Part 3.11: Expansion Header - Alinx AX7A035 User Manual

Figure 3-10-2: LM75 Sensor on the FPGA Board
LM75 Sensor Pin Assignment

Part 3.11: Expansion Header

The carrier board is reserved with two 0.1inch spacing standard 40-pin
expansion ports J11 and J13, which are used to connect the ALINX modules or
the external circuit designed by the user. The expansion port has 40 signals, of
which 1-channel 5V power supply, 2-channel 3.3 V power supply, 3-channle
ground and 34 IOs. Do not directly connect the IO directly to the 5V device
to avoid burning the FPGA. If you want to connect 5V equipment, you
need to connect level conversion chip.
A 33 ohm resistor is connected in series between the expansion port and
the FPGA connection to protect the FPGA from external voltage or current. The
circuit of the expansion port (J11) is shown in Figure 3-11-1.
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ARTIX-7 FPGA Development Board AX7A035 User Manual
Pin Name
I2C_SCL
I2C_SDA
FPGA Pin
M15
M16
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