Hardware Description
4.2 LEDs
Name RefDes
Color
Usage
+3.3 Volt
D3
Green
3.3Volt power on the UUT
+3.3 V AUX
D2
Green
3.3 Volt local Auxiliary Power
+ 12 Volt
D4
Green
+12Volt power on the UUT
Power Fail
D1
Red
UUT power Fail (In case overload or under voltage)
Table 2: LEDs
In case that “Power Fail” LED is ON (overload or under voltage condition happens) it is
necessarily to toggle on UUT power switch SW1 for reset fail condition.
4.3 Switch
Name RefDes
Type
Usage
UUT
Power
ON/OFF
SW1
Toggle x 1
Power switch for the UUT. In case Power OFF – all
PCI signals from the Primary PCI bus are
disconnected from the UUT (Hot swapping)
MODE
SW2
Toggle x 4
Four toggle switches define extender logic between
Parallel interface and UUT download interface
Table 3: Switches
Follow table shows setting for the different SW2 switch settings:
1 2
3
4
Usage
ON ON
ON
ON
Test mode for update CPLD logic itself (XC9572XL-
10VQ44)
ON
ON
ON
OFF
JTAG / Parallel download interface for Xilinx
OFF
ON
ON
OFF
JTAG / Parallel download interface for Altera
ON
OFF
ON
OFF
JTAG / Parallel download interface for Lattice
OFF
OFF
ON
OFF
Download interface for ATMEL
ON
ON OFF OFF Master
SPI
interface
OFF ON OFF OFF Master
I2C
interface
ON
OFF OFF OFF SPARE
mode
OFF OFF OFF OFF SPARE
mode
PCI Express Extender, Hardware Manual, Revision 1.4
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