Datasheet

Platform Cable USB
DS300 (v3.3) June 25, 2014 www.xilinx.com
Product Specification 5
R
Hot Plug and Play
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.
iMPACT Configuration Cable Selection
Platform Cable USB can be designated as the "active"
configuration cable by following the auto-connect sequence
for configuring devices that is displayed when first starting
an iMPACT session.
Note:
During the auto-connect sequence, iMPACT selects PC4
as the "active" cable if both PC4 and Platform Cable USB are
connected simultaneously.
Alternatively, the cable can be manually selected using
the Output → Cable Setup option on the iMPACT toolbar
(see Figure 8).
When the Cable Communications Setup dialog box is
displayed (Figure 9), the Communication Mode radio
button must be set to "Platform Cable USB."
Before switching from the Boundary-Scan mode to the Slave
Serial mode or vice versa, use Output → Cable Disconnect.
After the mode switch is complete, reestablish the cable
connection using the Output → Cable Setup dialog.
If an iMPACT session is active when the cable is removed,
the Status bar immediately indicates "No Connection."
Configuration Clock Speed
The Platform Cable USB configuration clock
(TCK_CCLK_SCK) frequency is selectable. Ta ble 1 shows
the complete set of available TCK_CCLK_SCK speed
selections for high-power USB ports.
In slave-serial or SPI mode, the TCK_CCLK_SCK speed
can be set to any one of the available selections. By default,
the TCK_CCLK_SCK speed is set to 6 MHz. Users should
take care to select a TCK_CCLK_SCK frequency that
matches the slave-serial clock (CCLK or SPI clock)
specification of the target device.
X-Ref Target - Figure 7
Figure 7: Device Manager Cable Identification
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X-Ref Target - Figure 8
Figure 8: iMPACT Cable Selection Drop-Down Menu
X-Ref Target - Figure 9
Figure 9: iMPACT Cable Communication Setup Dialog
Tab l e 1: Speed Selection for High-Power Ports
Selection
TCK_CCLK_SCK
Frequency
Units
124MHz
212MHz
3 (default) 6 MHz
43MHz
51.5MHz
6 750 kHz
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