AN2519 Freescale Semiconductor / Motorola, AN2519 Datasheet - Page 4

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

AN2519/D
Configuration Order
4
3Sin with Dead-Time Correction – XOR version TPU Function Set (3SinDtXor)
Table 2
Table 3
The CPU configures the TPU as follows.
1. Disables the channels by clearing the two channel priority bits on each
2. Selects the channel functions on all used channels by writing the
3. Initializes function parameters. The parameters T, prescaler, DT,
Freescale Semiconductor, Inc.
3SinDtXor_sync
3SinDtXor_fault
3SinDtXor_res
TPU function
3SinDtXor_R
3SinDtXor_T
For More Information On This Product,
channel used (not necessary after reset).
function numbers to the channel function select bits.
Theta_H, Theta_L and sync_presc_addr must be set before
initialization. 32 cosine table values must be set. If an 3SinDt_sync
channel or an 3SinDt_res channel is used, then its parameters must also
be set before initialization.
Channel
shows an example of configuration.
shows the TPU function code sizes.
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
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Table 2. Example of configuration
Table 3. TPU function code sizes
3SinDtXor_sync, Cosine table 2
3SinDtXor_fault, Cosine table 4
3SinDtXor_res, Cosine table 3
317 µ instructions + 8 entries = 325 long words
30 µ instructions + 8 entries = 38 long words
41 µ instructions + 8 entries = 49 long words
Cosine table 1
TPU function
9 µ instructions + 8 entries = 17 long words
3 µ instructions + 8 entries = 11 long words
3SinDtXor_R
3SinDtXor_R
3SinDtXor_R
3SinDtXor_T
3SinDtXor_T
3SinDtXor_T
3SinDtXor_T
3SinDtXor_T
3SinDtXor_T
3SinDtXor_T
3SinDtXor_T
3SinDtXor_T
Code size
Priority
middle
middle
middle
middle
middle
middle
middle
middle
middle
middle
middle
middle
none
high
low
low
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