ML410 Embedded Development Platform
www.xilinx.com
25
UG085 (v1.7.2) December 11, 2008
Detailed Description
R
Configuration
ML410 platforms support configuration in JTAG mode only. Configuration can be
accomplished by using a Xilinx download cable (such as Parallel Cable IV or Platform
Cable USB) or by using the onboard System ACE CompactFlash solution. See
“System
ACE CF Controller,” page 44
.
I/O Voltage Rails
The FPGA requires different banking voltages that are set based on the I/O voltage
interface requirements of each device directly connected to the FPGA. The Virtex-4 FPGA
I/O can be configured to use different I/O standards such as SSTL18 as required on the
DDR2 DIMM interface. See the
Virtex-4 Data Sheet
[Ref 3]
for more information regarding
I/O standards.
The voltage applied to the FPGA I/O banks used by the ML410 platforms is summarized
in
Table 2-1
.
Digitally Controlled Impedance (DCI)
Some FPGA banks can support the DCI feature in Virtex-4 FPGAs. Support for DCI is
summarized in
Table 2-2
.
Table 2-1:
I/O Voltage Rail of FPGA Banks
FPGA Bank
I/O Voltage Rail
Description
1
2.5V
PCI Express controls and DDR1
2
2.5V
LCD and SPI
3
2.5V
Clocks and miscellaneous signals
4
2.5V
Clocks and miscellaneous signals
5
2.5V
DDR
6
3.0V
VGA, PHY, and both UARTs
7
2.5V
PMIO, CPU debug, and ATD
8
2.5V
PMIO and trace port
9
1.8V
DDR2
10
3.0V
PCI
11
1.8V
DDR2
12
3.0V
System ACE, PMIO_3V, and LEDs
Note:
User selectable as 3.0V (default) or 2.5V. See
schematic sheet 46 (R486–R488 and R489–R491).
Table 2-2:
DCI Capability of FPGA Bank
FPGA
Bank
DCI Capability
FPGA
Bank
DCI Capability
1
Not supported.
7
Yes, 49.9
Ω
resistors are installed.
2
Not supported.
8
Yes, 49.9
Ω
resistors are installed.
3
Not supported.
9
Yes, 49.9
Ω
resistors are installed.
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