Multicore Fixed and Floating-Point System-on-Chip
Copyright 2012 Texas Instruments Incorporated
TMS320C6670 Peripheral Information and Electrical Specifications
211
SPRS689D—March 2012
TMS320C6670
7.22 Rake Search Accelerator (RSA)
There are four Rake Search Accelerators (RSAs) on the device. CorePac1 and CorePac2 each have one set of
directly-connected RSA pairs. The RSA is an extension of the C66x CPU. The CPU performs send/receive to the
RSAs via the .L and .S functional units.
7.23 Enhanced Viterbi-Decoder Coprocessor (VCP2)
The device has four high-performance embedded Viterbi Decoder Coprocessors (VCP2) that significantly speed up
channel-decoding operations on-chip. Each VCP2, operating at CPU clock divided-by-3, can decode more than 694
7.95-Kbps adaptive multi-rate (AMR) [K = 9, R = 1/3] voice channels. The VCP2 supports constraint lengths K = 5,
6, 7, 8, and 9, rates R = 3/4, 1/2, 1/3, 1/4, and 1/5, and flexible polynomials, while generating hard decisions or soft
decisions. Communications between the VCP2 and the CPU are carried out through the EDMA3 controller. The
VCP2 supports:
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Unlimited frame sizes
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Code rates 3/4, 1/2, 1/3, 1/4, and 1/5
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Constraint lengths 5, 6, 7, 8, and 9
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Programmable encoder polynomials
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Programmable reliability and convergence lengths
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Hard and soft decoded decisions
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Tail and convergent modes
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Yamamoto logic
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Tail biting logic
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Various input and output FIFO lengths
For more information, see the
Viterbi Coprocessor (VCP2) for KeyStone Devices User Guide
Documentation from Texas Instruments’’ on page 66
7.24 Turbo Decoder Coprocessor (TCP3d)
The C6670 has two high-performance embedded Turbo-Decoder Coprocessors (TCP3d) that significantly speed up
channel-decoding operations on-chip for WCDMA, HSPA, HSPA+, TD-SCDMA, LTE, and WiMAX. Operating at
CPU clock divided-by-2, the TCP3d is capable of processing data channels at a throughput of >100 Mbps. For more
information, see the
Turbo Decoder Coprocessor 3 (TCP3d) for KeyStone Devices User Guide
Documentation from Texas Instruments’’ on page 66
7.25 Turbo Encoder Coprocessor (TCP3e)
The C6670 has a high-performance embedded Turbo-Encoder Coprocessor (TCP3e) that significantly speeds up
channel-encoding operations on-chip for WCDMA, HSPA, HSPA+, TD-SCDMA, LTE, and WiMAX. Operating at
CPU clock divided-by-3, the TCP3e is capable of processing data channels at a throughput of >200 Mbps. For more
information, see the
Turbo Encoder Coprocessor 3 (TCP3e) for KeyStone Devices User Guide
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