The AR9331 is a minimal system which installed with OpenWrt Linux system and support 2.4G WiFi It is compatible with 802.11b/g/n has rich interface such as Ethernet, USB, UART and plenty of GPIOs and use small outline package, it is used widely in mini routers and IoT projects.
Specification
- CPU: ATHEROS AR9331 chipset, which integrates MIPS 24Kc processor, CPU 400MHz, Switch (MAC, PHY) and integrates with MAC, RF, PA and LNA for WiFi.
- RAM : 64MB;
- Flash : 16MB;
- Interfaces: RJ45, USB Host, UART, USB2.0, SPI, I2S, SLIC, SPDIF, JTAG and GPIOs(See from the product picture).
- OS: Open Source OpenWrt
- Power: 3.3v power input
- WiFi: Support 150M 2.4Ghz WiFi, 802.11 b/g/n
- Frequency range: 2.4~2.4835GHz
- Modulation: BPSK, QPSK, CCK and OFDM (BPSK/QPSK/16-QAM/ 64-QAM)
- Sensitivity @PER : 135M : -65dBm@10%PER; 65M : -65dBm@10%PER; 54M : -68dBm@10%PER; 11M : -84dBm@8% PER; 6M : -88dBm@10% PER; 1M : -90dBm@8% PER
- Typical Distance: Indoor: 60m (max); Outdoor 150m (max) (with 2 dBi antenna)
- RF Power: 11n: 13dBm; 11g: 13-15dBm, 11b: 16-18dBm,
- Connector: I-PEX connector. Provide Optional ANT pin out for SMT
- Dimension:35.5x22x3mm
Pin definition(See from the product picture)
Pin
No. |
signal |
Direction(defluat) |
Remark |
| 1 |
GND |
|
GROUND |
| 2 |
ANT |
|
Antenna Output |
| 3 |
GND |
|
GROUND |
| 4 |
GND |
|
GROUND |
| 5 |
CSO |
|
SPI CS pin |
| 6 |
MOSI |
|
SPI MOSI pin |
| 7 |
MISO |
|
SPI MISO pin |
| 8 |
SCK |
|
SPI SCK pin |
| 9 |
GPIO11/RESET BOTTON |
Reset Button PIN |
H-Level is active |
| 10 |
I012 |
|
General I/0 |
| 11 |
I08 |
|
General I/0 |
| 12 |
I07 |
|
General I/0 |
| 13 |
I06 |
|
General I/0 |
| 14 |
I026 |
|
General I/0 |
| 15 |
I028 |
|
General I/0 |
| 16 |
I017 |
0UT/LED |
LED for Ethernet
Port4 |
| 17 |
I016 |
|
General I/0 |
| 18 |
I015 |
0UT/LED |
LED for Ethernet
Port2 |
| 19 |
I014 |
|
General I/0 |
| 20 |
I013 |
0UT/LED |
LED for Ethernet
Port0 |
| 21 |
I001 |
|
General I/C |
| 22 |
I000 |
|
General I/0 |
| 23 |
GND |
|
GROUND |
| 24 |
TXD |
|
Serial data IN(TX) |
| 25 |
RXD |
|
Serial data OUT
(RX) |
| 26 |
GND |
|
GROUND |
| 27 |
RST |
|
RESET |
| 28 |
I023 |
|
General I/0 |
| 29 |
I019 |
|
General I/0 |
| 30 |
I022 |
|
General I/0 |
| 31 |
I020 |
|
General I/0 |
| 32 |
I021 |
|
General I/0 |
| 33 |
I018 |
|
General I/0 |
| 34 |
I024 |
|
General I/0 |
| 35 |
GND |
|
GROUND |
| 36 |
P4_RX+ |
|
Eth erne t Port4 |
| 37 |
P4_RX-
|
|
| 38 |
P4_TX+ |
|
|
| 39 |
P4_TX-
|
|
| 40 |
P2_RX+ |
|
Ethernet Port2 |
| 41 |
P2_RX-
|
|
| 42 |
P2_TX+ |
|
| 43 |
P2_TX-
|
|
| 44 |
PO_RX+ |
|
Ethernet Port0 |
| 45 |
PO_RX-
|
|
| 46 |
PO_TX+ |
|
| 47 |
PO_TX-
|
|
| 48 |
NET POW |
|
2.5v output for
Ethernet |
| 49 |
GND |
|
GROUND |
| 50 |
USB- |
|
USB Master USB- |
| 51 |
USB+ |
|
USB Master USB+ |
| 52 |
GND |
|
GROUND |
| 53 |
VCC3V3 |
|
Power Supp ly, 3.3V |
| 54 |
VCC3V3 |
|
Power Supply,3.3V |
Applications:
- Internet of Things
- Voice over IP
- Mesh WiFi
- 3G/4G router
- Industrial Control
