AN2529 Freescale Semiconductor / Motorola, AN2529 Datasheet - Page 18

• Manufacturer Part Number: AN2529
• Description: Standard Space Vector Modulation - XOR version TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

AN2529/D
Synchronized Change
of PWM Prescaler
And Synchronization
Signal Prescaler
18
Standard Space Vector Modulation – XOR version TPU Function Set (svmStdXor)
The svmStdXor_sync TPU function actually uses the presc_copy parameter
instead of the prescaler parameter. The prescaler parameter holds the
prescaler value that is copied to the presc_copy by the svmStdXor_bottom
function at the time the PWM parameters are reloaded. This ensures that new
prescaler values for the PWM signals, as well as the synchronization signal, are
applied at the same time. Write the synchronization signal prescaler parameter
address to the sync_presc_addr parameter to enable this mechanism. Write 0
to disable it, and remember to set the synchronization signal presc_copy
parameter instead of the prescaler parameter in this case.
move > 0
move > 0
prescaler = 1
prescaler = 1
move < 0
move < 0
prescaler = 2
prescaler = 2
Freescale Semiconductor, Inc.
For More Information On This Product,
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Figure 6. Synchronization signal adjustment examples
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