gtb_out signals, represented by the example glue logic shown in the figure. Note that
these configurations are chip-dependent and implemented outside of the FTM modules.
See the chip-specific FTM information for the chip's specific implementation.
NOTE
• In order to use the GTB signals to synchronize the FTM
counter of different FTM modules, the configuration of
each FTM module should guarantee that its FTM counter
starts counting as soon as the gtb_in signal is 1.
• The GTB feature does not provide continuous
synchronization of FTM counters, meaning that the FTM
counters may lose synchronization during FTM operation.
The GTB feature only allows the FTM counters to start
their operation synchronously.
41.5.31.1 Enabling the global time base (GTB)
To enable the GTB feature, follow these steps for each participating FTM module:
1. Stop the FTM counter: Write 00b to SC[CLKS].
2. Program the FTM to the intended configuration. The FTM counter mode needs to be
consistent across all participating modules.
3. Write 1 to CONF[GTBEEN] and write 0 to CONF[GTBEOUT] at the same time.
4. Select the intended FTM counter clock source in SC[CLKS]. The clock source needs
to be consistent across all participating modules.
5. Reset the FTM counter: Write any value to the CNT register.
To initiate the GTB feature in the configuration described in the preceding figure, write 1
to CONF[GTBEOUT] in the FTM module used as the time base.
41.5.32 Output Logic
The following figure shows the output logic of each FTM channel output including how
each PWM output has individual fault disabling and output enable. This allows flexibility
regarding the external circuitry interface.
The output buffer logic depends on PWM_EN bit of FTM_SC register and fault disable
channel output logic (see
to more details) . Channel outputs will be enabled
only if PWM_EN is enabled and there is no fault event ongoing configured to tri-state the
outputs by FSTATE bit at FTM_FLTCTRL register. Note that Polarity logic will act
before channel enable logic. Therefore, it is imperative that the user program the channel
Chapter 41 FlexTimer Module (FTM)
Kinetis KE1xF Sub-Family Reference Manual, Rev. 4, 06/2019
NXP Semiconductors
1103
Содержание KE1xF Series
Страница 2: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 2 NXP Semiconductors...
Страница 60: ...SysTick Clock Configuration Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 60 NXP Semiconductors...
Страница 114: ...Initialization application information Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 114 NXP Semiconductors...
Страница 138: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 138 NXP Semiconductors...
Страница 320: ...Private Peripheral Bus PPB memory map Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 320 NXP Semiconductors...
Страница 342: ...Functional Description Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 342 NXP Semiconductors...
Страница 360: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 360 NXP Semiconductors...
Страница 490: ...Interrupts Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 490 NXP Semiconductors...
Страница 550: ...Memory map and register definition Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 550 NXP Semiconductors...
Страница 562: ...Boot Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 562 NXP Semiconductors...
Страница 662: ...Power supply supervisor Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 662 NXP Semiconductors...
Страница 694: ...On chip resource access control mechanism Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 694 NXP Semiconductors...
Страница 706: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 706 NXP Semiconductors...
Страница 724: ...Application Information Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 724 NXP Semiconductors...
Страница 736: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 736 NXP Semiconductors...
Страница 750: ...Debug and Security Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 750 NXP Semiconductors...
Страница 798: ...Functional description Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 798 NXP Semiconductors...
Страница 808: ...Functional description Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 808 NXP Semiconductors...
Страница 866: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 866 NXP Semiconductors...
Страница 1164: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1164 NXP Semiconductors...
Страница 1178: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1178 NXP Semiconductors...
Страница 1380: ...Usage Guide Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1380 NXP Semiconductors...
Страница 1472: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1472 NXP Semiconductors...
Страница 1482: ...Kinetis KE1xF Sub Family Reference Manual Rev 4 06 2019 1482 NXP Semiconductors...