Platform Cable USB
1 / 20Pages

Product Specification Platform Cable USB has these features: Configures all Xilinx® devices Supported on Windows and Red Hat Enterprise Linux All Virtex® FPGA families Automatically senses and adapts to target I/O voltage All Spartan® FPGA families Interfaces to devices operating at 5V (TTL), 3.3V (LVCMOS), 2.5V, 1.8V, and 1.5V CoolRunner™ XPLA3 / CoolRunner-II CPLDs Platform Flash XCF00S/XCF00P/XL PROMs Intended for development — not recommended for production programming Pb-free (RoHS-compliant) Programs serial peripheral interface (SPI) flash PROMs Platform Cable USB Description Platform Cable USB (Figure 1) is a high-performance download cable attaching to user hardware for the purpose of programming or configuring any of the following Xilinx devices: • Platform Cable USB attaches to the USB port on a desktop or laptop PC with an off-the-shelf Hi-Speed USB A-B cable. It derives all operating power from the hub port controller. No external power supply is required. A sustained slaveserial FPGA configuration transfer rate of 24 Mb/s is possible in a Hi-Speed USB environment. Actual transfer rates can vary if bandwidth of the hub is being shared with other USB peripheral devices. the Platform Flash XL configuration and storage device. Target clock speeds are selectable from 750 kHz to 24 MHz. Platform Cable USB attaches to target systems using a 14-conductor ribbon cable designed for high-bandwidth data transfers. An optional adapter that allows attachment of a flying lead set is included for backward compatibility with target systems that do not use the ribbon cable connector. Note: The next generation, Platform Cable USB II, is now available. Please refer to the DS593, Platform Cable USB II, for details. X-Ref Target - Figure 1 Device configuration and programming operations using Platform Cable USB are supported by iMPACT download software using Boundary-Scan (IEEE 1149.1 / IEEE 1532), slave-serial mode, or serial peripheral interface (SPI). Platform Cable USB supports indirect (via an FPGA IEEE 1149.1 [JTAG] port) programming of select flash memories including Figure 1: Xilinx Platform Cable USB © 2004–2008 Xilinx, Inc. All rights reserved. XILINX, the Xilinx logo, Virtex, Spartan, ISE and other designated brands included herein are trademarks of Xilinx in the United States and other countries. All other trademarks are the property of their respective owners.

Physical Description The Platform Cable USB electronics are housed in a recyclable, fire-retardant plastic case (Figure 2). An internal EMI shield attenuates internally generated emissions and protects against susceptibility to radiated emissions. X-Ref Target - Figure 2 Top View HI-SPEED CERTIFIED JTAG or Serial INIT ---------TDI DIN TDO DONE TCK CCLK TMS PROG Vref Vref Note: The DLC9G and legacy DLC9LP cable models draw less than 100 mA from the host USB port. The legacy DLC9 cable model requires 230 mA to operate in USB 2.0 Hi-Speed mode or 150 mA to operate in USB 2.0/1.1 full-speed...

During a CPLD update, the Status LED illuminates red, and a progress bar indicates communication activity (see Figure 4). CPLD updates should never be interrupted. When an update is complete, the Status LED returns to either amber or green, and the cable is ready for normal operation. X-Ref Target - Figure 4 X-Ref Target - Figure 3 Figure 4: CPLD Update Progress Bar DS300_03_112504 Figure 3: CPLD Update Notification

Found New Hardware Wizard (for Windows Only) Platform Cable USB should be disconnected from the host system during the initial software installation. The first time a cable is attached after software installation, Windows invokes the Found New Hardware wizard and registers device drivers for the Platform Cable USB Firmware Loader (see Figure 5) and for the Platform Cable USB itself (see Figure 6). Windows invokes the Found New Hardware flow each time Platform Cable USB is plugged into a different physical USB port for the first time. The wizard screens could be slightly different for...

X-Ref Target - Figure 8 The cable can be attached and removed from the host computer without the need to power-down or reboot. There is a momentary delay after connecting the cable to an available port before the Status LED illuminates. This process is called enumeration. When Platform Cable USB completes the enumeration process on a Windows system, a "Programming cables" entry appears in the Windows Device Manager (see Figure 7). To display Device Manager, right-click on My Computer, then select Properties → Hardware → Device Manager. X-Ref Target - Figure 7 Figure 8: iMPACT Cable...

In Boundary-Scan mode, iMPACT 7.1i (and later) queries the BSDL file of each device in a target Boundary-Scan chain to determine the maximum Boundary-Scan clock (JTAG TCK) frequency. iMPACT 7.1i (and later) automatically restricts the available TCK_CCLK_SCK selections to frequencies that are less than or equal to the slowest device in the chain. By default, iMPACT 7.1i (or later) selects either 6 MHz or the highest common frequency when any device in the Boundary-Scan chain is not capable of 6 MHz operation. Table 2 shows the maximum supported JTAG TCK frequency for a variety of Xilinx...

X-Ref Target - Figure 11 X-Ref Target - Figure 12 Amber indicates no target voltage Green indicates target voltage present ds300_11a_113004 Figure 12: Suspend Warning When iMPACT Is Busy The target interface logic, including drivers for TCK_CCLK_SCK, TMS_PROG_SS, and TDI_DIN_MOSI, is not powered in the Suspend mode. These signals float to any DC bias level provided by the target hardware during Suspend. Figure 11: Status LEDs Indicating Target Voltage Note: Some computers remove power entirely from the USB port in Suspend mode. This is equivalent to a physical disconnect of the cable. When...

Platform Cable USB Notes: X-Ref Target - Figure 13 This method of connection is not recommended because it can result in poor signal integrity. Additionally, damage can result if the leads are unintentionally connected to high voltages. One flying wire adapter with wires is supplied with the Platform Cable USB. Additional flying wire adapters with wires can be purchased separately (see "Ordering Information," page 19). Physical Connection to the Host Each Platform Cable USB includes a detachable, Hi-Speed certified 1.8 meter A-B cable (Figure 16). Under no circumstances should user-supplied...