RTL8153 Ver la hoja de datos (PDF) - Realtek Semiconductor

Número de pieza

componentes Descripción

Lista de partido

RTL8153

INTEGRATED 10/100/1000M ETHERNET CONTROLLER FOR USB APPLICATIONS

Realtek Semiconductor 

RTL8153

Datasheet

6. Functional Description

6.1. USB Interface

The SIE (Serial Interface Engine) employs a robust hardwired USB protocol implementation so that the

entire USB interface operation can be done without firmware intervention. For all three types of End

Points (Bulk-IN, Bulk-OUT, and Interrupt-IN), appropriate responses and handshake signals are

generated by the SIE. The SIE analog transceiver complies fully with driver and receiver characteristics

defined in USB Specification Rev. 3.0.

6.1.1. USB Configurations

The RTL8153 supports two networking configurations; ECM (Ethernet Control Model) configuration and

in-house configuration. The ECM configuration complies with CDC-ECM, and is a general Ethernet

networking model that enables network communication without installing additional vendor specific

drivers. The in-house configuration requires a vendor specific driver to support enhanced features and

optimized performance.

6.1.2. Endpoint 0

All USB devices support a common access mechanism for accessing information through this control

pipe. Associated with the control pipe at endpoint 0 is the information required to completely describe the

USB device. This pipe also provides the register read and write to the RTL8153.

6.1.3. Endpoint 1 Bulk-IN

The maximum Bulk-IN packet size is 1024 bytes. Each Ethernet packet is transferred to the HOST by this

Endpoint. If the Ethernet packet is larger than 1024 bytes, the RTL8153 splits the Ethernet packet into

multiples of 1024 bytes. The HOST treats USB packets that are less than 1024 bytes or are equal to zero

as End of Ethernet packets.

6.1.4. Endpoint 2 Bulk-OUT

The HOST sends the USB packet to Ethernet. If the Ethernet packet is larger than 1024 bytes, the Host

will send the Ethernet packet in multiples of 1024 bytes. A USB packet that is less than 1024 bytes or is

equal to zero is treated as an End of Ethernet packet.

The Ethernet packet (containing multiple USB packets) will be queued in the TX FIFO and transmitted

when possible. If the Ethernet packet is transmitted without error, the TX FIFO space that was occupied

by the transmitted Ethernet packet will be released. If the TX FIFO is full, the RTL8153 will respond

with a NRDY when the host tries to Bulk-OUT more USB packets.

It is possible to have multiple Ethernet packets in the TX FIFO simultaneously. If an Ethernet packet is to

be transmitted but experiences collisions more than 16 times (default), this is called a transmit abort and

the packet will be skipped for transmission by the RTL8153.

6.1.5. Endpoint 3 Interrupt-IN

The Interrupt Endpoint (EP3) can be used to poll the current ALDPS state, EEE capability, TX/RX flow

control enable, Connection Speed, Duplex mode, and link status of the RTL8153.

Integrated 10/100/1000M Ethernet Controller for USB Applications

8

Track ID: JATR-8275-15 Rev. 1.1

Share Link: