FTMx_DEADTIME field descriptions (continued)
Field
Description
10
Divide the system clock by 4.
11
Divide the system clock by 16.
5–0
DTVAL
Deadtime Value
Selects the deadtime insertion value for the deadtime counter. The deadtime counter is clocked by a
scaled version of the system clock. See the description of DTPS.
Deadtime insert value = (DTPS × DTVAL).
DTVAL selects the number of deadtime counts inserted as follows:
When DTVAL is 0, no counts are inserted.
When DTVAL is 1, 1 count is inserted.
When DTVAL is 2, 2 counts are inserted.
This pattern continues up to a possible 63 counts.
This field is write protected. It can be written only when MODE[WPDIS] = 1.
38.3.16 FTM External Trigger (FTMx_EXTTRIG)
This register:
• Indicates when a channel trigger was generated
• Enables the generation of a trigger when the FTM counter is equal to its initial value
• Selects which channels are used in the generation of the channel triggers
Several channels can be selected to generate multiple triggers in one PWM period.
Channels 6 and 7 are not used to generate channel triggers.
Address: Base a 6Ch offset
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
R
W
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Memory map and register definition
K22F Sub-Family Reference Manual , Rev. 3, 7/2014
848
Freescale Semiconductor, Inc.
