mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 257
mcf51ac256a
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mcf51ac256a
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Mcf51ac Flexis
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Freescale Semiconductor, Inc
Datasheet
1.MCF51AC256A.pdf
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11.4.11.5 FTMxCnVH:FTMxCnVL synchronization
The FTMxCnVH:L synchronization occurs when the FTMxCnVH:L registers are updated with the value
of their write buffer.
The synchronization requires both bytes of FTMxCnVH:L to have been written, SYNCEN = 1 and either
a hardware or software trigger event as per FTMxMODH:L synchronization
“FTMxMODH:FTMxMODL
11.4.11.6 CHnOM synchronization
Any write to a CHnOM bit updates the FTMxOUTMASK write buffer. The CHnOM bit is updated with
the value of its corresponding bit in the FTMxOUTMASK write buffer according to the SYNCHOM bit.
If SYNCHOM = 0, then the CHnOM bit is updated with the value of its write buffer equivalent in all rising
edges of the system clock.
If SYNCHOM = 1, then this synchronization is made on the next enabled trigger event. If the trigger event
was a software trigger, then the SWSYNC bit is cleared on the next selected boundary cycle
Freescale Semiconductor
Figure 11-67. FTMxMODH:L synchronization when (REINIT = 1) and (a hardware trigger was used)
write buffer of CHnOM bit
write to CHnOM bit
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
write 1 to TRIG0 bit
Figure 11-68. CHnOM synchronization when (SYNCHOM = 0)
system clock
CHnOM bit
trigger 0 event
system clock
TRIG0 bit
synchronization).
set CHnOM
clear CHnOM
are updated if both bytes
FTMxMODH:L registers
were written
(Section 11.4.11.4,
FlexTimer Module (FTMV1)
11-57
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