USB-to-UART Bridge, Vbus, Ground | Xilinx ML605 guide

Detailed Description

12. USB-to-UART Bridge

The ML605 contains a Silicon Labs CP2103GM USB-to-UART bridge device (U34) which allows connection to a host computer with a USB cable. The USB cable is supplied in this evaluation kit (Type A end to host computer, Type Mini-B end to ML605 connector J21).

Table 1-14details the ML605 J21 pinout.

Xilinx UART IP is expected to be implemented in the FPGA fabric (for instance, Xilinx XPS UART Lite. 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 which permit the CP2103GM USB-to-UART bridge to appear as a COM port to host computer communications application software (for example, HyperTerm or TeraTerm). The VCP device driver must be installed on the host PC prior to establishing communications with the ML605. Refer to the evaluation kit Getting Started Guide for driver installation instructions.

Table 1-14:USB Type B Pin Assignments and Signal Definitions

	USB Connector	Signal Name	Description
	Pin	Signal Name	Description
	Pin

	1	VBUS	+5V from host system (not used)

	2	USB_DATA_N	Bidirectional differential serial data (N-side)

	3	USB_DATA_P	Bidirectional differential serial data (P-side)

	4	GROUND	Signal ground

Table 1-15:USB-to-UART Connections

	U1 FPGA Pin	UART function	Schematic Net	U34 CP2103GM	UART Function
	U1 FPGA Pin	in FPGA	Name	Pin	in CP2103GM
		in FPGA	Name	Pin	in CP2103GM

	T24	RTS, output	USB_1_CTS	22	CTS, input

	T23	CTS, input	USB_1_RTS	23	RTS, output

	J25	TX, data out	USB_1_RX	24	RXD, data in

	J24	RX, data in	USB_1_TX	25	TXD, data out

References

Refer to the Silicon Labs website for technical information on the CP2103GM and the VCP drivers.

In addition, see some of the Xilinx UART IP specifications at:

