mcf51cn128 Freescale Semiconductor, Inc, mcf51cn128 Datasheet - Page 28

• Manufacturer Part Number: mcf51cn128
• Description: Mcf51cn128 Coldfire Microcontroller Cover Mcf51cn128
• Manufacturer: Freescale Semiconductor, Inc

Electrical Characteristics
3.12.2
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.
28
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
MCF51CN128 ColdFire Microcontroller Data Sheet, Rev. 4
TCLK
TPMCHn
TPMCHn
Function
Figure 22. Timer Input Capture Pulse
Figure 21. Timer External Clock
Table 18. TPM Input Timing
t
clkh
t
t
ICPW
ICPW
Symbol
t
TCLK
t
f
t
ICPW
TCLK
TCLK
t
t
clkh
clkl
t
clkl
Min
1.5
1.5
1.5
0
4
f
Max
Bus
—
—
—
—
Freescale Semiconductor
/4
Unit
t
t
t
t
Hz
cyc
cyc
cyc
cyc