure 17. Timer Input Capture Pulse
Figure 16. Timer External Clock
Table 13. TPM Input Timing
t
clkh
t
t
ICPW
ICPW
Symbol
t
TCLK
f
t
t
ICPW
TCLK
TCLK
t
t
clkh
clkl
t
clkl
Min
1.5
1.5
1.5
0
4
f
Max
Bus
Electrical Characteristics
—
—
—
—
/4
Unit
t
t
t
t
Hz
cyc
cyc
cyc
cyc
23