NXP Semiconductors KTFRDM34933EVBUG, Руководство пользователя, Страница: 24 / 39

NXP Semiconductors
KTFRDM34933EVBUG
FRDM-34933EVB evaluation board
KTFRDM34933EVBUG All information provided in this document is subject to legal disclaimers. © NXP B.V. 2017. All rights reserved.
User guide Rev. 1.0 — 15 March 2017
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Figure 11. Stepper mode configuration that affects minimum full-stepping speed
Possible values for the timer input frequency (counter frequency property in
TimerUnit_LDD) are shown in Table 11 . Input frequency values depend on LVHBridge
component settings. Note that two frequency values are needed in "full-step and micro-
step mode". In one case LVHBridge component switches in runtime between these two
values.
Table 11. Minimum and maximum timer input frequency per stepper control mode
LVHBridge component properties Primary timer input frequency Mode
description
Timer device Secondary
timer
Output
control
Motor
control
mode
Values Min. Max.
Secondary
timer input
frequency
Full-step
mode
TPM Don't care PWM Full-step 1 131 kHz 1.0 MHz Any value
(user
selection)
Full-step
and micro-
step mode
TPM Don't care PWM Full-step and
micro-step
1 1.2 MHz 10 MHz Any value
(user
selection)
Full-step
mode (SW
control)
FTM or TPM Disabled GPIO Full-step 1 131 kHz 1.0 MHz Secondary
timer is not
enabled
Full-step
mode
FTM Disabled PWM Full-step 1 131 kHz 1.0 MHz Secondary
timer is not
enabled
Full-step
mode
FTM Enabled PWM Full-step 1 131 kHz 1.0 MHz The same
values as for
primary timer
Full-step
and micro-
step mode
FTM
Disabled PWM Full-step and
micro-step 2
1st value
for full-step:
131 kHz
1st value
for Full-
step: 1 MHz
Secondary
timer is not
enabled