Network Device System-on-Chip
Designed to Simplify Embedded Linux Development
The ETRAX 100LX with a powerful CPU, MMU (Memory
Management Unit), integrated Ethernet (10/100), and many
device interfaces, is a price competitive hardware option for
designers of embedded Linux appliances such as internet
gateways, access control equipment, industry automation
controllers, BluetoothTM appliances etc. Combined with the
latest available Linux kernel, and the strong support and
design help provided by Axis' engineers, product development
teams are able to quickly get to market with competitive
products by using the AXIS ETRAX 100LX.
High Performance at Low Power Consumption
The innovative 100 MIPS 32-bit RISC design delivers
compact code and exceptional price/performance with low
power consumption. An 8-kbyte on-chip cache takes full
advantage of the CPU performance.
Built-in Memory Controllers for
Low Product Design Cost
The ETRAX 100LX has 4 GB of address space and supports
PROM without external logic, which lowers cost and
makes design easy.
Feature Rich Integrated I/O for Device Attachment
Several integrated intelligent DMA-driven ports: 2
synchronous serial ports, 4 asynchronous serial ports, 2
parallel ports (fully compatible with IEEE 1284), SCSI-2 and
SCSI-3, EIDE/ATA-2, USB (host and device mode), 10/100 full
duplex Ethernet controller.
General ports
General I/O
Data 31 - 0
serial ports
Serial interface
I/O block
Shared RAM I/f
Linux Kernel Source Code and Development
All you need in terms of software source code and tools for the
ETRAX 100LX chip can be downloaded for free from the Axis
developer site There you will also
find the extensive documentation for the ETRAX 100LX chip.
Partnership Development
Axis is committed to open-source development and fully
supporting its customers. Reference designs and advanced
technical support are available, as well as open discussion
forums to facilitate communication between the wide
range of ETRAX system developers.
Technical Specification - AXIS ETRAX 100LX
2 USB Ports
Timers and Watchdog
• RISC CPU with a 32-bit data and address
format. 15 general 32-bit registers.
Instruction set optimized for compact code
and high speed with 16/32-bit bus width.
Runs on a 100 MHz clock. User and
Supervisor mode for restricted access and
selection of appropriate address mapping by
the MMU.
• Universal Serial Bus 1.1 Host (control and
bulk traffic only) and Device mode operation.
Lists 31 endpoints with full performance in
Host mode. Hardware support for dynamic
connect/disconnect, suspend/resume and
remote wakeup.
• Two eight-bit timers with programmable clock
from 381 Hz to 12.5 MHz. Fixed timer clocks
from 300 Hz to 1843.2 kHz, and a nonstandard baudrate at 6.25 MHz. Additional
watchdog timer.
Memory Management Unit (MMU)
• MMU featuring 4 GB of virtual uniformed
address space for each user process with
address space protection so that user
applications do not have access to data of
other applications or the operating system.
Supports zero-copy shared memory schemes
and includes a 64-entry on-chip Translation
Look-aside Buffer (TLB).
Cache Memory
• 8 Kbytes on-chip direct mapped unified
instruction/data cache memory.
Ethernet Controller
• Ethernet controller supporting 100 Mbit and
10 Mbit (compatible with IEEE 802.3 and Fast
Ethernet standards). ETRAX 100LX interfaces
to Media Independent Interface and Serial
Network Interface.
Direct Memory Access (DMA)
• 10 DMA channels each with a 64 byte FIFO
for low latency and high throughput data
transfer to and from internal and external
units (200 MBytes/sec total peek bandwidth
to share between the 10 DMA channels).
Address range of 31 bits, DMA and cache
cooperation to keep memory and cache
coherent, and burst access to and from
memory to take full advantage of SDRAM and
EDO DRAM performance.
4 Asynchronous Serial Ports
• Internal baudrate programmable from 48 Hz
to 1.5625 MHz, or external baudrate up to
3.125 MHz. Fixed baudrates from 300 Hz to
1843.2 kHz, and a non-standard baudrate at
6.25 MHz.
General Purpose Ports
2 Parallel I/O Ports
• The ports can be used through register access
or internal DMA access, and can be
configured to support various protocols,
- IBM XT/AT compatible Centronics
- IBM PS/2 compatible Centronics
- Hewlett-Packard Fast Mode
- IBM Fastbyte
- Compatible with IEEE 1284 - byte, nibble,
ECP, and EPP mode.
- Parallel port wide, supporting 16-bit data
transmission, with a transmission rate of up
to 12 MByte/s.
• Master or Slave synchronous serial mode with
codec clock between 32 kHz and 4.096 MHz.
Clock Generator
• Internal 100 MHz operating frequency, generated
by a PLL from an external 20 MHz clock signal.
Interrupt Control
• Vectorized interrupt; internal (I/O ports,
network interface, DMA, and timer) and
external (IRQ and NMI).
Software and Development Tools
• Initiator (host) mode SCSI controller that
supports either two 8-bit wide or one 16-bit
wide SCSI interface. Synchronous and
asynchronous data transfer is supported,
including SCSI-3 and FAST-20. External bus
drivers are required. The SCSI interface is
multiplexed on the same pins as the
EIDE/ATA-2 ports, the parallel ports and two
of the serial ports.
• Configuration of up to 4 EIDE/ATA-2 ports for up
to 8 IDE disk drives. The EIDE/ATA-2 interfaces
are multiplexed on the same pins as the SCSI,
parallel ports and two of the serial ports.
Bus Interface and Memory
• Built-in memory controllers for SDRAM, EDO
DRAM, SRAM, EPROM, parallel EEPROM, and
FlashPROM. Bus width configurable to 16 or
32 bits. Support for 64 bit SDRAM DIMM and
SO-DIMM modules, Double Data Rate SDRAM,
and power save mode.
• The Linux kernel 2.4 or subsequent for ETRAX
100LX, including device drivers for all ETRAX
ports, is available for download from the Axis
developer Web site
Also available at the site is the GNU CC for
ETRAX 100LX including compiler, debugger, and
other tools, and extensive documentation: for
example Programmer's Manual and Designer's
Reference. All downloads and documentation is
free of charge. An ETRAX 100LX lab platform,
the AXIS Developer Board, can be ordered online at
Compatibility with ETRAX 100
• The ETRAX 100LX is code and pin compatible
with Axis’ renowned ETRAX 100, which has
shipped in several million units. The ETRAX
100LX extends the applicability for embedded
Linux designs through an added MMU and
device interfaces.
• 256-pin Plastic Ball Grid Array package,
27 x 27 x 2.15 mm
Bootstrap Program Download
2 Synchronous Serial Ports
• Two general-purpose ports that each contains
8 bits of individually controlled I/O-pins.
• Support for initial loading to internal cache
memory from parallel port, serial port and
network. Code, loaded to cache, can be designed
to enable download of program to initially
empty Flash PROM or other external memory.
• Power dissipation (outputs open): 350mW
typ., 610 mW max.
Operating Conditions
• Supply voltage: 3.0 - 3.6V
• Ambient temperature range: 0 - 70 °C.
For more information, visit:
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