Cypress Semiconductor EZ-USB GX3 CY4701, Reference Design Manual, Page: 17 / 23

Hardware
CY4701 EZ-
USB® GX3™ Reference Design Guide Doc. No. 001-97892 Rev. **
17
4.2 Theory of Operation
This section describes the CY4701 RDK board block diagram shown in Figure 4-2 .
Figure 4-2. Hardware Block Diagram
USB 3.0
Plug
EZ-USB
GX3
(CYUSB3610)
Regulator
RJ45
connector
with
Magnetics
Serial
EEPROM
Activity LEDs
D+/-, SSTX+/-, SSRX+/- MDI+/-
3.3 V
1.2 V
VBUS
1V2 3V3
SCK
SDA
GND
VBUS
The CY4701 RDK dongle features the CYUSB3610 GX3 SuperSpeed USB to Gigabit Ethernet Bridge Controller, which
does not require any firmware development. You can modify the USB and Ethernet parameters of the controller using the
Cypress GX3 EEPROM Programming Tool.
The CY4701 RDK dongle is powered from the USB. This input voltage is regulated with an LDO regulator to 3.3 V and
1.8 V connected to the GX3 bridge controller. You can connect to a network using an Ethernet cable to the RJ45 connector
of the CY4701 RDK.
The CY4701 RDK includes a serial EEPROM connected to the GX3 bridge controller. The configurable parameter values
are stored in EEPROM so that while booting, the GX3 loads the parameter values from the EEPROM. If the EEPROM is
blank or has invalid data, the GX3 loads the default parameters stored in its internal memory.
The CY4701 RDK also includes a USB 3.0 activity LED and an Ethernet activity LED. Refer to the LEDs section for an
explanation of their functions.
4.3 Functional Description
The GX3 RDK enumerates as a standard network adapter on the PC, enabling existing software applications to be reused,
and accelerates time to market. For more information, refer to the
GX3 web page and the GX3 datasheet.
4.3.1 GX3 Features

USB 3.0 certified, SuperSpeed (5 Gbps); also supports USB High Speed and Full Speed

Gigabit Ethernet PHY

Supports Energy Efficient Ethernet (EEE)

Supports WLAN (Wake on LAN)

Supports throughput up to 950 Mbps

Supports Jumbo frames up to 4K for more throughput
4.3.2 Power Supply System
The CY4701 RDK dongle is designed to operate in the USB bus-powered mode. The onboard voltage regulator provides
the 3.3 V and 1.2 V required for the bridge controller and the serial EEPROM.