The AT91SAM9G20B-CU is a SMART Embedded Microprocessor unit based on the integration of an ARM926EJ-S processor with fast ROM and RAM memories and a wide range of peripherals. The SAM9G20 embeds an Ethernet MAC, one USB device port and a dual port USB host controller with on-chip USB transceivers. It also integrates several standard peripherals, such as the USART, SPI, TWI, Timer counters, Synchronous Serial Controller, ADC and MultiMedia card Interface. The SAM9G20 is architectured on a 6-layer matrix, allowing a maximum internal bandwidth of six 32-bit buses. It also features an External bus interface capable of interfacing with a wide range of memory devices. The SAM9G20 is an enhancement of the SAM9260 with the same peripheral features. It is pin-to-pin compatible with the exception of power supply pins. Speed is increased to reach 400MHz on the ARM core and 133MHz on the system bus and EBI.
Incorporates the ARM926EJ-S ARM Thumb processor
One 64kB Internal ROM, single-cycle access at maximum matrix speed
Two 16kB internal SRAM, single-cycle access at maximum matrix speed
External bus interface (EBI)
USB 2.0 full speed (12Mbps) device port
USB 2.0 full speed (12Mbps) host double port
Ethernet MAC 10/100 Base T
Image sensor interface
Bus matrix
Reset controller (RSTC)
Clock generator (CKGR)
Power management controller (PMC)
Advanced interrupt controller (AIC)
Debug unit (DBGU)
Periodic interval timer (PIT)
Watchdog timer
Real-time timer (RTT)
One 4-channel 10-bit Analog-to-digital converter
Three 32-bit Parallel I/O controllers (PIOA, PIOB, PIOC)
