User guide

18 www.xilinx.com AC701 Evaluation Board
UG952 (v1.1) January 30, 2013
Chapter 1: AC701 Evaluation Board Features
SD Card Interface
[Figure 1-2, callout 4]
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. Figure 1-7
shows the connections of the SD card interface on the AC701 board.
Table 1-7 lists the SD card interface connections to the FPGA.
X-Ref Target - Figure 1-6
Figure 1-6: SPI J7 External Programming Connector
UG952_c1_06_092812
VCC3V3
GND
2
3
4
6
8
7
5
9
FLASH_D3
FLASH_D2
QSPI_CS_B
FLASH_D0
FLASH_D1
FPGA_CCLK
1
FPGA_PROG_B
J7
HDR
1X9
X-Ref Target - Figure 1-7
Figure 1-7: SD Card Interface
UG952_c1_07_100212
SDIO Card
Connector
U29
DETECT
DAT2
DAT1
DAT0
CLK
CMD
CD_DAT3
VDD
PROTECT
GNDTAB2VSS1
GNDTAB1
VSS2
GND
GND
SDIO_SDWP
11
SDIO_SDDET
10
SDIO_DAT2
9
SDIO_DAT1
8
SDIO_DAT0 7
SDIO_CLK
5
SDIO_CMD
1SDIO_CD_DAT3
VCC3V3
C52
0.1μF 25V
X5R
GND
4
6
3
D_P
12
GNDTAB3
GNDTAB4
IOGND1
IOGND2
15
16
17
18
13
14
51.1K 1% Eight Places
VCC3V3
R319
R325
R324
R318
R322 R323
R317
R321
2
To
FPGA
Bank 14
(U1)