Xilinx ML405 User Manual page 19

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Table 1-9: Expansion I/O Single-Ended Connections (J6) (Continued)
Other Expansion I/O Connectors
In addition to the high-speed I/O paths, additional I/O signals and power connections are
available to support expansion cards plugged into the ML405 board. The 14 I/O pins from
the general-purpose pushbutton switches and LEDs on the board are connected to
expansion connector J3. This permits additional I/Os to connect to the expansion
connector if the pushbutton switches and LEDs are not used. The connection also allows
the expansion card to utilize the pushbutton switches and LEDs on the board.
The expansion connector also allows the board's JTAG chain to be extended onto the
expansion card by setting jumper J26 accordingly.
The IIC bus on the board is also extended onto the expansion connector to allow additional
IIC devices to be bused together. If the expansion IIC bus is to be utilized, the user must
have the IIC pull-up resistors present on the expansion card. Bidirectional level shifting
transistors allow the expansion card to utilize 2.5V to 5V signaling on the IIC bus.
Power supply connections to the expansion connectors provide ground, 2.5V, 3.3V, and 5V
power pins. If the expansion card draws significant power from the ML405 board, ensure
that the total power draw can be supplied by the board.
The ML405 expansion connector is backward compatible with the expansion connectors
on the ML32X and ML42X boards, thereby allowing their daughter cards to be used with
the ML405 evaluation platform.
I/O connections.
ML405 Evaluation Platform
UG210 (v1.5.1) March 10, 2008
J6 Pin Schematic Net Name
56 HDR1_44
58 HDR1_58
60 HDR1_8
62 HDR1_62
64 HDR1_64
www.xilinx.com
FPGA Pin
AC17
AB17
AB16
AB15
AA15
Table 1-10, page 20 summarizes the additional expansion
Detailed Description
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