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UP Xtreme Board {#up_xtreme}
================================
UP Xtreme is based on the Intel® Core™ i3/i5/i7 Whiskey Lake SoCs.
For the full specification please refer to the main specification page here:
https://up-board.org/wp-content/uploads/up-xtreme/Datasheet-UP-xtreme.pdf
Interface notes
-----------------------
The UP Xtreme present one Raspberry Pi compatible HAT connector and a 100 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
- 2 chip-selects
- To enable SPI device nodes the ACPI tables need to be overwritten as explained [here](https://wiki.up-community.org/Pinout_UP2#SPI_Ports)
**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/up_xtreme.c for details.
| MRAA no. | Function | Rpi GPIO | Sysfs GPIO | mraa device |
|----------|--------------|------------|------------|-----------------|
| 1 | 3V3 VCC | | | |
| 2 | 5V VCC | | | |
| 3 | I2C_SDA | 2 | 368 | I2C0 |
| 4 | 5V VCC | | | |
| 5 | I2C_SCL | 3 | 369 | I2C0 |
| 6 | GND | | | |
| 7 | GPIO(4) | 4 | 296 | |
| 8 | UART_TX | 14 | 469 | UART0 |
| 9 | GND | | | |
| 10 | UART_RX | 15 | 468 | UART0 |
| 11 | UART_RTS | 17 | 470 | UART0 |
| 12 | I2S_CLK | 18 | 360 | |
| 13 | GPIO(27) | 27 | 268 | |
| 14 | GND | | | |
| 15 | GPIO(22) | 22 | 270 | |
| 16 | GPIO(23) | 23 | 264 | |
| 17 | 3V3 VCC | | | |
| 18 | GPIO(24) | 24 | 265 | |
| 19 | SPI0_MOSI | 10 | 308 | SPI0 |
| 20 | GND | | | |
| 21 | SPI0_MISO | 9 | 307 | SPI0 |
| 22 | GPIO(25) | 25 | 266 | |
| 23 | SPI0_SCL | 11 | 306 | SPI0 |
| 24 | SPI0_CS0 | 8 | 305 | SPI0 |
| 25 | GND | | | |
| 26 | SPI0_CS1 | 7 | 311 | SPI0 |
| 27 | ID_SD | 0 | 366 | I2C1 |
| 28 | ID_SC | 1 | 367 | I2C1 |
| 29 | GPIO(5) | 5 | 317 | |
| 30 | GND | | | |
| 31 | GPIO(6) | 6 | 318 | |
| 32 | GPIO(12) | 12 | 298 | |
| 33 | GPIO(13) | 13 | 299 | |
| 34 | GND | | | |
| 35 | I2S_FRM | 19 | 261 | |
| 36 | UART_CTS | 16 | 471 | UART0 |
| 37 | GPIO(26) | 26 | 267 | |
| 38 | I2S_DIN | 20 | 363 | |
| 39 | GND | | | |
| 40 | I2S_DOUT | 21 | 362 | |
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