Xilinx M401 User Manual page 22

Detailed Description
Table 10: 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 ML40x board (see
The 14 I/O pins from the general purpose buttons and LEDs on the board are connected to
expansion connector J3. This arrangement permits additional I/Os to be connected to the
expansion connector if the buttons and LEDs are not used. It also allows the expansion
card to utilize the buttons 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 ML40x board, the user
must ensure that the total power draw can be supplied by the board.
The ML40x expansion connector is backward compatible with the expansion connectors
on the ML320, ML321, and ML323 boards, thereby allowing their daughter cards to be
used with the ML40x evaluation platform.
expansion I/O connections.
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22
Header Pin Label
J6, Pin 58 HDR1_58
J6, Pin 60 HDR1_8
J6, Pin 62 HDR1_62
J6, Pin 64 HDR1_64
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FPGA Pin
AB21
AD22
AE24
AF24
Table 11, page 23 summarizes the additional
ML401/ML402/ML403 Evaluation Platform
UG080 (v2.5) May 24, 2006
R
Table 11, page 23).