K60P100M100SF2RM Datasheet, PDF (1046/1809 Pages) Freescale Semiconductor, Inc – K60 Sub-Family Reference Manual

Functional Description
FTM counter
channel (n) input
(after the filter
channel input)
DECAPEN bit
2
1
3
4
6
5
8
7
9
12
11
10
15
14
13
16
19
18
17
20
23
22
21
24
28
27
26
25
set DECAPEN
DECAP bit
set DECAP
C(n)V
1
3
5
7
9
11
15
19
21
23
CH(n)F bit
clear CH(n)F
C(n+1)V
2
4
6
8
10
12
CH(n+1)F bit
16
20
22
24
clear CH(n+1)F
Note
- The commands set DECAPEN, set DECAP, clear CH(n)F, and clear CH(n+1)F are made by the user.
Figure 39-246. Dual Edge Capture – Continuous Mode for Positive Polarity Pulse Width
Measurement
39.4.24.4 Period Measurement
If the channels (n) and (n+1) are configured to capture consecutive edges of the same
polarity, then the period of the channel (n) input signal is measured. If both channels (n)
and (n+1) are configured to capture rising edges (ELS(n)B:ELS(n)A = 0:1 and ELS(n
+1)B:ELS(n+1)A = 0:1), then the period between two consecutive rising edges is
measured. If both channels (n) and (n+1) are configured to capture falling edges
(ELS(n)B:ELS(n)A = 1:0 and ELS(n+1)B:ELS(n+1)A = 1:0), then the period between
two consecutive falling edges is measured.
The period measurement can be made in one-shot capture mode (One-Shot Capture
Mode) or continuous capture mode (Continuous Capture Mode).
1046
K60 Sub-Family Reference Manual, Rev. 6, Nov 2011
Freescale Semiconductor, Inc.