Atmel Evaluation Kit AT91SAM9X25-EK AT91SAM9X25-EK Data Sheet

11115A–ATARM–27-Jul-11

The CM Board is equipped with an Atmel ARM-based embedded MPU, as listed below, in a 217-ball 
BGA package. The five devices share an identical footprint. All five share the same CM Board PCB with 
minor configuration differences. 

The five devices are:

„

SAM9G15

„

SAM9G25

„

SAM9G35

„

SAM9X25

„

SAM9X35

As different interfaces can be defined using the same pins, it depends on the actual configuration of the 
CPU as to which functions are in fact available to the EK board.

 for details. The processor runs at a nominal frequency of 

400 MHz for the core and 133 MHz for the system bus.

The peripheral configuration possibilities and implementation requirements of the CM are dependent on 
the module's chipset. Two configuration resistors are implemented on board in order to select the mode 
of configuration.

The CM includes 3 clock sources:

„

Two are alternatives for the processor main clock

„

One crystal and one crystal oscillator are used for the Ethernet MII/RMII chip

 

The reset sources for the CM board are:

„

Power on reset

„

Push button reset (Push button is equipped on EK board)

„

JTAG reset from an in-circuit emulator (JTAG interface is equipped on EK board)

Table 4-3. Main Components Associated with the Clock Systems

1

Crystal for Internal Clock, 12 MHz

Y1

1

Crystal for RTC Clock, 32.768 kHz

Y2

1

Oscillator for Ethernet Clock RMII, 50 MHz

Y3