The ETRAX CRIS
is a series of CPUs
designed and manufactured by Axis Communications
for use in embedded systems
The name is an acronym
of the chip's features: Ethernet
, Token Ring
is - C
ode Reduced Instruction Set
. Token ring support has been taken out from the latest chips as it has become obsolete.
Types of chips
The TGA-1, developed in 1986, was a communications transceiver for the AS400
The CGA-1 was just a performance improvement over the TGA-1.
In 1993, by introducing 10 MBit Ethernet and Token Ring controllers, the name ETRAX was born.
The ETRAX-4 had improved performance than previous models, along with a SCSI
The ETRAX 100 features a 10/100 MBit Ethernet Controller (hence the name), along with ATA
and Wide SCSI
In the year 2000, the ETRAX 100LX design added an MMU, as well as USB, synchronous serial and SDRAM support, and boosted the CPU performance up to 100 MIPS. Unlike devices with no MMU, it can run a Linux kernel with no modifications to the Linux memory management code.
- A 32 bit RISC CPU core
- 10/100 MBit Ethernet controller
- 4 asynchronous serial ports
- 2 synchronous serial ports
- 2 USB ports
- 2 Parallel ports
- 4 ATA (IDE) ports
- 2 Narrow SCSI ports (or 1 Wide)
- Support for SDRAM, Flash, EEPROM, SRAM
The device comes in a 256-pin Plastic Ball Grid Array package and uses 350 mW power (typical).
See also: http://www.axis.com/products/dev_etrax_100lx/index.htm
ETRAX 100LX MCM
is an ETRAX 100LX plus flash memory
, and an ethernet PHYceiver
. There were two versions commercialized: the ETRAX 100LX MCM 2+8 (2 MB flash, 8 MB SDRAM), and the ETRAX MCM 4-16 (4 MB flash, 16 MB SDRAM).
See also: http://www.axis.com/products/dev_etrax_100lx_mcm/index.htm
Designed in 2005, and with full Linux 2.6 support, this chip features:
- A 200 MIPS, 32-bit RISC with 5 stage pipeline CRIS CPU core with 16 kB data and 16 kB instruction cache and a MMU.
- Two 10/100 Ethernet controllers
- Crypto accelerator, supporting AES, DES, 3DES, SHA-1 and MD5.
- 128 kB on-chip RAM
- A microprogrammable I/O processor, supporting PC-Card, CardBus, PCI, USB FS/HS host, USB FS device, SCSI and ATA.
The device comes in a 256-pin Plastic Ball Grid Array package and uses 465 mW power (typical).
See also: http://www.axis.com/products/dev_etrax_fs/index.htm
A Linux-based cross compiler is provided by Axis and can be downloaded from their website
along with a range of sample applications. Pre-compiled images are also available.
Several hardware manufacturers offer 'developer boards': a circuit board featuring an ETRAX chip and all the necessary I/O ports to develop (or even deploy) applications. These include:
See also: http://developer.axis.com/old/showroom/index.html
SDK, how-tos, sample applications: http://www.acmesystems.it/?id=14