DP83822HRHBR IC

DP83822HRHBR Description

The DP83822 is an ultra-rugged, low-power single-port 10/100 Mbps Ethernet PHY that is perfect for tough industrial settings. It offers all physical layer operations required to connect to an external fibre optic transceiver or transmit and receive data over common twisted-pair wires. The DP83822 also allows connecting to a MAC through a conventional MII, RMII, or RGMII interface.

The DP83822 takes advantage of built-in self-test, loopback capabilities, and integrated cable diagnostic tools. With its quick link-down detection and Auto-MDIX in forced modes, it supports a variety of industrial field buses. Through WoL, EEE, and other programmable energy-saving modes, the DP83822 offers a cutting-edge and reliable method for reducing power consumption.

The DP83822 is an alternative for the TLK105L, TLK105, TLK106, and TLK106L 10/100 Mbps Ethernet PHYs that are pin-to-pin upgradeable and have a wealth of features. 5.00 mm VQFN packaging with 32 pins is how the DP83822 is packaged.

DP83822HRHBR Features

• The ultra-rugged 10/100Mbs PHY has important characteristics that make it a dependable alternative for tough settings, including its capacity to endure ESD discharges up to +/- 8KV and EFT up to 4KV. Additionally, it supports 100BASE-FX, 100BASETX, and 10BASE-Te and is IEEE 802.3u compliant.
• With numerous accessible I/O voltages (3.3V, 2.5V, and 1.8V) and low power single supply options, the PHY offers flexible supply options.
• Additionally, it includes programmable energy saving modes, Wake-on-LAN (WoL) support with magic packet detection, Energy Efficient Ethernet (EEE) IEEE 802.3az, and other energy-saving features.
• Additionally, the PHY has diagnostic features like built-in self-test (BIST), loopback, and quick link-down detection.
• Last but not least, it provides auto-crossover in force modes and starts to detect frame for IEEE 1588-time stamp.

DP83822HRHBR Feature Description

Energy Efficient Ethernet

● EEE Overview

According to IEEE 802.3az, Energy Efficient Ethernet (EEE) is a capability built into Layer 1 (Physical Layer) and Layer 2 (Data Link Layer) that allows it to operate in Low Power Idle (LPI) mode. During times of low packet utilization, LPI mode conserves power. The protocol to enter and exit LPI mode without losing the link or corrupting packets is defined by EEE. The OSI model’s upper layers can see through LPI mode because the transition time into and out of it is so brief. Supported speeds for the DP83822 EEE include 10 and 100 Mbps. With a decreased transmit amplitude that is completely compatible with a 10BASE-T PHY, EEE works in 10BASE-Te mode.

● Reduced Media Independent Interface

Reduced Media Independent Interface, as defined in the RMII specification from the RMII consortium, is implemented in the DP83822. This interface’s goal is to offer an alternative to the IEEE 802.3u MII with fewer pins, as described in Clause 22. Architecturally speaking, On either side of the MII, the RMII standard offers an additional reconciliation layer, but it is not necessary.

RMII Master and RMII Slave are the 2 types of RMII operations available on the DP83822. The DP83822, when operating as an RMII Slave, utilizes a 50-MHz CMOS-level oscillator that is linked to the XI pin and shares a clock with the MAC. The DP83822 uses either a 25-MHz crystal linked to the XI and XO pins or a 25-MHz CMOS-level oscillator connected to the XI pin when operating as an RMII Master. The three DP83822 GPIOs are used to reference a 50-MHz output clock that is connected to the MAC.

● Reduced Gigabit Media Independent Interface (RGMII)

Additionally, the RGMII version 2.0-specified Reduced Gigabit Media Independent Interface (DP83822) is supported. The MAC and PHY connection uses a smaller number of pins thanks to RGMII. The control signals are multiplexed to achieve this purpose. The transmit and receive routes sample the control signal pin on both the rising and falling edges of the clock. Both RX_CLK and TX_CLK run at 2.5 MHz for 10-Mbps operation. Both RX_CLK and TX_CLK run at 25 MHz for 100-Mbps operation.

● 2 Serial Management Interface

For configuration and status information, the DP83822 internal register area is accessible via the Serial Management Interface. IEEE 802.3 clauses 22 and 45 are compatible with the SMI. The implemented register set includes all of the registers needed to comply with IEEE 802.3 as well as a few more that increase the DP83822’s visibility and controllability. Management input or output data pin and management clock (MDC) are also components of the SMI. MDC can operate at a maximum clock rate of 25 MHz and is sourced by the external management entity known as Station (STA). The external management entity may disable MDC while the bus is not in use because it is not intended to be continuous.

The PHY and the external management entity both source MDIO. The rising edge of the MDC is used to latch the data on the MDIO pin. A pullup resistor (2.2 K) is needed for the MDIO pin in order to pull it high during IDLE and turnaround. A single SMI bus can accommodate up to 32 PHYs. Using a 5-bit address, the PHYs are separated. The DP83822 latches the PHY_AD[4:0] configuration pins on power-up or hardware reset to determine its address.

The management entity is not permitted to initiate a SMI transaction during the initial power-up or hardware reset cycle. The SMI bus must be idle for at least one MDC cycle after reset is measured in order for the operation to continue to be valid. Normal MDIO transactions use the management-frame reg_addr field as the registered address, giving them direct access to 32 16-bit registers, including vendor-specific and IEEE 802.3-defined registers. Reading and writing are both possible in the data field.

A pattern indicates the Start code. By using this pattern, the MDIO line is guaranteed to change from its initial idle state. The term “turnaround” refers to the insertion of an empty bit between the Register Address field and the Data field. For the first bit of Turnaround, In order to prevent congestion during a read transaction, no device is permitted to drive the MDIO signal actively.

Following a zero for the second bit of turnaround, the addressed DP83822 drives the MDIO with the necessary data. MDIO Turnaround is unnecessary for writing transactions because the station-management entity writes data to the designated DP83822. The management entity fills out the turnaround time by inputting.

Conclusion

The DP83822 is a robust and reliable Ethernet PHY that is ideal for demanding industrial situations, in conclusion. It is a fantastic option for individuals looking for efficiency and compatibility due to its cutting-edge features like Energy Efficient Ethernet and Reduced Gigabit Media Independent Interface. ICRFQ, a well-known Chinese distributor of electronic components, offers the DP83822. Our staff is committed to giving you the highest quality goods and services so you can finish your project on schedule and within your allocated budget. Don’t allow sourcing issues to impede your development; get in touch with us right now to order the DP83822 and any other parts you require. Let us assist you in realizing your objectives and finishing your project.

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