Interface Pin Descriptions; Jtag/Spi/Slave Serial Port: 2-Mm Connector Signals - Xilinx Platform Cable USB II Manual

X-Ref Target - Figure 30
(A)
12 Mb/s Bus Speed
1.X Root Hub
500
mA
Platform Cable
USB II
Enumerates at
full speed because
root hub only
operates at full
speed — degraded
performance due
to slow bus speed
Figure 30: Platform Cable USB II Performance with Various Hub Types

Interface Pin Descriptions

Table 6: JTAG/SPI/Slave Serial Port: 2-mm Connector Signals
Pin
JTAG
Number
Configuration
2 V
REF
4 TMS
6 TCK
8 TDO
DS593 (v1.2.1) March 17, 2011
(B)
12 Mb/s Bus Speed 480 Mb/s Bus Speed
1.X Root Hub 2.0 Root Hub
500
mA
Power
2.0 External 2.0 External
Bus-Powered Self-Powered
Hub
< 500
mA
Platform Cable
USB II
Enumerates at
full speed because
root hub only
operates at full
speed — degraded
performance due
to slow bus speed
MODE
SPI Slave-Serial
(1)
Programming Configuration
V V
REF REF
– –
– –
– –
www.xilinx.com
(C)
480 Mb/s Bus Speed
2.0 Root Hub
500
mA
Power
2.0 External
Self-Powered
Hub Hub
< 500
mA
Platform Cable Platform Cable
USB II
Enumerates at full speed
because 2.0 external
hub operates at full performance due to
speed — degraded
performance due to slow
bus speed. Cable may
not enumerate.
(2)
Direction
In
Out
Out
In
Platform Cable USB II
(D) (E)
480 Mb/s Bus Speed
2.0 Root Hub
500
mA
Platform Cable
USB II
Enumerates at
Hi-Speed — best
500
mA performance due to
high bus speed.
USB II
Enumerates at
Hi-Speed — best
high bus speed.
Description
Target Reference Voltage
should be connected to a voltage bus on the
target system that serves the JTAG, SPI or
Slave Serial interface. For example, when
programming a CoolRunner-II device using
JTAG, V should be connected to the
REF
target V bus.
AUX
JTAG Test Mode Select. This pin is the
JTAG mode signal establishing appropriate
TAP state transitions for target ISP devices
sharing the same data stream.
JTAG Test Clock. This pin is the clock
signal for JTAG operations and should be
connected to the TCK pin on all target ISP
devices sharing the same data stream.
JTAG Test Data Out. This pin is the serial
data stream received from the TDO pin on
the last device in a JTAG chain.
500
mA
DS593_30_021408
(3)
. This pin
29