mcf51ac256 Freescale Semiconductor, Inc, mcf51ac256 Datasheet - Page 30

• Manufacturer Part Number: mcf51ac256
• Description: Mcf51ac256 Coldfire Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Preliminary Electrical Characteristics
2.11.2
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.
30
NUM
1
2
3
4
5
Timer (TPM/FTM) Module Timing
—
—
C
D
D
D
External clock frequency
External clock period
External clock high time
External clock low time
Input capture pulse width
TPMxCLK
MCF51AC256 ColdFire Microcontroller Data Sheet, Rev.1
TPMxCHn
TPMxCHn
IRQ/KBIPx
IRQ/KBIPx
Preliminary—Subject to Change Without Notice
Figure 12. Timer Input Capture Pulse
Function
Table 18. TPM/FTM Input Timing
Figure 11. Timer External Clock
Figure 10. IRQ/KBIPx Timing
t
clkh
t
t
ICPW
ICPW
t
TPMext
t
t
IHIL
ILIH
Symbol
f
t
TPMext
TPMext
t
t
ICPW
t
clkh
clkl
t
clkl
Min
DC
1.5
1.5
1.5
4
Freescale Semiconductor
f
Max
Bus
—
—
—
—
/4
MHz
Unit
t
t
t
t
cyc
cyc
cyc
cyc