mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 796

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Introduction
FlexTimer input triggers can be from comparators, ADC or other sub modules to initiate
timer functions automatically. These triggers can be linked in a variety of ways during
integration of the sub modules so please note carefully the options available for used
FlexTimer configuration.
All main user access registers are buffered to ease the load on the executing software. A
number of trigger options exist to determine which registers are updated with this user
defined data.
37.1.2 Features
The FTM features include:
796
• FTM source clock is selectable
• Prescaler divide-by 1, 2, 4, 8, 16, 32, 64, or 128
• FTM has a 16-bit counter
• Each channel can be configured for input capture, output compare, or edge-aligned
• In input capture mode
• In output compare mode the output signal can be set, cleared, or toggled on match
• All channels can be configured for center-aligned PWM mode
PWM mode
• Source clock can be the system clock, the fixed frequency clock, or an external
• Fixed frequency clock is an additional clock input to allow the selection of an on
• Selecting external clock connects FTM clock to a chip level input pin therefore
• It can be a free-running counter or a counter with initial and final value
• The counting can be up or up-down
• the capture can occur on rising edges, falling edges or both edges
• an input filter can be selected for some channels
clock
chip clock source other than the system clock
allowing to synchronize the FTM counter with an off chip clock source
MCF51JF128 Reference Manual, Rev. 2, 03/2011
Preliminary
Freescale Semiconductor, Inc.