40Pin Expansion Port - Alinx AX7Z035B User Manual

SD card slot pin assignment:
Signal Name
SD_CLK
SD_CMD
SD_D0
SD_D1
SD_D2
SD_D3

3.10 40Pin Expansion Port

The carrier board is reserved with one 2.54-mm standard 40-pin expansion ports
J33, which are used to connect the ALINX modules or the external circuit designed
by the user himself. The expansion port has 40 signals with 1x 5V power supply, 2x
3.3 V power supply, 3x ground and 34x IO. IO of expansion port is connected to the
IO of BANK12 of ZYNQ chip, the default is 3.3V. Do not directly connect the IO to 5V
devices to avoid burning the FPGA. If you want to connect 5V devices, you need to
connect a level conversion chip first.
The circuit of the expansion port (J33) is shown in Figure 3-10-1:
51 / 58
Figure 3-9-1: SD Card Connection Diagram
ZYNQ Pin Name
PS_MIO40
PS_MIO41
PS_MIO42
PS_MIO43
PS_MIO44
PS_MIO45
AX7Z035B User Manual
ZYNQ Pin Number
C22
C19
F17
D18
E18
C18
Description
SD Clock Signal
SD Command Signa
SD Data0
SD Data1
SD Data2
SD Data3
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