TMS320TCI6618

Communications Infrastructure KeyStone SoC

www.ti.com

SPRS688—February 2011

 

7.31 RAC

The TMS320TCI6618 has two receive accelerator coprocessor (RAC) subsystems. Each RAC subsystem is a receive chip rate accelerator based on a generic correlator coprocessor (GCCP). It supports UMTS operations; assists in transferring data received from the antenna data to the receive core and performs receive functions targets at W-CDMA macro bits.

The RAC subsystem consists of several components:

2 GCCP accelerators for finger despread (FD), path monitor (PM), preamble detection (PD), and stream power estimator (SPE).

Back-end interface (BEI) for management of the RAC configuration and the data output.

Front-end interface (FEI) for reception of the antenna data for processing and access to all memory mapped registers (MMRs) and memories in the RAC components.

The RAC has a total of three ports connected to the DMA crossbar:

BEI includes two master connections to the DMA SCR for output data to device memory. One is 128-bit and the other is 64-bit, both are clocked at the same rate as the DMA crossbar.

The FEI has a slave connection to the DMA SCR for input data as well as direct memory access (to facilitate debug).

7.32 TAC

The transmit accelerator coprocessor (TAC) subsystem is a transmit chip-rate accelerator intended to support UMTS applications. For more information, see the Transmit Accelerator (TAC) for KeyStone Devices User Guide in ‘‘Related Documentation from Texas Instruments’’ on page 59.

7.33 FFTC

There are three fast Fourier transform coprocessors (FFTC) intended to accelerate FFT, IFFT, DFT, and IDFT operations.For more information, see the Fast Fourier Transform Coprocessor (FFTC) for KeyStone Devices User Guide in ‘‘Related Documentation from Texas Instruments’’ on page 59.

7.34 Emulation Features and Capability

7.34.1 Advanced Event Triggering (AET)

The TMS320TCI6618 device supports advanced event triggering (AET). This capability can be used to debug complex problems as well as understand performance characteristics of user applications. AET provides the following capabilities:

Hardware Program Breakpoints: specify addresses or address ranges that can generate events such as halting the processor or triggering the trace capture.

Data Watchpoints: specify data variable addresses, address ranges, or data values that can generate events such as halting the processor or triggering the trace capture.

Counters: count the occurrence of an event or cycles for performance monitoring.

State Sequencing: allows combinations of hardware program breakpoints and data watchpoints to precisely generate events for complex sequences.

For more information on the AET, see the following documents in ‘‘Related Documentation from Texas Instruments’’ on page 59:

Using Advanced Event Triggering to Find and Fix Intermittent Real-Time Bugs application report

Using Advanced Event Triggering to Debug Real-Time Problems in High Speed Embedded Microprocessor Systems application report

Copyright 2011 Texas Instruments Incorporated

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