AN2524 Freescale Semiconductor / Motorola, AN2524 Datasheet - Page 17

• Manufacturer Part Number: AN2524
• Description: DC Motor with Dead-Time Correction TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

Resolver Reference
Signal for DC Motor
with Dead-Time
Correction
(DCmDt_res)
MOTOROLA
HSR = 10
HSR = 10
INIT
INIT
center_time
center_time
S1
S1
T
T
S1
S1
DC Motor with Dead-Time Correction TPU Function Set (DCmDt)
The DCmDt_res TPU function uses information read from the DCmDt PWM
functions, the actual PWM center times and the PWM periods. This allows a
signal to be generated, which tracks the changes of the PWM period and is
always synchronized with the PWM. The resolver reference signal is a 50%
duty-cycle signal with a period equal to prescaler or synchronization channel
presc_copy PWM periods (see next paragraph). The low to high transition of
the pulse can be adjusted by a parameter, either negative or positive, to go
before or after the PWM period center time of a number of TCR1 TPU cycles.
S2
S2
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 10. DCmDt_sync state diagram
S2
S2
Figure 9. DCmDt_sync timing
Go to: www.freescale.com
center_time
center_time
S3
S3
T
T
S3
S3
Detailed Function Description
center_time
center_time
S1
S1
T
T
S2
S2
AN2524/D
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