AN2533/D

Detailed Function Description

MOTOROLA

Standard SVM – 3 outputs version – XOR version TPU Function Set (svmStd3Xor)

13

Figure 5. svmStd3Xor_R state diagram

Synchronization

signal for Standard

Space Vector

Modulation – 3

outputs version –

XOR version

(svmStd3Xor_sync)

The svmStd3Xor_sync TPU function uses information obtained from

svmStd3Xor_R and svmStd3Xor_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.

C5

SFC

0

SFR

0

C5

SFR

SFC

INIT

HSR = 10

3-times

4th-time

STOP

HSR = 11

flag1 = 0

flag1 = 1 – channel with momentary longest high-time

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