TMS320DM355

Digital Media System-on-Chip (DMSoC)

www.ti.com

SPRS463A –SEPTEMBER 2007 –REVISED SEPTEMBER 2007

 

 

Video￿DAC￿and￿Buffer

 

 

VREF

IBIAS

IOUT

VFB

TVOUT

 

 

 

 

TV￿monitor

C

RBIAS

 

 

 

BG

2550 Ω

 

 

 

0.1 F

 

 

 

 

 

Rfb = 1000 Ω

Rout =￿￿1070 Ω

 

PRODUCT

DAC￿Digital￿Input

DIN￿<9:0>

MSB

LSB

Video￿Buffer￿Output￿Voltage

TVOUT￿[V]

VOH(VIDBUF)

VOL(VIDBUF)

0

PREVIEW

A.Place capacitors and resistors as close as possible to the DM355.

B.You must use the circuit shown in this diagram. Also you must configure the VDAC_CONFIG register in the System Control module as follows: TRESB4R4 = 0x3, TRESB4R2 = 0x8, TRESB4R1 = 0x8, TRIMBITS = 0x34, PWD_BGZ = 1 (power up VREF), SPEED = 1 (faster), TVINT = don'tcare, PWD_VBUFZ = 1 (power up video buffer), VREFSET = don'tcare, ACCUP_EN = 0 (no A/C coupling), DINV = 1 (invert). See the TMS320DM355 ARM Subsystem Reference Guide and the TMS320DM355 DMSoC Video Processing Back End (VPBE) User'sGuide for more information on the VDAC_CONFIG register and Video Buffer.

C.For proper TVOUT voltage, you must connect the pin TVOUT directly to the TV. No A/C coupling capacitor or termination resistor is necessary on your DM355 board. Also, it is assumed that the TV has no internal A/C coupling capacitor but does have an internal termination resistor, as shown in this diagram. TVOUT voltage will range from VOL(VIDBUF) to VOH(VIDBUF). See Section 4.3 for the voltage specifications.

Figure 5-32. DAC With Buffer Circuit

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Peripheral Information and Electrical Specifications

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Texas Instruments TMS320DM355 warranty DAC With Buffer Circuit, Tvoutv

TMS320DM355 specifications

The Texas Instruments TMS320DM355 is a versatile digital signal processor designed to support a wide array of multimedia applications, specifically in the realms of digital video and audio processing. As part of the TMS320 family of digital signal processors, the DM355 brings a blend of computational power, energy efficiency, and integrated features that make it highly effective for tasks such as video encoding, decoding, and general signal processing.

One of the standout features of the DM355 is its advanced DaVinci architecture, which is specifically optimized for multimedia tasks. This architecture integrates both DSP and application processing functionalities. The dual-core architecture includes a high-performance DSP core that specializes in real-time signal processing alongside an ARM926EJ-S RISC microprocessor, facilitating the execution of complex algorithms and control tasks.

The DM355 offers robust multimedia processing capabilities with support for several video formats, including MPEG-2, MPEG-4, H.264, and JPEG. This enables developers to create powerful video applications for a variety of devices, from industrial systems to consumer electronics. Its processing capabilities extend to audio processing, allowing it to efficiently handle audio codecs and enhance audio quality in applications ranging from IP cameras to set-top boxes.

In terms of connectivity, the TMS320DM355 supports various interfaces including USB 2.0, Ethernet, and various serial interfaces like UART, SPI, and I2C. This wide range of connectivity options ensures that the DM355 can easily interface with different peripherals and network components, making it a suitable choice for networked applications.

Energy efficiency is another significant advantage of the DM355. With a focus on low power consumption, the device is designed to operate effectively in battery-powered and heat-sensitive environments. Its low thermal design power allows for extended operational life and reduced thermal management requirements, making it ideal for portable devices.

Furthermore, the DM355 is supported by a comprehensive software development framework, including the TI Code Composer Studio and a range of middleware tools, which streamline application development and speed up time to market. Its rich ecosystem enhances its usability across different applications, ensuring that developers can leverage the full potential of the hardware.

In summary, the Texas Instruments TMS320DM355 stands out as a powerful yet cost-effective DSP solution, combining advanced multimedia processing capabilities, robust connectivity options, and energy efficiency. Its unique architecture and extensive support resources make it a preferred choice for developers seeking to create innovative multimedia solutions.