DE4 User Manual
53
www.terasic.com
June 20, 2018
Figure 2
–22 Connections between the SD card and Stratix IV GX
Table 2–19 SD Card Socket Pin Assignments, Schematic Signal Names, and Functions
Schematic
Signal Name
Description
I/O Standard
Stratix IV GX Pin
Number
E_SD_CLK
Clock for SD
1.8-V
PIN_AT19
SD_WP_n
Write protection for SD
1.8-V
PIN_AH18
E_SD_DAT0
Data bit 0 for SD
1.8-V
PIN_AR20
E_SD_DAT1
Data bit 1 for SD
1.8-V
PIN_AT20
E_SD_DAT2
Data bit 2 for SD
1.8-V
PIN_AU19
E_SD_DAT3
Data bit 3 for SD
1.8-V
PIN_AU20
E_SD_CMD
Command for SD
1.8-V
PIN_AV20
2
2
.
.
1
1
0
0
C
C
l
l
o
o
c
c
k
k
C
C
i
i
r
r
c
c
u
u
i
i
t
t
r
r
y
y
Stratix IV GX FPGA Clock Inputs and Outputs
The DE4 development board contains three types of clock inputs which include 16 global clock
inputs pins, external PLL clock inputs and transceiver reference clock inputs. The clock input
sources of the Stratix IV GX FPGA originate from two on-board oscillators, a 50MHz and 100MHz,
driven through the clock buffers as well as other interfaces including HSMC, GPIO expansion
headers, and SMA connectors. The overall clock distribution of the DE4 is presented in
Figure
2–23
.
Table 2–20
depicts the clock options available and their associated DIP switch settings.
Summary of Contents for ALTERA DE4
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Page 83: ...DE4 User Manual 83 www terasic com June 20 2018 Figure 3 8 Access DDR2 SO DIMM memory ...
Page 92: ...DE4 User Manual 92 www terasic com June 20 2018 Figure 3 17 Fan Control of the DE4 ...
Page 150: ...DE4 User Manual 150 www terasic com June 20 2018 Figure 5 35 SOPC builder ...