•http://www.xilinx.com/support/documentation/ip_documentation/xps_uartlite.pdf

•http://www.xilinx.com/support/documentation/ip_documentation/xps_uart16550.pdf

ML605 Hardware User Guide	www.xilinx.com	39
UG534 (v1.2.1) January 21, 2010

Image 39

Xilinx ML605 manual USB-to-UART Bridge, Vbus, Ground

Contents

UG534 v1.2.1 January 21, 2010 optional ML605 Hardware User Guide Date Version Revision Revision History Table of Contents ML605 Hardware User Guide About This Guide Preface About This Guide Additional Support Resources Additional Information ML605 Evaluation Board IIC Eeprom 1 KB FeaturesML605 Evaluation Board SMA Fpga Init Fpga Done Overview 1ML605 High-Level Block Diagram Block Diagram DDR3 Sodimm ML605 FeaturesFeature Detailed Description ML605 Evaluation Board ML605 Features Cont’d SgmiiWDW6TP Virtex-6 XC6VLX240T-1FFG1156 Fpga Configuration 3Voltage Rails U1 Fpga Bank 2Virtex-6 Fpga Configuration Modes M20Voltage Rails Cclk Direction 4DDR3 Sodimm Connections MB DDR3 Memory SodimmDetailed Description 3Voltage Rails Cont’d U1 Fpga Bank VCC1V5FPGA DDR3A9 ML605 Evaluation Board 4DDR3 Sodimm Connections Cont’d DDR3D30 DQ30 DDR3DM0 See the Micron Technology, Inc. for more information Ref MB Linear BPI Flash Mb Platform Flash XL ML605 Flash Boot Options FLASHD3 DQ3 FLASHD0 DQ0FLASHD1 DQ1 FLASHD2 DQ2 Fpga Design Considerations for the Configuration Flash System ACE CF and CompactFlash Connector 6System ACE CF Connections U1 Fpga Pin Schematic Net Name USB Jtag Clock Generation Oscillator DifferentialOscillator Socket Single-Ended 7ML605 Oscillator Socket Pin 1 Location Identifiers 8ML605 Oscillator Pin 1 Location Identifiers SMA Connectors Differential SMA Pin SmarefclknSmarefclkp ICS Multi-Gigabit Transceivers GTX MGTs 12PCIe Lane Size Select Jumper J42 PCI Express Endpoint Connectivity 8PCIe Edge Connector Connections GTXE1X0Y6 AA3 PCIERX7PAA4 PCIERX7N PCIE100MMGT0P SFP Module Connector Bit2 Bit1 Bit0 11PHY Default Interface Mode Jumper Settings J66 J67 J6812Board Connections for PHY Configuration Pins 11 /100/1000 Tri-Speed Ethernet PHY U80 M88E1111 12Board Connections for PHY Configuration Pins Cont’dSgmii GTX Transceiver Clock Generation 13Ethernet PHYConnections U1 Fpga Pin RXD5 PHYRXD4RXD4 PHYRXD5 USB-to-UART Bridge VbusGround USB Controller 16USB Controller ConnectionsU81 USB Controller DVI Codec 17DVI Controller ConnectionsU38 Chrontel CH7301C IIC Bus 14IIC Bus Topology Kb NV Memory Iicsdamain SDAIicsclmain SCL Status LEDs Designator Signal Name Color Label Description 16Ethernet PHY Status LEDs Ethernet PHY Status LEDs Fpgainitb User I/OFpga Init and Done LEDs Controlled LED User LEDs 18User LEDs and Gpio Connector, Directional LEDs User Pushbutton Switches Detailed Description 21User LED Connections Fpga U1 PinGpio J62 Pin Controlled LED Switch Pin User DIP Switch User SMA Gpio UsersmagpionUsersmagpiop J41 Pin LCD Display 16 Character x 2 Lines Power On/Off Slide Switch SW2 Switches Fpgaprogb Pushbutton SW4 Active-Low Sysaceresetb Pushbutton SW3 Active-Low 26System ACE CF CompactFlash Image Select DIP Switch S1 System ACE CF CompactFlash Image Select DIP Switch S1 M20 Bus Width 26ML605 Configuration Modes Master BPI Vita 57.1 FMC HPC Connector HPC Pin 28VITA 57.1 FMC HPC Connections 28VITA 57.1 FMC HPC Connections Cont’d FMCHPCHB08N FMCHPCHB09NFMCHPCHB08P FMCHPCHB13P Detailed Description 28VITA 57.1 FMC HPC Connections Cont’d VREFBM2C VadjVIOBM2C Vadj VREFAM2C Vadj Vita 57.1 FMC LPC Connector LPC Pin 30VITA 57.1 FMC LPC Connections Power Management AC Adapter and Input Power Jack/SwitchDetailed Description 30VITA 57.1 FMC LPC Connections Cont’d 28ML605 Onboard Power Regulators Onboard Power Regulation UCD7230RGWR UCD9240PFCVccintfpga Vccaux 29System Monitor External Reference System Monitor System Monitor Header J35 12V Supply Monitor Fan Controller Bank Configuration Options Configuration Options ML605 Evaluation Board Function/Type Default Table A-1Default Switch Settings Gmii Vita 57.1 FMC LPC J63 and HPC J64 Connector Pinout Figure B-2FMC HPC Connector Pinout ML605 Master UCF NET DDR3D9 Appendix C ML605 Master UCF NET DDR3DQS0P NET FLASHA21 ML605 Hardware User Guide UG534 v1.2.1 January 21 NET FMCHPCHB03P NET FMCHPCLA16N NET FMCLPCPRSNTM2CL NET Iicsdadvi NET PCIERX2N NET Pmbusdatals NET Sfplos NET Sfprxn NET Sfprxp NET USBD6LS References Appendix D References