"The board's processor, a 180 MHz Atmel AT91RM9200
system-on-chip, integrates an ARM9 CPU core (with MMU) along with
controllers for USB host and device ports, 10/100 Ethernet, MMC/SD
card interface, sync/async serial ports, SPI (serial peripheral
interface), and more.
"Thomas was careful to keep the Linuxstamp's design simple
enough to allow for a two-layer PCB design, which minimizes costs
and simplifies homebrew construction."