AN2515 Freescale Semiconductor / Motorola, AN2515 Datasheet - Page 2

• Manufacturer Part Number: AN2515
• Description: 3-Phase Sine Wave Generator - 3 outputs version TPU Function Set
• Manufacturer: Freescale Semiconductor / Motorola

AN2515/D
Function Set Configuration
2
3-Phase Sine Wave Generator – 3 outputs version TPU Function Set (3Sin3)
The Synchronization Signal for the 3Sin3 function can be used to generate one
or more adjustable signals for a wide range of uses, which are synchronized to
the PWM, and track changes in the PWM period. The Resolver Reference
Signal for the 3Sin3 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 3Sin3 function is a TPU input function that sets all PWM outputs low
when the input signal goes low. See
The 3-Phase Sine Wave Generator – 3 outputs version TPU function is the
main function of the set. It can be used either alone, with some of the
supporting functions, or with all of them. The 3Sin3 function uses a table of 32
cosine function values. The table is placed in the parameter space of four
consecutive channels. One or more channels running a Synchronization Signal
for the 3Sin3 as well as Resolver Reference Signals for the 3Sin3 functions can
be added to the 3Sin3 function. They can run with different settings on each
channel. The function Fault Input for 3Sin3 can also be added to the 3Sin3
function. It is recommended to use it on channel 15, and to select 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.
The function 3Sin3_fault can run on one of the four channels where the table
of cosine function values is placed, because the 3Sin3_fault function does not
have any parameters.
Table 1
3Sin3
Cosine table
3Sin3_sync
3Sin3_res
3Sin3_fault
TPU function
Table 1. 3Sin3 TPU function set configuration options and restrictions
Freescale Semiconductor, Inc.
For More Information On This Product,
shows the configuration options and restrictions.
Go to: www.freescale.com
Mandatory
mandatory
mandatory
Optional/
optional
optional
optional
How many
channels
1 or more
1 or more
3
4
1
Figure
any 3 channels
any 4 consecutive channels
any channels
any channels
any, recommended is 15 and DTPU bit
set
1.
Assignable channels
MOTOROLA