3Development Board Circuit
3.9GPIO
DBUG354-1.0E
24
(
30
)
3.8.2
Pins Distribution
Table 4-3 SD Card Pins Distribution
Signal Name
FPGA Pin No.
BANK
I/O
Description
SD_D0
M8
3
3.3V
Data bits 0
SD_D1
N8
3
3.3V
Data bits 1
SD_D2
L9
3
3.3V
Data bits 2
SD_CD/D3
N9
3
3.3V
Card detection/Data bits 3
SD_CMD
P9
3
3.3V
Commands/Response
SD_CLK
L8
3
3.3V
Clock
SD_SWITCH
M11
2
3.3V
Insertion Detection
3.9
GPIO
3.9.1
Introduction
Two double row pins with the pitch of 2.54mm are reserved on the
development board. The 20 pin interface connects to Bank7, and the I/O
voltage can be adjusted as 3.3V, 2.5V, and 1.2V. The I/O voltage of the 30
pin can be set as 2.5V, as shown in the figure below.
Figure 3-11 20pin Interface
1
3
5
7
9
2
4
6
8
10
11
13
15
17
19
12
14
16
18
20
H_A_IO1
H_A_IO3
H_A_IO5
H_A_IO7
H_A_IO9
H_A_IO11
H_A_IO13
H_A_IO15
H_A_IO2
H_A_IO4
H_A_IO6
H_A_IO8
H_A_IO10
H_A_IO12
H_A_IO14
H_A_IO16
3.3V
5.0V
J3