K60P100M100SF2RM Datasheet, PDF (985/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Chapter 39 FlexTimer (FTM)
39.4 Functional Description
The following sections describe the FTM features.
The notation used in this document to represent the counters and the generation of the
signals is shown in the following figure.
FTM counting is up.
Channel (n) is in high-true EPWM mode.
PS[2:0] = 001
CNTIN = 0x0000
MOD = 0x0004
CnV = 0x0002
prescaler counter 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1 0 1
FTM counter
3
4
0
1
2
3
4
0
1
2
3
4
0
1
2
channel (n) output
counter
overflow
channel (n)
match
counter
overflow
channel (n)
match
Figure 39-166. Notation Used
counter
overflow
channel (n)
match
39.4.1 Clock Source
FTM module has only one clock domain that is the system clock.
39.4.1.1 Counter Clock Source
The CLKS[1:0] bits in the SC register select one of three possible clock sources for the
FTM counter or disable the FTM counter. After any MCU reset, CLKS[1:0] = 0:0 so no
clock source is selected.
The CLKS[1:0] bits may be read or written at any time. Disabling the FTM counter by
writing 0:0 to the CLKS[1:0] bits does not affect the FTM counter value or other
registers.
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.
985