UP Squared is based on the Intel® Celeron™ N3350 or the Intel® Pentium™ N4200, formerly ApolloLake™.

For the full specification please refer to the main specification page here:

http://www.up-board.org/upsquared/specifications-up2

Interface notes

The Up Squared present one Raspberry Pi compatible HAT connector and a 60 pin exHAT connector. Currently this implementation only support the interfaces through the HAT connector.

I2C

• 2 channels
• Support: standard-mode (100kHz), fast-mode (400kHz), Fast-mode plus (1MHz), High-speed mode (3.4MHz)
• Bus frequency can be selected in BIOS settings
• The default i2c channel is the one connected to the pin 3,5 of the hat
• On some OSes the i2c-dev kernel module may need to be loaded manually to export the i2c device nodes

SPI

• Bus frequencies up to 10MHz are supported
• 3 chip-selects
• To enable SPI device nodes the ACPI tables need to be overwritten as explained here

PWM

• Up to 3 channel of PWM

UART

• 1 high-speed UART is available
• Supporting baud rates up to 3686400 baud
• Hardware flow-control signals are available on pins 11/36 (RTS/CTS)

Please note that a kernel with UP board support is required to enable the I/O interfaces above.

Refer to http://www.up-community.org for more information.

Pin Mapping

The GPIO numbering in the following pin mapping is based on the Raspberry Pi model 2 and B+ numbering scheme.

NOTE: the i2c device numbering depend on various factor and cannot be trusted: the right way of determining i2c (and other devices) numbering is through PCI physical device names. See the source code in src/x86/up2.c for details.