Sd Card Interface - Xilinx AC701 User Manual

Chapter 1: AC701 Evaluation Board Features
Figure 1-6
X-Ref Target - Figure 1-6

SD Card Interface

[Figure
The AC701 board includes a secure digital input/output (SDIO) interface to provide
user-logic access to general purpose non-volatile 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.
shows the connections of the SD card interface on the AC701 board.
X-Ref Target - Figure 1-7
18
shows the J7 SPI external programming connector.
J7
1 FPGA_PROG_B
2 FLASH_D3
3 FLASH_D2
4 QSPI_CS_B
5 FLASH_D0
6
FLASH_D1
7
FPGA_CCLK
8
9
HDR
1X9
Figure 1-6: SPI J7 External Programming Connector
1-2, callout 4]
51.1K 1% Eight Places
To FPGA
Bank 14
(U1)
Figure 1-7: SD Card Interface
www.xilinx.com
VCC3V3
GND
UG952_c1_06_092812
VCC3V3 VCC3V3
U29
4
VDD
7
SDIO_DAT0
DAT0
8
SDIO_DAT1
DAT1
9
SDIO_DAT2
DAT2
1
SDIO_CD_DAT3
CD_DAT3
2
SDIO_CMD
CMD
5
SDIO_CLK
CLK
10
SDIO_SDDET
DETECT
11
SDIO_SDWP
PROTECT
12
D_P
3
VSS1
6
VSS2
GND
Figure 1-7
C52
0.1µF 25V
X5R
GND
SDIO Card
Connector
18
IOGND2
17
IOGND1
16
GNDTAB4
15
GNDTAB3
14
GNDTAB2
13
GNDTAB1
GND
UG952_c1_07_100212
AC701 Evaluation Board
UG952 (v1.2) August 28, 2013