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AT91SAM9G20 (ARM9) Module, Ethernet, 2x USB Host, 4x UART, SD US$170.00

AT91SAM9G20 (ARM9) Module, Ethernet, 2x USB Host, 4x UART, SD

M-502 is a credit card size ARM9 Linux-based System on Module (SoM). M-502 is powered by 400MHZ ARM926EJ-S ARM Thumb Processor with memory management unit, and equipped with 64MB SDRAM, 128MB NAND Flash, and 2MB DATAFlash. M-502 is also pre-installed with Linux 2.6.29 OS, busybox utility collection, lighttpd Web server, and various hardware device drivers.

M-502 comes with one 10/100Mbps Ethernet, two USB 2.0 hosts, four UARTs with hardware/software flow control, and 32 programmable digital I/Os. In addition, Secure Data Card (SD) interface, Serial Peripheral Interface (SPI), Inter-IC(I2C) bus, Inter-IC Sound (I2S) bus, and 8-bit local bus are included. M-502 is a reliable SoM to be used in various embedded systems.

It is ideal for all kinds of industrial applications, including intelligent transportation system (ITS), building automation, energy-saving system, and scenario control systems.

  • Atmel 400MHz AT91SAM9G20 CPU w/ MMU
  • Linux kernel 2.6.29 with file system
  • 64MB SDRAM/128MB NAND Flash
  • 2MB DataFlash for system recovery
  • On-board real-time clock w/ backup battery
  • 1 x 10/100Mbps Ethernet
  • On-board Ethernet PHY/transformer
  • 2 x USB 2.0 Hosts supporting full speed of 12Mbps
  • 1 x SD (secure digital) interface
  • 4 x 921.6Kbps UARTs w/ hardware flow control
  • I2C Interface
  • I2S Interface, one transmitter and one receiver
  • SPI w/ 3 x chip select signals
  • 32 x GPIOs, CMOS/3.3V compatible
  • Compact size, 50 x 80mm only
  • Ultra low power consumption of less than 2.5W
  • GNU C/C++ tool chain is included
  • Available in standard and extended temperature range (see below)

AT91SAM9G20 Module Hardware Specifications

NAND Flash: 128MB
DataFlash®: 2MB, for system backup

Network Interface
Type: Ethernet, 10/100Mbps
Protection: 1.5KV magnetic isolation

Port 0: TXD0, RXD0, RTS0, CTS0, GND
Port 1: TXD1, RXD1, RTS1, CTS1, DCD1, DTR1, DSR1,GND
Port 2: TXD2, RXD2, RTS2, CTS2,GND
Port 3: TXD3, RXD3, RTS3, CTS3,GND
Signal Level: CMOS/3.3V compatible

Common UART Parameters
Baud Rate: up to 921.6Kbps
Parity: None, Even, Odd, Mark, Space
Data Bits: 5, 6, 7, 8
Stop Bit: 1, 1.5, 2
Flow Control: RTS/CTS, XON/XOFF, None

UART Advanced Feature (when used as RS-485)
Supports 9-bit Multi-drop mode
Supports hardware auto direction control

USB Ports
Hosts: Two, USB 2.0 compliant
Host Signals: UdataA+, UdataA-,UdataB+,UdataBDevice
(Client): One, USB 2.0 compliant
Device (Client) Signals: Uddata+, Uddata-, Udio

I2C (Inter-IC Bus)
Signals: TWD, TWDK
Supported Devices: (driver has been built-in)

I2S (Inter-IC Sound)
Transmitter Signals: TSCK, TWS, TSD
Receiver Signals: RSCK, RWS, RSD

SPI (Serial Peripheral Interface)
Signals: MISO, MOSI, SPCK, CS1, CS2

SD (Secure Digital Card Interface)
Compatible with SD memory card Specification 1.0

Watchdog Timer
CPU built-in internal watchdog timer, used by Linux kernel
Additional watchdog timer is available for user applications

General-Purpose IOs (GPIO)
32 x GPIOs can be programmed as digital input or output
Supports interrupt function when GPIOs are set as digital input
Signal Level: CMOS/3.3V compatible

Pre-defined Pins
Reset Button (CN2, pin#35), input
Buzzer (CN2, pin#37), output
2-pin DIP SW (CN2, pin#12,#13), input
System ready LED (CN2, pin#38), output
LAN activity LED (CN3, pin#11), output

Real Time Clock
Chip: ST M41T81
Backup Battery: Lithium, 48mAh

Debug Ports
JTAG Port: for low level debug
Console Port: RS-232(Tx/Rx) serial console

Local Bus
Data Bus: 8-bit (D0~D7)
Address Bus: 8-bit (A0~A7)
Chip Select: x 3 (CS0, CS5, CS6)
Control Bus: RD, WR
Signal Level: CMOS/3.3V Compatible

Power Consumption
Input range: 3.0 to 3.6VDC (3.3V nominal)
Consumption: 2W

Power Consumption
Board Dimension: 50 x 80mm
2.0mm pitch Connectors
CN1: 28 pins; CN2: 50 pins; CN3: 50 pins
Mounting Holes: x 4, 2.0mm (M2) in diameter

AT91SAM9G20 Module Software Specifications

OS: Linux, Kernel 2.6.29
Boot Loader: U-Boot 1.3.4
File Systems: UBI, JFFS2, ETX2/ETX3, VFAT/FAT, NFS

Pre-installed Utilities
bash, busybox, sysvinit, wget, ipkg, procps (for webmin), psmics, lighttpd, vsftpd, iptable, ppp, ssh, wireless_tools, util-linux-mount/umount, usbutils, Artila utility. (More utilities can be found in the product CD.)

Daemons Started by Default
ssh (secured shell) with sftp
syslog/klogd (system and kernel log)
telnet server (disable root with/etc/security)
ftp server (vsftp)
Web server (lighttpd)
amgrd (Artila broadcast search daemon)

Package Management & System Administration
Supports ipkg to manage the package installation, upgrade and removal
Supports webmin (use ipkg install webmin to install) for web-based system administration

Tool Chain for Linux
GCC: C/C++ PC cross compiler

Standard Device Drivers
Real Time Clock, SD/MMC, UART, Ethernet, GPIO, Buzzer
EEPROM: supports ATMEL AT24C16 and its compatibles

Pre-load USB Host Drivers (customizable)
Flash thumb disk
IEEE-802.11b/g WiFi adapter (Ralink rt73usb, Ralink rt2500usb, Realtek RTL8187, ZyDAS zd1211rw)
10/100Mbps Fast Ethernet adapter (RT8150)
RS-232 adapter (prolific PL-2303)
ADSL modem
ISDN modem (CDC/ACM compatible)


Available Options:
Temperature Range:

This product was added to our catalog on Thursday 13 January, 2011.


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