AN2514 Freescale Semiconductor / Motorola, AN2514 Datasheet - Page 21

• Manufacturer Part Number: AN2514
• Description: 3-Phase Sine Wave Generator TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

Resolver Reference
Signal for 3-Phase
Sine Wave
Generator (3Sin_res)
MOTOROLA
HSR = 10
HSR = 10
INIT
INIT
S1
S1
The 3Sin_res TPU function uses information read from the 3Sin 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 a
number of TCR1 TPU cycles before or after the PWM period center time.
move > 0
prescaler = 1
move < 0
prescaler = 2
3-Phase Sine Wave Generator TPU Function Set (3Sin)
Freescale Semiconductor, Inc.
For More Information On This Product,
S2
S2
|move|
Figure 9. 3Sin_sync state diagram
Figure 10. Resolver reference signal adjustment examples
center_time
center_time
T
T
Go to: www.freescale.com
|move|
S3
S3
center_time
center_time
center_time
T
T
T
Detailed Function Description
center_time
T
AN2514/D
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