AN2519 Freescale Semiconductor / Motorola, AN2519 Datasheet - Page 21

• Manufacturer Part Number: AN2519
• Description: 3Sin with Dead-Time Correction - XOR version TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

Resolver Reference
Signal for 3-Phase
Sine Wave
Generator with
Dead-Time
Correction – XOR
version
(3SinDtXor_res)
MOTOROLA
HSR = 10
HSR = 10
INIT
INIT
3Sin with Dead-Time Correction – XOR version TPU Function Set (3SinDtXor)
S1
S1
The 3SinDtXor_res TPU function uses information read from the 3SinDtXor_R
and 3SinDtXor_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 a number of TCR1 TPU cycles before or after the
PWM period center time.
The 3SinDtXor_res parameters are placed on the CT2 channel to keep the
channel parameter space free, available for the table of cosine values.
Freescale Semiconductor, Inc.
Figure 9. 3SinDtXor_sync state diagram
For More Information On This Product,
S2
S2
Go to: www.freescale.com
S3
S3
Detailed Function Description
AN2519/D
21