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20
KC705 Evaluation Board
UG810 (v1.3) May 10, 2013
Chapter 1:
KC705 Evaluation Board Features
Four data lines and the FPGA CCLK pin are wired to the Quad-SPI Flash memory. A
common chip select (FPGA_FCS) shared between the Linear BPI Flash and the Quad-SPI
Flash is controlled by the configuration mode settings on DIP switch SW13 position 5 (M0)
and a one-of-two demultiplexer device U64. If mode pin M0 = 1, the SPI device is selected.
If mode pin M0 = 0, the Linear BPI Flash device is selected. The connections between the
SPI Flash memory and the FPGA are listed in
.
The configuration section of
,
7 Series FPGAs Configuration User Guide
provides
details on using the Quad-SPI Flash memory.
shows the connections of the
Quad-SPI Flash memory on the KC705 board.
For more information about the Numonyx N25Q128A13BSF40F see
.
SD Card Interface
[
, callout
]
Table 1-6:
Quad-SPI Flash Memory Connections to the FPGA
U1 FPGA Pin
Net Name
U7 Quad-SPI Flash Memory
Pin Number
Pin Name
P24
FLASH_D0
15
DQ0
R25
FLASH_D1
8
DQ1
R20
FLASH_D2
9
DQ2
R21
FLASH_D3
1
DQ3
B10
FPGA_CCLK
16
C
U19
QSPI_IC_CS_B
7
S_B
Notes:
1. FPGA_FCS connected to FPGA U1 pin U19 becomes QSPI_IC_CS_B through U64 and J3.
X-Ref Target - Figure 1-6
Figure 1-6:
128 Mb Quad-SPI Flash memory
UG810_c1_05_011912
VCC2V5
N25Q128
128 Mb Serial
Flash Memory
GND
1
2
3
5
7
6
U7
4
8
VCC_SPI
C18
0.1
μ
F 25V
X5R
FLASH_D2
DQ1
16
15
14
12
10
11
13
9
SB
NC3
NC2
NC1
NC0
VCC
HOLD_B/DQ3
WB/VPP/DQ2
VSS
NC4
NC5
NC6
NC7
DQ0
C
R17
DNP
R18
4.7k
Ω
5%
R431
15
Ω
1%
R432
15
Ω
1%
FLASH_D0
FPGA_CCLK
FLASH_D2_R
FLASH_D0_R
GND
VCC2V5
R20
DNP
R19
4.7k
Ω
5%
R21
4.7k
Ω
5%
R430
15
Ω
1%
R429
15
Ω
1%
FLASH_D2_R
FLASH_D3_R
FLASH_D3
FLASH_D1
QSPI_IC_CS_B