www.ti.com

 

 

 

Ethernet Media Access Controller (EMAC) Registers

 

Table 68. MAC Control Register (MACCONTROL) Field Descriptions (continued)

Bit

Field

Value

Description

5

GMIIEN

 

GMII enable bit.

 

 

0

GMII RX and TX are held in reset.

 

 

1

GMII RX and TX are enabled for receive and transmit.

4

TXFLOWEN

 

Transmit flow control enable bit. This bit determines if incoming pause frames are acted upon

 

 

 

in full-duplex mode. Incoming pause frames are not acted upon in half-duplex mode,

 

 

 

regardless of the TXFLOWEN bit setting. The RXMBPENABLE bits determine whether or not

 

 

 

received pause frames are transferred to memory.

 

 

0

Transmit flow control is disabled. Full-duplex mode: incoming pause frames are not acted

 

 

 

upon.

 

 

1

Transmit flow control is enabled. Full-duplex mode: incoming pause frames are acted upon.

3

RXBUFFERFLOWEN

 

Receive buffer flow control enable bit.

 

 

0

Receive flow control is disabled. Half-duplex mode: no flow control generated collisions are

 

 

 

sent. Full-duplex mode: no outgoing pause frames are sent.

 

 

1

Receive flow control is enabled. Half-duplex mode: collisions are initiated when receive buffer

 

 

 

flow control is triggered. Full-duplex mode: outgoing pause frames are sent when receive flow

 

 

 

control is triggered.

2

Reserved

0

Reserved

1

LOOPBACK

 

Loopback mode. The loopback mode forces internal full-duplex mode regardless of the

 

 

 

FULLDUPLEX bit setting. The loopback bit should be changed only when GMIIEN bit is

 

 

 

deasserted.

 

 

0

Loopback mode is disabled.

 

 

1

Loopback mode is enabled.

0

FULLDUPLEX

 

Full-duplex mode. The gigabit mode (GIG = 1) forces full-duplex mode regardless of the

 

 

 

FULLDUPLEX bit setting

 

 

0

Half-duplex mode is enabled.

 

 

1

Full-duplex mode is enabled.

SPRUEQ6–December 2007

Ethernet Media Access Controller (EMAC)/Management Data Input/Output (MDIO)

111

Submit Documentation Feedback

 

 

Page 111
Image 111
Texas Instruments TMS320DM646x manual MAC Control Register Maccontrol Field Descriptions

TMS320DM646x specifications

The Texas Instruments TMS320DM646x series is a powerful family of digital media processors designed to handle high-performance applications in video, imaging, and audio processing. These devices leverage advanced technologies to deliver efficient processing capabilities for a variety of embedded systems, making them ideal for multimedia solutions.

At the core of the TMS320DM646x is the versatile DSP architecture, which optimizes performance for digital signal processing tasks. This architecture allows for real-time processing, enabling the devices to handle complex algorithms necessary for image and video compression, thereby meeting the rigorous demands of modern multimedia applications.

One of the standout features of the TMS320DM646x series is its dual-core architecture. This consists of a Digital Signal Processor (DSP) alongside an ARM-based application processor. The DSP is predominantly employed for critical processing tasks, allowing it to execute high-throughput data streams efficiently, while the ARM processor manages control tasks and user interfaces. This division of labor enhances overall system performance and responsiveness.

The series supports a wide range of video formats and technologies, including HD video encoding and decoding, which accommodates HD resolution content essential for today’s multimedia applications. Furthermore, the TMS320DM646x integrates hardware accelerators for video compression standards such as H.264 and MPEG-4, which significantly reduce the processing burden on the CPU, resulting in lower power consumption and higher efficiency.

Networking capabilities are another significant feature of the TMS320DM646x. With support for Ethernet, the device can handle streaming media applications and connectivity, facilitating the transmission of high-quality audio and video over the internet. This connectivity is crucial for developing robust IPTV and streaming solutions.

Power management is a primary focus in the design of the TMS320DM646x series. The processors are built to operate efficiently with minimal power consumption, making them suitable for portable and battery-operated devices. The low power characteristics do not compromise performance, enabling high computational capabilities while maintaining energy efficiency.

Overall, the Texas Instruments TMS320DM646x series offers an exceptional combination of processing power, advanced multimedia capabilities, and energy efficiency. It optimally supports a wide array of applications, from video processing and image analysis to audio encoding. This comprehensive feature set, along with its robust architecture, positions the TMS320DM646x as a leading choice for developers in the digital media space.