AN2531/D Motorola / Freescale Semiconductor, AN2531/D Datasheet - Page 18

• Manufacturer Part Number: AN2531/D
• Description: Standard Space Vector Modulation with Dead-Time Correction - XOR version TPU Function Set
• Manufacturer: Motorola / Freescale Semiconductor

AN2531/D
Synchronization
signal for Standard
Space Vector
Modulation with
Dead-Time
Correction – XOR
version
(svmStdDtXor_sync)
18
Standard SVM with Dead-Time Correction – XOR version (svmStdDtXor)
The svmStdDtXor_sync TPU function uses information obtained from
StdDtXor_R and svmStdDtXor_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 or 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 pulse width pw is another synchronization signal parameter.
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. svmStdDtXor_R state diagram
SFC
SFR
SFR
0
0
SFC
3-times
4
th
-time
C5
C5
MOTOROLA
HSR = 11
STOP