Ethernet Phy User Leds; Usb-To-Uart Bridge - Xilinx AC701 User Manual

Ethernet PHY User LEDs

[Figure
The three Ethernet PHY user LEDs shown in
P4. The ON/OFF state for each LED is software dependent and has no specific meaning at Ethernet
PHY power-on.
X-Ref Target - Figure 1-24
VCC3V3
PHY_LED0
GND
See the Marvell 88E1116R Alaska Gigabit Ethernet transceiver data sheet for details concerning the
use of the Ethernet PHY user LEDs. They are referred to in the data sheet as LED0, LED1, and
LED2. The product brief and other product information for the Marvell 88E1116R Alaska Gigabit
ethernet transceiver is available at
The Marvell 88E1116R PHY data sheet can be obtained under NDA with Marvell

USB-to-UART Bridge

[Figure
The AC701 board contains a Silicon Labs CP2103GM USB-to-UART bridge device (U44) which
allows a connection to a host computer with a USB port. The USB cable is supplied in the evaluation
kit (standard-A plug to host computer, mini-B plug to AC701 board connector J17). The
CP2103GM is powered by the USB 5V provided by the host PC when the USB cable is plugged into
the USB port on the AC701 board.
Xilinx UART IP is expected to be implemented in the FPGA logic. The FPGA supports the
USB-to-UART bridge using four signal pins: Transmit (TX), Receive (RX), Request to Send (RTS),
and Clear to Send (CTS).
Silicon Labs provides royalty-free Virtual COM Port (VCP) drivers for the host computer. These
drivers permit the CP2103GM USB-to-UART bridge to appear as a COM port to communications
application software (for example, Tera Term or HyperTerm) that runs on the host computer. The
VCP device drivers must be installed on the host PC prior to establishing communications with the
AC701 board.
AC701 Evaluation Board
UG952 (v1.4) August 6, 2019
1-2, callout 20]
VCC3V3
R281
261Ω
1/10W
DS13
LED-GRN-SMT
Q3
NDS331N
PHY_LED1
460 mW
GND
Figure 1-24: Ethernet PHY User LEDs
[Ref
1-2, callout 16]
www.xilinx.com
Figure 1-24 are located near the RJ45 Ethernet jack
VCC3V3
R280
261Ω
1/10W
DS12
LED-GRN-SMT
Q3
NDS331N
PHY_LED2
460 mW
GND
18].
Feature Descriptions
R279
261Ω
1/10W
DS11
LED-GRN-SMT
Q3
NDS331N
460 mW
UG952_c1_22_100312
[Ref 18].
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