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|Target Device||Atmel SAM4L|
|Target Architecture||ARM Cortex M4|
|Design Files||OSH Park PCBs|
|Supported Apps||Simple Serial Enc/Auth|
This board supports the Atmel SAM4L microcontroller. The default build has the Atmel ATSAM4LC2AA-AU, which has 128KB flash and 32KB SRAM.
The Atmel SAM4L has an internal 1.8V regulator. This regulator is not used in the board, instead power for the core is supplied by an external LDO on the UFO board. Be sure to enable the 1.8V and 3.3V regulators on the UFO board for the SAM4L board to function.
The SAM4L has a hardware AES module, with optional countermeasures that can be enabled. These countermeasures are described in the SAM4L datasheet as the following options:
- Type 1: Randomly add one cycle to data processing
- Type 2: Randomly add one cycle to data processing (other version)
- Type 3: Add a random number of clock cycles to data processing, subject to a maximum of 11 clock cycles for key size of 128 bits
- Type 4: Add random spurious power consumption during data processing
Interestingly they can be individually enabled/disabled. This makes the SAM4L a useful training target for power analysis attacks against various hardware countermeasures.
An external programmer is needed for this target. The SAM4L has an internal bootloader you can use via an external serial port, which is not yet supported directly by the ChipWhisperer-Capture software.
See GIT Repo for PDF of schematic.
See GIT Repo for gerber files.