ADDR = 0x182: Transmit Control/Type_L Byte

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit name TX_CNT_TYPE_L[7:0]

R/W R/W

Value 0x03 after

reset

Bits 7-0: TX_CNT_TYPE_L[7:0] specifies the Control Byte for LAPS mode and the LSB of the TYPE field for GFP mode, which is the Payload Identifier. This byte will be sent out in the encapsulated LAPS/GFP frame from the Ethernet side to the SONET/SDH side if the TX_CNT_INH or the TX_TYPE_INH bit is not set, respectively. The default value is assigned to 0x03 for LAPS since LAPS is the default mode. For GFP mode, this register must be programmed to 0x01 for Ethernet.

ADDR = 0x183: Transmit Rate Adaptation/Type_H Byte

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Bit name TX_RA_TYPE_H[7:0]

R/W R/W

Value 0xDD after

reset

Bits 7-0: TX_RA_TYPE_H[7:0] specifies the Rate Adaptation Byte for LAPS mode and the MSB of the TYPE field for GFP mode, which consists of the Extension Header Identification, Payload FCS Indicator and Payload Type Identifier. In LAPS mode, this byte is inserted into the TX Payload Data sent from the Ethernet side to the SONET/SDH side if the TX_RA_INH bit is not set and an underrun occurs in the TX FIFO. Rate Adaptation is used to accommodate the rate difference between the faster SONET/SDH clock and the slower MII clock. In GFP mode, this byte is inserted into the Type Header sent from the Ethernet side to the SONET/SDH side if the TX_TYPE_INH bit is not set, and should be set to 0x10 for Null Headers with FCS.

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Agilent Technologies HDMP-3001 manual Value 0x03 after Reset, Value 0xDD after Reset

HDMP-3001 specifications

Agilent Technologies, a prominent name in electronics and measurement technology, offers a wide range of products that cater to various industries. Among its notable offerings is the HDMP-3001, a high-speed, serial data transceiver designed to facilitate robust communications in electronic systems. The HDMP-3001 stands out with its ability to handle high bandwidths, making it particularly suited for applications requiring rapid data transfer, such as telecommunications, computer networking, and high-performance computing.

One of the main features of the HDMP-3001 is its advanced signaling technology. By employing differential signaling, the transceiver minimizes electromagnetic interference and enhances signal integrity. This is crucial in environments with multiple electronic devices operating simultaneously, as it ensures data is transmitted clearly and without degradation.

The HDMP-3001 operates at a maximum data rate of 1 Gbps, allowing for efficient data transfer over short distances. This capability is coupled with a flexible architecture that enables users to configure the transceiver for various applications. The device supports both point-to-point and point-to-multipoint configurations, giving engineers the versatility they need in designing communication links.

Moreover, the HDMP-3001 features on-chip clock recovery functionality, which simplifies system design by reducing the number of external components needed. This built-in feature allows the transceiver to maintain synchronization even as data rates increase, further enhancing performance.

The low power consumption characteristic of the HDMP-3001 is another notable advantage. This makes it an attractive choice for battery-operated devices and systems where power efficiency is critical. The transceiver’s design ensures optimal performance while minimizing heat generation and power draw, enabling longer operational lifetimes.

In terms of physical characteristics, the HDMP-3001 comes in a compact, surface-mount package, allowing for easier integration into various circuit board designs. The small form factor, combined with its innovative technology, makes it a popular choice among engineers seeking to improve data transmission reliability without compromising on space or power constraints.

Overall, Agilent Technologies' HDMP-3001 is a formidable solution for high-speed serial data transmission, characterized by its robust performance, low power consumption, and versatile configuration options. With these features, it continues to be an essential component in the evolving landscape of electronic communications.