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TMS320TCI649 Series
Texas Instruments TMS320TCI649 Series Manuals
Manuals and User Guides for Texas Instruments TMS320TCI649 Series. We have
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Texas Instruments TMS320TCI649 Series manual available for free PDF download: User Manual
Texas Instruments TMS320TCI649 Series User Manual (48 pages)
DSP / Viterbi-Decoder Coprocessor 2 (VCP2)
Brand:
Texas Instruments
| Category:
Control Unit
| Size: 0.26 MB
Table of Contents
Table of Contents
3
Preface
6
Features
7
Introduction
8
Convolutional Encoder Example Block Diagram
8
Trellis Diagram for Convolutional Encoder Example
9
Overview
10
VCP2 Block Diagram
10
Input Data
11
Branch Metrics Calculations
11
Branch Metrics for Rate
11
Soft Input Dynamic Ranges
12
Branch Metrics for Rate
12
VCP2 Soft Inputs Quantization
12
Decision Data
13
Registers
14
VCP2 Registers
14
VCP2 Memories
14
VCP2 Peripheral Identification Register (VCPPID)
15
VCP2 Peripheral ID Register (VCPPID)
15
VCP2 Peripheral ID Register (VCPPID) Field Descriptions
15
VCP2 Input Configuration Register 0 (VCPIC0)
16
VCP2 Input Configuration Register 0 (VCPIC0) Field Descriptions
16
VCP2 Input Configuration Register 1 (VCPIC1)
17
VCP2 Input Configuration Register 1 (VCPIC1) Field Descriptions
17
VCP2 Input Configuration Register 2 (VCPIC2)
18
VCP2 Input Configuration Register 2 (VCPIC2) Field Descriptions
18
VCP2 Input Configuration Register 3 (VCPIC3)
19
VCP2 Input Configuration Register 3 (VCPIC3) Field Descriptions
19
VCP2 Input Configuration Register 4 (VCPIC4)
20
VCP2 Input Configuration Register 4 (VCPIC4) Field Descriptions
20
VCP2 Input Configuration Register 5 (VCPIC5)
21
VCP2 Input Configuration Register 5 (VCPIC5) Field Descriptions
21
VCP2 Output Register 0 (VCPOUT0)
22
VCP2 Output Register 0 (VCPOUT0) Field Descriptions
22
VCP2 Output Register 1 (VCPOUT1)
23
VCP2 Output Register 1 (VCPOUT1) Field Descriptions
23
VCP2 Execution Register (VCPEXE)
24
VCP2 Execution Register (VCPEXE) Field Descriptions
24
VCP2 Endian Mode Register (VCPEND)
25
VCP2 Endian Mode Register (VCPEND) Field Descriptions
25
VCP2 Status Register 0 (VCPSTAT0)
26
VCP2 Status Register 0 (VCPSTAT0) Field Descriptions
26
VCP2 Status Register 1 (VCPSTAT1)
27
VCP2 Status Register 1 (VCPSTAT1) Field Descriptions
27
VCP2 Error Register (VCPERR)
28
VCP2 Error Register (VCPERR) Field Descriptions
28
VCP2 Emulation Control Register (VCPEMU)
30
VCP2 Emulation Control Register (VCPEMU) Field Descriptions
30
Endianness
31
Branch Metrics
31
Data Source - VBUSP/DMA (BM = 1)
31
Data Destination - Kernel for Processing Unit (BM = 1)
31
Branch Metrics in DSP Memory (BM = 1)
31
Data Source - VBUSP/DMA (BM = 0)
32
Data Destination - Kernel for Processing Unit (BM = 0)
32
Branch Metrics in DSP Memory (BM = 0)
32
Trellis Stage Ordering of Hard Decisions in 32-Bit Word (OUT_ORDER = 0)
33
Trellis Stage Ordering of Hard Decisions in 32-Bit Word (OUT_ORDER = 1)
33
Soft Decision Organization
33
Architecture
34
Sliding-Windows Processing
34
Processing Unit
34
Tailed Traceback Mode
34
Mixed Traceback Mode-Example with Five Sliding Windows
35
Convergent Traceback Mode-Example with Five Sliding Windows
35
Traceback Soft Decision Sliding Window Limits
36
Traceback Hard Decision Sliding Window Limits
36
Yamamoto Parameters
37
Input FIFO (Branch Metrics)
37
Output FIFO (Decisions)
37
Code Rate Versus SYMX
37
Programming
39
EDMA3 Resources
39
EDMA3 Parameters Structure
39
Required EDMA3 Links Per User Channel
39
Branch Metrics
40
Input Configuration Words
43
Output Parameters
43
Event Generation
44
11.1 VCPXEVT Generation
44
11.2 VCPREVT Generation
44
Operational Modes
45
12.1 Debugging Features
45
Errors and Status
46
Appendix A Revision History
47
Tci648X/9X Revision History
47
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