mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 237
mcf51ac256a
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mcf51ac256a
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Mcf51ac Flexis
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MCF51AC256A.pdf
(566 pages)
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The CHnF bit is set and the channel (n) interrupt is generated (if CHnIE = 1) at the channel (n) match
(when the FTM counter = FTMxCnVH:FTMxCnVL).
It is possible to use the output compare mode with (ELSnB:ELSnA = 0:0). In this case, when the counter
reaches the value in the FTMxCnVH:FTMxCnVL registers the CHnF bit is set and the channel (n)
interrupt is generated (if CHnIE = 1), however the channel (n) output is not modified and controlled by
FTM.
Freescale Semiconductor
Figure 11-35. Example of the output compare mode when the match toggles the channel output
Figure 11-36. Example of the output compare mode when the match clears the channel output
Figure 11-37. Example of the output compare mode when the match sets the channel output
FTMx
FTMx
FTMx
FTMx
FTMx
FTMx
channel (n) output
MODH:L = 0x0005
CnVH:L = 0x0003
MODH:L = 0x0005
CnVH:L = 0x0003
channel (n) output
channel (n) output
MODH:L = 0x0005
CnVH:L = 0x0003
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
FTMxCNTH:L
FTMxCNTH:L
FTMxCNTH:L
CHnF bit
CHnF bit
CHnF bit
TOF bit
TOF bit
TOF bit
overflow
overflow
overflow
counter
counter
counter
...
...
...
previous value
previous value
previous value
previous value
previous value
previous value
0
0
0
1
1
1
channel (n)
channel (n)
channel (n)
match
2
2
match
2
match
3
3
3
4
4
4
overflow
overflow
overflow
counter
counter
counter
5
5
5
0
0
0
1
1
1
channel (n)
channel (n)
channel (n)
2
2
2
match
match
match
3
3
3
4
4
4
overflow
overflow
overflow
counter
counter
counter
5
5
5
0
0
0
FlexTimer Module (FTMV1)
1
1
1
...
...
...
11-37
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