UP Board is based on the Intel(R) Atom(TM) x5-Z83xx SoC (formerly Cherry Trail). It includes 2GB RAM, 16/32GB eMMC flash, 6 USB2.0 ports, 1 USB 3.0 OTG port, 1 Gigabit Ethernet, HDMI and DSI Graphics ports, RTC and a 40-pin I/O header. The form-factor for the board is based on the Raspberry Pi 2, and can be used with many of the add-on HAT boards designed for the Raspberry Pi 2.
PWM PWM frequency range is from 293 Hz to 6.4 MHz. 8-bit resolution is supported for duty-cycle adjustments, but this reduces for frequencies > 97.6kHz
I2C 2 I2C channels support standard-mode (100kHz) and fast-mode (400kHz). Bus frequency can be selected in BIOS settings. Note that, unlike Raspberry Pi, the I2C controller issues Repeated-START commands for combined transactions (e.g. a write-then-read transaction) which may not be supported by some I2C slave devices. For such devices, it is advisable to use separate write and read transactions to ensure that Repeated-STARTs are not issued.
SPI Bus frequencies up to 25MHz are supported, in steps which are less granular at higher speeds. E.g. Available speeds include: 25MHz, 12.5MHz, 8.33MHz, 6.25MHz, 5MHz, 4.167MHz, 3.571MHz, 3.125MHz, etc. Please be aware that speeds in between those steps will be rounded UP to the next nearest available speed, and capped at 25MHz. At the time of writing, only a single native chip-select is available (SPI CS0).
UART 2 high-speed UARTs are available, supporting baud rates up to support baud rates between 300 and 3686400. Hardware flow-control signals are not exposed, so software flow-control may be needed for rates above 115200. A console UART is also available but is not fully supported at this time.
The GPIO numbering in the following pin mapping is based on the Raspberry Pi model 2 and B+ numbering scheme.
Note that there is an enum to use wiringPi style numbers.
| MRAA Number | Physical Pin | Function | Sysfs GPIO | Notes |
|---|---|---|---|---|
| 1 | P1-01 | 3V3 VCC | ||
| 2 | P1-02 | 5V VCC | ||
| 3 | P1-03 | I2C SDA1 | 2 | I2C1 (/dev/i2c-1) |
| 4 | P1-04 | 5V VCC | ||
| 5 | P1-05 | I2C SCL1 | 3 | I2C1 (/dev/i2c-1) |
| 6 | P1-06 | GND | ||
| 7 | P1-07 | GPIO(4) | 4 | |
| 8 | P1-08 | UART TX1 | 14 | UART1 (/dev/ttyS1) |
| 9 | P1-09 | GND | ||
| 10 | P1-10 | UART RX1 | 15 | UART1 (/dev/ttyS1) |
| 11 | P1-11 | GPIO(17) | 17 | |
| 12 | P1-12 | I2S CLK | 18 | I2S0 (PCM Audio) |
| 13 | P1-13 | UART RX2 | 27 | UART2 (/dev/ttyS2) |
| 14 | P1-14 | GND | ||
| 15 | P1-15 | GPIO(22) | 22 | |
| 16 | P1-16 | GPIO(23) | 23 | |
| 17 | P1-17 | 3V3 VCC | ||
| 18 | P1-18 | GPIO(24) | 24 | |
| 19 | P1-19 | SPI MOSI | 10 | SPI2 (/dev/spidev2.x) |
| 20 | P1-20 | GND | ||
| 21 | P1-21 | SPI MISO | 9 | SPI2 (/dev/spidev2.x) |
| 22 | P1-22 | UART TX2 | 25 | UART2 (/dev/ttyS2) |
| 23 | P1-23 | SPI SCL | 11 | SPI2 (/dev/spidev2.x) |
| 24 | P1-24 | SPI CS0 | 8 | SPI2 (/dev/spidev2.0) |
| 25 | P1-25 | GND | ||
| 26 | P1-26 | SPI CS1 | 7 | SPI2 (/dev/spidev2.1) |
| 27 | P1-27 | I2C SDA0 | 0 | I2C0 (/dev/i2c-0) |
| 28 | P1-28 | I2C SCL0 | 1 | I2C0 (/dev/i2c-0) |
| 29 | P1-29 | GPIO(5) | 5 | |
| 30 | P1-30 | GND | ||
| 31 | P1-31 | GPIO(6) | 6 | |
| 32 | P1-32 | PWM0 | 12 | PWM Chip 0 Channel 0 |
| 33 | P1-33 | PWM1 | 13 | PWM Chip 1 Channel 0 |
| 34 | P1-34 | GND | ||
| 35 | P1-35 | I2S FRM | 19 | I2S0 (PCM Audio) |
| 36 | P1-36 | GPIO(16) | 16 | |
| 37 | P1-37 | GPIO(26) | 26 | |
| 38 | P1-38 | I2S DIN | 20 | I2S0 (PCM Audio) |
| 39 | P1-39 | GND | ||
| 40 | P1-40 | I2S DOUT | 21 | I2S0 (PCM Audio) |