AN2519 Freescale Semiconductor / Motorola, AN2519 Datasheet - Page 3

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

Function Set Configuration
MOTOROLA
3Sin with Dead-Time Correction – XOR version TPU Function Set (3SinDtXor)
Resolver Reference Signal for the 3SinDtXor function can be used to generate
one 50% duty-cycle adjustable signal, which is also synchronized to the PWM.
The Fault Input for the 3SinDtXor function is a TPU input function that sets all
XOR gate outputs low when the input signal goes low.
None of the TPU functions in the 3-Phase Sine Wave Generator with Dead-
Time Correction – XOR version TPU function set can be used separately. The
3SinDtXor_R and 3SinDtXor_T functions have to be used together. The
3SinDtXor_R runs on pins AB1, BB1, CB1 – see
on the other pins. The 3SinDtXor_R and 3SinDtXor_T functions use a table of
32 cosine function values. The table is placed in the parameter space of four
consecutive channels. One channel running Synchronization Signal for
3SinDtXor and one channel running Resolver Reference Signal for 3SinDtXor
functions can be added to the 3SinDtXor_R and 3SinDtXor_T functions. They
can run on one of the channels where the cosine table values are placed,
because the 3SinDtXor_sync and 3SinDtXor_res parameters are placed on
two 3SinDtXor_T channels. The function Fault Input for 3SinDtXor can also be
added to the 3SinDtXor_R and 3SinDtXor_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 and resolver reference signals, that are disabled in this
configuration. The function 3SinDtXor_fault can run on one of the four channels
where the table of cosine function values is placed, because the
3SinDtXor_fault function does not have any parameters.
Table 1
3SinDtXor_R
3SinDtXor_T
Cosine table
3SinDtXor_sync
3SinDtXor_res
3SinDtXor_fault
TPU function
Freescale Semiconductor, Inc.
For More Information On This Product,
Table 1. 3SinDtXor TPU function set configuration options and
shows the configuration options and restrictions.
Go to: www.freescale.com
Mandatory
mandatory
mandatory
mandatory
Optional/
optional
optional
optional
How many
channels
restrictions
3
9
4
1
1
1
any 3 channels
any 9 channels
any 4 consecutive channels
one of Cosine Table channels
one of Cosine Table channels
one of Cosine Table channels,
recommended is 15 and DTPU bit set
Figure
Assignable channels
1. 3SinDtXor_T runs
Function Set Configuration
AN2519/D
3