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ZYNQ Ultr FPGA Board AXU5EV-P User Manual
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Part 3.7: SD Card Slot Interface
The AXU5EV-P FPGA Development Board contains a Micro SD card
interface to provide user access to the SD card memory, the BOOT
program for the ZU4EV chip, the Linux operating system kernel, the file
system and other user data files.
The SDIO signal is connected to the IO signal of the PS BANK501 of
ZU4EV. Since the VCCMIO of the BANK is set to 1.8V, but the data level of the
SD card is 3.3V, connected through the TXS02612 level shifter. The schematic
of the Zynq7000 PS and SD card connector is shown in Figure 3-7-1:
Figure 3-7-1: SD Card Connection Diagram
SD card slot pin assignment:
Signal Name
Pin Name
Pin Number
Description
SD_CLK
PS_MIO51
l21
SD Clock Signal
SD_CMD
PS_MIO50
M19
SD Command Signal
SD_D0
PS_MIO46
L20
SD Data0
SD_D1
PS_MIO47
H21
SD Data1
SD_D2
PS_MIO48
J21
SD Data2
SD_D3
PS_MIO49
M18
SD Data3
SD_CD
PS_MIO45
K20
SD card insertion signal