AN2519 Freescale Semiconductor / Motorola, AN2519 Datasheet - Page 17

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

Synchronization
signal for 3-Phase
Sine Wave
Generator with
Dead-Time
Correction – XOR
version
(3SinDtXor_sync)
MOTOROLA
3Sin with Dead-Time Correction – XOR version TPU Function Set (3SinDtXor)
The 3SinDtXor_sync TPU function uses information obtained from
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
in the PWM period and is always synchronized with the PWM. The
synchronization signal is a positive pulse generated repeatedly after the
prescaler PWM periods. 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 pulse width pw is another
synchronization signal parameter.
The 3SinDtXor_sync parameters are placed on the CB2 channel to keep the
channel parameter space free, available for the table of cosine values.
Freescale Semiconductor, Inc.
For More Information On This Product,
HSR = 10
INIT
flag1 = 0
flag1 = 1 – channel with momentary longest high-time
Go to: www.freescale.com
Figure 6. 3SinDtXor_R state diagram
SFC
SFR
SFR
0
0
SFC
5-times
6
th
-time
C7
C7
Detailed Function Description
HSR = 11
STOP
AN2519/D
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