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Product introduction

The 88E1111-B2-RCJ1C000 is a Gigabit Ethernet transceiver chip manufactured by Marvell ‌. It supports multiple interfaces and protocols, including GMII, RGMII, MII, SGMII, TBI, and RTBI, and can be connected directly to the MAC/Switch port ‌. The device is used as a physical layer device for Ethernet 1000BASE-T, 100BASE-TX, and 10BASE-T applications. It is manufactured in a standard digital CMOS process and contains all the active circuits needed to enable the physical layer functionality to send and receive data over standard CAT 5 unshielded twisted pair wires.

Key Features

• Compliant with 10/100/1000BASE-T IEEE 802.3 standard

• Support for GMII, TBI, Pin-reduction GMII (RGMII), pin-Reduction TBI (RTBI), and serial GMII (SGMII) interfaces

• Integrated 1.25GHz SERDES for 1000BASE-X fiber applications

• Four RGMII timing modes

• Energy Detect and Energy Detect+ Low power modes

• Three loopback modes for diagnostics

• "Downshift" mode for two-pair cable installation

Fully integrated digital adaptive equalizer, echo canceller and crosstalk canceller

• Advanced digital baseline drift correction

• Automatic MDI/MDIX crossover at all operating speeds

• Automatic polarity correction

• Automatic negotiation according to IEEE 802.3u standard

• Software programmable LED mode, including LED testing

• Automatic detection of fiber or copper cable operation

• Support IEEE 1149.1 JTAG

• Two-wire Serial Interface (TWSI) and MDC/MDIO

• CRC checker, packet counter

• Packet generation

• Virtual Cable Tester (VCT)

• Automatic calibration of MAC interface output

• Only two power supplies are required: 2.5V and 1.0V (1.2V optional for 1.0V power supply)

• I/O can withstand 3.3V voltage

• Low power Pave = 0.75W

• 128 PQFP package

Application scenario

The 88E1111 chip has three main application scenarios:

1. Copper wire application ‌ : used for RJ-45 connection.

2, optical fiber application ‌ : used for optical fiber transmission.

3, RGMII/GMII to SGMII MAC conversion ‌ : suitable for three-speed SFP conversion ‌,