Viterbi Decoding Techniques in the TMS320C54x Family (Rev. A)
Texas InstrumentsIn most wireless communications systems convolutional coding is the preferred method of error-correction coding to overcome transmission distortions. This report outlines the theory of convolutional coding and decoding and explains the programming techniques for Viterbi decoding in the Texas Instruments (TI) TMS320C54™ generation of digital signal processors (DSPs). The same basic methods d
JPEG Netcam2 on the DM642 EVM (Rev. A)
Texas InstrumentsThis software demonstration combines real-time D1 Joint Photographic Experts Group (JPEG) encoding of images on the DM642 Evaluation Module (EVM) with networking functionality.
The JPEG standard pertains to compression of still images. Performing JPEG at the rate of 30 frames per second in isolation as individual images is known as motion JPEG (MJPEG). This demonstration uses:
- JPE
AN-2292 Designing an Isolated Buck (Fly-Buck) Converter (Rev. C)
Texas InstrumentsIn many applications one or more low-cost simple to use isolated power supplies working from input voltages up to 100 V are needed. Traditional solutions use flyback converters to generate this bias supply. Flyback designs typically utilize asymmetric transformers turns ratios for primary and secondary power windings with an optocoupler and reference or an auxiliary winding for feedback regul
Implementing An Ultralow-Power Keypad Interface with MSP430
Texas InstrumentsOften in applications with keypads, the condition can occur where a key can be held or stuck down, causing excess current consmption and reducing the battery life of a battery-operated product. This
MSP430C112 IrDA SIR Encoder/Decoder
Texas InstrumentsThis report gives a short overview on the use of the MSP430x112 as an IrDA SIR encoder/decoder. The hardware is discussed including a block diagram and an IrDA module schematic diagram. The next sections deal with programming and user interface issues. Appendix A presents applicable IrDA software.
OMAP3530 Power Consumption Summary
Texas InstrumentsThis article has been contributed to the TI Developer Wiki. To see the most recently updated version or to contribute visit this topic at: http://wiki.davincidsp.com/index.php/OMAP3530_Power_Estimation_Spreadsheet.
Power consumption on the OMAP3530 device is highly application-dependent therefore a sp
AN-1238 Wide Bus Applications Using Parallel BLVDS SerDes Devices
Texas InstrumentsApplication Note 1238 Wide Bus Applications Using Parallel BLVDS SerDes Devices
Achieving Stable VGS Using LM5050-1 with Low Current and Noisy Input Supply
Texas InstrumentsLM5050-1 Achieving Stable VGS Using LM5050-1 with Low Current and Noisy Input Supply
AN-1509 PhyterDual Flexible Port Switching (Rev. B)
Texas InstrumentsTexas Instruments flexible port switching offers an unprecedented number of ways for system designers todevelop solutions that address specific application needs with the minimum number of components. Thecombination of flexible assignment of data paths between ports and the ability to change theseassignments dynamically allow one part to meet many different needs. In addition to this flexibi
Sensorless Speed Controlled Brushless D Drive Using TMS320C242 DSP Controller
Texas InstrumentsThe Brushless DC (BLDC) variable-speed drive is widely used because of its particularly high mechanical power density simplicity and cost effectiveness. A software rotor position generation has been implemented on the DSP Controller family thus saving the mechanical position sensor cost. Based on the non-fed phase back electromotive force measurement this software-computed rotor position is fu
LVDS Signal Quality: Jitter Measurements Using Eye Patterns Test Report #1
Texas InstrumentsLVDS Signal Quality: Jitter Measurements Using Eye Patterns Test Report #1
High-Efficiency Power Solution Using DC/DC Converter for the DM365 (Rev. A)
Texas InstrumentsTMS320DM365,TPS62260,TPS62290,TPS62231 High-Efficiency Power Solution Using DC/DC Converter for the DM365
Implementing a Line-Echo Canceller Using the Block Update and NLMS Algorithms on the TMS320C54x DSP
Texas InstrumentsThis document describes the implementation of a line echo canceller (LEC) on the TMS320C54x family of 16-bit fixed-point digital signal processors. Two different implementations of the adaptive transversal echo canceller filter are covered: block update and normalized least-mean square (also called stochastic gradient). Full assembler code is given for both examples.
TMS320C620x/C642x McBSP: UART (Rev. C)
Texas InstrumentsThis document describes how to use the multichannel buffered serial port (McBSP) in the Texas Instruments (TI) TMS320C6000™ (C6000™) digital signal processors (DSP) to interface to a universal asynchronous receiver/transmitter (UART). Descriptions of the hardware configuration and software routines necessary for proper functionality are included.
The McBSP is not capable of support
Power Supply Recommendations for DVD Receivers
Texas InstrumentsSelecting the optimal power supply for a non feed back digital amplifier can be challenging. Music is dynamic, so the power consumption is changing dramatically, from almost zero to maximum within a
General Guidelines: CDC7005 as a Clock Synthesizer and Jitter Cleaner (Rev. A)
Texas InstrumentsGeneral Guidelines: CDC7005 as a Clock Synthesizer and Jitter Cleaner
DN013 -- Programming output powers on CC1101 (Rev. A)
Texas InstrumentsDN013 -- Programming output powers on CC1101
CDCL6010 as a Frequency Synthesizer and Jitter Cleaner
Texas InstrumentsThis application report provides general guidelines for using the TI 1.8V LVDS/LVCMOS clock receiver CDCL6010 as a frequency synthesizer and/or jitter cleaner. This report reviews the basic device functionality and most efficient methods of use. The document also includes a detailed discussion of generating multiple frequencies with a common input frequency as well as a practical example of this
