ZC702 Board User Guide www.xilinx.com 34
UG850 (v1.7) March 27, 2019
Feature Descriptions
The data sheet can be obtained under NDA with Marvell. The Marvell site includes contact
information [Ref 20],
USB-to-UART Bridge
[Figure 1-2, callout 12]
The ZC702 board contains a Silicon Labs CP2103GM USB-to-UART bridge device (U36)
which allows a connection to a host computer with a USB port. The USB cable is supplied in
the ZC702 Evaluation Kit (Standard-A end to host computer, Type Mini-B end to ZC702
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 ZC702 board.
The CP2013GM TX and RX pins are wired to the UART_1 IP block within the XC7Z020 SoC PS
I/O Peripherals set. The XC7Z020 SoC supports the USB-to-UART bridge using two signal
pins: Transmit (TX) and Receive (RX).
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, TeraTerm or HyperTerm) that runs on
the host computer.
IMPORTANT: The VCP device drivers must be installed on the host PC prior to establishing
communications with the ZC702 board.
The USB Connector pin assignments and signal definitions between J17 and U36 are listed
in Table 1-15.
Table 1-15: USB Connector J17 Pin Assignments and Signal Definitions
USB Connector (J17)
Net Name Description
CP2103GM (U36)
Pin Name Pin Name
1 VBUS USB_UART_VBUS +5V VBUS Powered
7REGIN
8VBUS
2 D_N USB_UART_D_N Bidirectional differential serial data (N-side) 4 D –
3 D_P USB_UART_D_P Bidirectional differential serial data (P-side) 3 D +
5 GND USB_UART_GND Signal ground
2GND1
29 CNR_GND
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