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Ethernet Media Access Controller (EMAC) Registers

5.44 MAC Address High Bytes Register (MACADDRHI)

The MAC address high bytes register (MACADDRHI) is shown in Figure 84 and described in Table 83.

Figure 84. MAC Address High Bytes Register (MACADDRHI)

31

24

23

16

 

MACADDR2

 

MACADDR3

 

R/W-0

 

R/W-0

15

8

7

0

 

MACADDR4

 

MACADDR5

 

R/W-0

 

R/W-0

LEGEND: R/W = Read/Write; -n= value after reset

Table 83. MAC Address High Bytes Register (MACADDRHI) Field Descriptions

Bit

Field

Value

Description

 

31-24

MACADDR2

0-FFh

MAC source address bits 23-16 (byte 2)

23-16

MACADDR3

0-FFh

MAC source address bits 31-24

(byte 3)

15-8

MACADDR4

0-FFh

MAC source address bits 39-32

(byte 4)

7-0

MACADDR5

0-FFh

MAC source address bits 47-40

(byte 5). Bit 40 is the group bit. It is forced to 0 and read as 0.

 

 

 

Therefore, only unicast addresses are represented in the address table.

5.45 MAC Index Register (MACINDEX)

The MAC index register (MACINDEX) is shown in Figure 85 and described in Table 84.

Figure 85. MAC Index Register (MACINDEX)

31

 

 

16

 

Reserved

 

 

 

R-0

 

 

15

3

2

0

Reserved

 

 

MACINDEX

R-0

 

 

R/W-0

LEGEND: R = Read only; R/W = Read/Write; -n= value after reset

Table 84. MAC Index Register (MACINDEX) Field Descriptions

Bit

Field

Value

Description

31-3

Reserved

0

Reserved

2-0

MACINDEX

0-7h

MAC address index. The host must write the index into the RX ADDR RAM in the MACINDEX field,

 

 

 

followed by the upper 32-bits of address, followed by the lower 16-bits of address (with control bits). The

 

 

 

53-bit indexed RAM location is written when the low location is written. All 32 address RAM locations

 

 

 

must be initialized prior to enabling packet reception.

SPRUEQ6–December 2007

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

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Texas Instruments TMS320DM646x manual MAC Address High Bytes Register Macaddrhi, MAC Index Register Macindex, MACADDR2

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.

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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.