
FTM counter
...
...
FTM counting is up
TOF bit
0x0005 0x0015 0x0016
0xFFFE 0xFFFF 0x0000 0x0001 0x0002 0x0003 0x0004 0x0005 0x0015 0x0016
MOD = 0x0005
CNTIN = 0x0015
set TOF bit
set TOF bit
load of CNTIN
load of CNTIN
...
counter event
counter event
Figure 41-6. Example of up counting when the value of CNTIN is greater than the value
of MOD
41.5.3.2 Up-down counting
Up-down counting is selected when:
• QUADEN = 0, and
• CPWMS = 1
CNTIN defines the starting value of the count and MOD defines the final value of the
count. The value of CNTIN is loaded into the FTM counter, and the counter increments
until the value of MOD is reached, at which point the counter is decremented until it
returns to the value of CNTIN and the up-down counting restarts.
The FTM period when using up-down counting is 2 × (MOD – CNTIN) × period of the
FTM counter clock.
The TOF bit is set when the FTM counter changes from MOD to (MOD – 1).
If (CNTIN = 0x0000), the FTM counting is equivalent to TPM up-down counting, that is,
up-down and unsigned counting. See the following figure.
Functional description
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
1026
NXP Semiconductors
Summary of Contents for KE1xF Series
Page 2: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 2 NXP Semiconductors...
Page 138: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 138 NXP Semiconductors...
Page 360: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 360 NXP Semiconductors...
Page 490: ...Interrupts Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 490 NXP Semiconductors...
Page 562: ...Boot Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 562 NXP Semiconductors...
Page 706: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 706 NXP Semiconductors...
Page 736: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 736 NXP Semiconductors...
Page 866: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 866 NXP Semiconductors...
Page 1164: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1164 NXP Semiconductors...
Page 1178: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1178 NXP Semiconductors...
Page 1380: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1380 NXP Semiconductors...
Page 1472: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1472 NXP Semiconductors...
Page 1482: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1482 NXP Semiconductors...