Expansion Port - Alinx AX301 User Manual

Buzzer pin assignment:
Signal Name

17. Expansion Port

The development board reserves 2 expansion ports, and the expansion port has 40 signals, 1
5V power supply, 2 3.3V power supplies, 3 grounds, and 34 IO ports. These IO ports are
independent IO ports and are not multiplexed with other devices. The IO port is connected to
the FPGA pin at a level of 3.3V. Do not directly connect directly to the 5V device to avoid
burning the FPGA. If you want to connect 5V equipment, you need to connect the level
conversion chip.
A 33 ohm resistor is connected in series between the expansion port and the FPGA
connection to protect the FPGA from damage caused by excessive external voltage or
current. The circuits of expansion ports J1 and J2 are shown in Figure 17-1 and 17-2.
J1 pin assignment:
Pin
1
3
5
7
9
11
13
15
17
19
21
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BUZZER
Figure 17-1
Signal Name
GND
T14
T13
T12
T11
T10
T9
T8
T7
T6
T5
AX301 User Manual
Pin
C11
Figure 17-2
Pin Name Pin Number
2 VCC5V
4
6
8
10
12
14
16
18
20
22
R13
R12
R11
R10
R9
R8
R7
R6
R5
R4
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