Information

35.4.10.2 MOD register update
The following table describes when MOD register is updated:
Table 35-184. MOD register update
When Then MOD register is updated
CLKS[1:0] = 0:0 When MOD register is written, independent of FTMEN bit.
• CLKS[1:0] ≠ 0:0, and
• FTMEN = 0
According to the CPWMS bit, that is:
• If the selected mode is not CPWM then MOD register is updated after MOD
register was written and the FTM counter changes from MOD to CNTIN. If
the FTM counter is at free-running counter mode then this update occurs
when the FTM counter changes from 0xFFFF to 0x0000.
• If the selected mode is CPWM then MOD register is updated after MOD
register was written and the FTM counter changes from MOD to (MOD –
0x0001).
• CLKS[1:0] ≠ 0:0, and
• FTMEN = 1
By the MOD register synchronization.
35.4.10.3 CnV register update
The following table describes when CnV register is updated:
Table 35-185. CnV register update
When Then CnV register is updated
CLKS[1:0] = 0:0 When CnV register is written, independent of FTMEN bit.
• CLKS[1:0] ≠ 0:0, and
• FTMEN = 0
According to the selected mode, that is:
• If the selected mode is Output Compare, then CnV register is updated on
the next FTM counter change, end of the prescaler counting, after CnV
register was written.
• If the selected mode is EPWM, then CnV register is updated after CnV
register was written and the FTM counter changes from MOD to CNTIN. If
the FTM counter is at free-running counter mode then this update occurs
when the FTM counter changes from 0xFFFF to 0x0000.
• If the selected mode is CPWM, then CnV register is updated after CnV
register was written and the FTM counter changes from MOD to (MOD –
0x0001).
• CLKS[1:0] ≠ 0:0, and
• FTMEN = 1
According to the selected mode, that is:
• If the selected mode is output compare then CnV register is updated
according to the SYNCEN bit. If (SYNCEN = 0) then CnV register is updated
after CnV register was written at the next change of the FTM counter, the
end of the prescaler counting. If (SYNCEN = 1) then CnV register is updated
by the C(n)V and C(n+1)V register synchronization.
• If the selected mode is not output compare and (SYNCEN = 1) then CnV
register is updated by the C(n)V and C(n+1)V register synchronization.
Functional description
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
766 Freescale Semiconductor, Inc.