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Chapter 1:
AC701 Evaluation Board Features
SD Card Interface
[Figure
The AC701 board includes a secure digital input/output (SDIO) interface to provide user-logic
access to general purpose nonvolatile SDIO memory cards and peripherals. The SD card slot is
designed to support 50 MHz high speed SD cards.
The SDIO signals are connected to I/O bank 14, which has its VCCO set to 3.3V.
the connections of the SD card interface on the AC701 board.
X-Ref Target - Figure 1-7
Table 1-7
Table 1-7: SDIO Connections to the FPGA
22
Send Feedback
1-2, callout 4]
To FPGA
Bank 14
(U1)
lists the SD card interface connections to the FPGA.
Schematic Net
FPGA Pin (U1)
Name
R20
SDIO_SDWP
P24
SDIO_SDDET
N23
SDIO_CMD
N24
SDIO_CLK
P23
SDIO_DAT2
N19
SDIO_DAT1
P19
SDIO_DAT0
P21
SDIO_CD_DAT3
www.xilinx.com
VCC3V3
VCC3V3
51.1K 1% Eight Places
SDIO_DAT0
SDIO_DAT1
SDIO_DAT2
SDIO_CD_DAT3
SDIO_CMD
SDIO_CLK
SDIO_SDDET
SDIO_SDWP
Figure 1-7: SD Card Interface
I/O Standard
LVCMOS33
LVCMOS33
LVCMOS33
LVCMOS33
LVCMOS33
LVCMOS33
LVCMOS33
LVCMOS33
Figure 1-7
C52
0.1μF 25V
X5R
GND
U29
SDIO Card
Connector
4
VDD
7
DAT0
8
DAT1
9
DAT2
1
CD_DAT3
2
CMD
5
CLK
10
18
DETECT
IOGND2
11
17
PROTECT
IOGND1
12
16
D_P
GNDTAB4
15
GNDTAB3
3
14
VSS1
GNDTAB2
13
6
VSS2
GNDTAB1
GND
GND
UG952_c1_07_100212
U29 SDIO Connector
Pin Number
Pin Name
11
SDWP
10
SDDET
2
CMD
5
CLK
9
DAT2
8
DAT1
7
DAT0
1
CD_DAT3
AC701 Evaluation Board
UG952 (v1.4) August 6, 2019
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