2016-02-24 14:25:54 +00:00
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UP Board {#up}
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============
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2016-11-18 12:12:08 +00:00
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UP Board is based on the Intel(R) Atom(TM) x5-Z8350 SoC (formerly Cherry Trail).
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It includes 1/2/4GB RAM, 16/32/64GB eMMC flash, 6 USB2.0 ports, 1 USB 3.0 OTG
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port, 1 Gigabit Ethernet, HDMI and DSI/eDP Graphics ports, RTC and a 40-pin I/O
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header. The form-factor for the board is based on the Raspberry Pi 2, and can be
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used with many of the add-on HAT boards designed for the Raspberry Pi.
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2016-02-24 14:25:54 +00:00
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Interface notes
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---------------
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**PWM** PWM frequency range is from 293 Hz to 6.4 MHz. 8-bit resolution is
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supported for duty-cycle adjustments, but this reduces for frequencies > 97.6kHz
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**I2C** 2 I2C channels support standard-mode (100kHz) and fast-mode (400kHz).
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Bus frequency can be selected in BIOS settings. Note that, unlike Raspberry Pi,
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the I2C controller issues Repeated-START commands for combined transactions
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(e.g. a write-then-read transaction) which may not be supported by some I2C
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slave devices. For such devices, it is advisable to use separate write and
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read transactions to ensure that Repeated-STARTs are not issued.
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**SPI** Bus frequencies up to 25MHz are supported, in steps which are less
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granular at higher speeds. E.g. Available speeds include:
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25MHz, 12.5MHz, 8.33MHz, 6.25MHz, 5MHz, 4.167MHz, 3.571MHz, 3.125MHz, etc.
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Please be aware that speeds in between those steps will be rounded UP to the
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next nearest available speed, and capped at 25MHz.
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2016-11-18 12:12:08 +00:00
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2 chip-selects are available, one natively (SPI CS0) and one by GPIO (SPI CS1).
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2016-02-24 14:25:54 +00:00
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2016-11-18 12:12:08 +00:00
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**UART** 1 high-speed UART is available, supporting baud rates between 300 and
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3686400. Hardware flow-control signals are available on pins 11/36 (RTS/CTS).
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**ADC** 1 8-bit single-channel ADC (TI ADC081C021) is available on pin 7.
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Please note that a kernel with UP board support is required to enable the I/O
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interfaces above. Refer to https://up-community.org for more information.
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2016-02-24 14:25:54 +00:00
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Pin Mapping
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-----------
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The GPIO numbering in the following pin mapping is based on the Raspberry Pi
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model 2 and B+ numbering scheme.
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Note that there is an enum to use wiringPi style numbers.
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| MRAA Number | Physical Pin | Function | Sysfs GPIO | Notes |
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|-------------|--------------|----------|------------|----------------------|
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| 1 | P1-01 | 3V3 VCC | | |
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| 2 | P1-02 | 5V VCC | | |
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| 3 | P1-03 | I2C SDA1 | 2 | I2C1 (/dev/i2c-1) |
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| 4 | P1-04 | 5V VCC | | |
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| 5 | P1-05 | I2C SCL1 | 3 | I2C1 (/dev/i2c-1) |
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| 6 | P1-06 | GND | | |
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| 7 | P1-07 | GPIO(4) | 4 | ADC0 (iio:device0) |
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| 8 | P1-08 | UART TX1 | 14 | UART1 (/dev/ttyS1) |
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| 9 | P1-09 | GND | | |
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| 10 | P1-10 | UART RX1 | 15 | UART1 (/dev/ttyS1) |
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| 11 | P1-11 | GPIO(17) | 17 | |
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| 12 | P1-12 | I2S CLK | 18 | I2S0 (PCM Audio) |
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| 13 | P1-13 | GPIO(27) | 27 | |
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| 14 | P1-14 | GND | | |
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| 15 | P1-15 | GPIO(22) | 22 | |
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| 16 | P1-16 | GPIO(23) | 23 | |
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| 17 | P1-17 | 3V3 VCC | | |
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| 18 | P1-18 | GPIO(24) | 24 | |
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| 19 | P1-19 | SPI MOSI | 10 | SPI2 (/dev/spidev2.x)|
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| 20 | P1-20 | GND | | |
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| 21 | P1-21 | SPI MISO | 9 | SPI2 (/dev/spidev2.x)|
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| 22 | P1-22 | GPIO(25) | 25 | |
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| 23 | P1-23 | SPI SCL | 11 | SPI2 (/dev/spidev2.x)|
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| 24 | P1-24 | SPI CS0 | 8 | SPI2 (/dev/spidev2.0)|
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| 25 | P1-25 | GND | | |
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| 26 | P1-26 | SPI CS1 | 7 | SPI2 (/dev/spidev2.1)|
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| 27 | P1-27 | I2C SDA0 | 0 | I2C0 (/dev/i2c-0) |
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| 28 | P1-28 | I2C SCL0 | 1 | I2C0 (/dev/i2c-0) |
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| 29 | P1-29 | GPIO(5) | 5 | |
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| 30 | P1-30 | GND | | |
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| 31 | P1-31 | GPIO(6) | 6 | |
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| 32 | P1-32 | PWM0 | 12 | PWM Chip 0 Channel 0 |
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| 33 | P1-33 | PWM1 | 13 | PWM Chip 1 Channel 0 |
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| 34 | P1-34 | GND | | |
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| 35 | P1-35 | I2S FRM | 19 | I2S0 (PCM Audio) |
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| 36 | P1-36 | GPIO(16) | 16 | |
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| 37 | P1-37 | GPIO(26) | 26 | |
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| 38 | P1-38 | I2S DIN | 20 | I2S0 (PCM Audio) |
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| 39 | P1-39 | GND | | |
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| 40 | P1-40 | I2S DOUT | 21 | I2S0 (PCM Audio) |
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