AN2527 Freescale Semiconductor / Motorola, AN2527 Datasheet - Page 17

• Manufacturer Part Number: AN2527
• Description: DC Motor with Dead-Time Correction - XOR version TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

Resolver Reference
Signal for DC Motor
with Dead-Time
Correction – XOR
version
(DCmDtXor_res)
MOTOROLA DC Motor with Dead-Time Correction – XOR version TPU Function Set (DCmDtXor)
HSR = 10
HSR = 10
INIT
INIT
center_time
center_time
S1
S1
T
T
S1
S1
The DCmDtXor_res TPU function uses information read from the
DCmDtXor_C and DCmDtXor_T 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.
Figure 9. DCmDtXor_sync state diagram
For More Information On This Product,
S2
S2
Figure 8. DCmDtXor_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
AN2527/D
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