mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 220

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

FlexTimer Module (FTMV1)
11.3.13 FTM Output Mask Register (FTMxOUTMASK)
This read/write register provides a mask for each FTM channel. The mask of a channel determines if its
output will respond (that is, it will be masked or not) when a match occurs. This feature is used for BLDC
control where the PWM signal is presented to an electric motor at specific times to provide electronic
commutation.
Any write to the FTMxOUTMASK register, stores the value into a write buffer. The register is updated
with the value of its write buffer according to
11.3.14 FTM Function For Linked Channels Register (FTMxCOMBINEm)
This read/write register contains the control bits used to configure the fault control, synchronization,
deadtime, complementary and combine features of channels (n) and (n+1).
11-20
Reset
Reset
W
W
R
R
CHnOM
Field
CHnOI
7-0
Field
7-0
CH7OM
CH7OI
0
0
7
7
Figure 11-15. FTM Initial State for Channels Output Register (FTMxOUTINIT)
Channel (n) output mask. CHnOM bit defines if the channel (n) output is masked (forced to its inactive
state) or unmasked (it continues to operate normally).
0 Channel (n) output is not masked. It continues to operate normally.
1 Channel (n) output is masked. It is forced to its inactive state.
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
= Unimplemented or Reserved
= Unimplemented or Reserved
Channel (n) output initialization value. CHnOI bit selects the value that is forced into channel (n)
output when the initialization occurs.
0 The initialization value is the logical value 0.
1 The initialization value is the logical value 1.
CH6OM
CH6OI
Figure 11-16. FTM Output Mask Register (FTMxOUTMASK)
0
0
6
6
Table 11-13. FTMxOUTMASK Field Descriptions
Table 11-12. FTMxOUTINIT Field Descriptions
CH5OM
CH5OI
5
0
5
0
Section 11.4.11, “PWM
CH4OM
CH4OI
0
0
4
4
Description
Description
CH3OM
CH3OI
0
0
3
3
CH2OM
synchronization.
CH2OI
0
0
2
2
CH1OM
CH1OI
Freescale Semiconductor
1
0
1
0
CH0OM
CH0OI
0
0
0
0