AN2531 Datasheet, PDF(3/28 Page) Motorola, Inc – Standard Space Vector Modulation with Dead-Time Correction

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AN2531 Datasheet, PDF (3/28 Pages) Motorola, Inc – Standard Space Vector Modulation with Dead-Time Correction - XOR version TPU Function Set

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Freescale Semiconductor, Inc.

AN2531/D

Function Set Configuration

function can be used to generate one or more adjustable signals for a wide

range of uses, that are synchronized to the PWM, and track changes in the

PWM period. The Resolver Reference Signal for the svmStdDtXor function can

be used to generate one or more 50% duty-cycle adjustable signals that are

also synchronized to the PWM. The Fault Input for the svmStdDtXor function is

a TPU input function that sets all XOR gate outputs low when the input signal

goes low.

Function Set Configuration

None of the TPU functions in the Standard Space Vector Modulation with

Dead-Time Correction â XOR version TPU function set can be used

separately. The svmStdDtXor_R and svmStdDtXor_T functions have to be

used together. The svmStdDtXor_R runs on pins AB1, BB1, CB1 â see Figure

1. The svmStdDtXor_T runs on the other pins. One or more channels running

Synchronization Signal for svmStdDtXor as well as Resolver Reference

Signals for svmStdDtXor functions can be added to the svmStdDtXor_R and

svmStdDtXor_T functions. They can run with different settings on each

channel. The function Fault Input for svmStdDtXor can also be added to the

svmStdDtXor_R and svmStdDtXor_T functions. It is recommended to use it on

channel 15, and to set the hardware option that disables all TPU output pins

when the channel 15 input signal is low (DTPU bit = 1). This ensures that the

hardware reacts quickly to a pin fault state. Note that it is not only the PWM

channels, but all TPU output channels, including the synchronization signals,

that are disabled in this configuration.

Table 1 shows the configuration options and restrictions.

Table 1. svmStdDtXor TPU function set configuration options and

restrictions

TPU function

svmStdDtXor_R

svmStdDtXor_T

svmStdDtXor_sync

svmStdDtXor_res

svmStdDtXor_fault

Optional/

Mandatory

mandatory

optional

How many

channels

Assignable channels

any 3 channels

any 9 channels

1 or more any channels

any, recommended is 15 and

DTPU bit set

MOTOROLA

Standard SVM with Dead-Time Correction â XOR version (svmStdDtXor)

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