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Linux SBC · SBC
Libre Computer Alta
Amlogic A311D board in the Raspberry Pi form factor with a 40-pin header.
- GPIO
- I2C
- SPI
- UART
- PWM
- USB
- Ethernet
- Processor
- Amlogic A311D (4× A73, 2× A53)
- Logic
- 3.3 V GPIO
- Power
- 5 V micro-USB or USB-C, GPIO header
- Format
- Raspberry Pi-style credit-card layout
Before you wire
3 cautions- Pins do not match a Raspberry Pi function for function; verify the board schematic before using a Pi HAT.
- GPIO is not stated as 5 V tolerant; keep it at 3.3 V.
- Alternate functions need the matching device-tree overlay.
Pin map
Connector
7J1 40-pin GPIO header
Component side up, 40-pin GPIO header along the top edge
Simplified technical illustration. Pin data is source-backed; verify against the linked documentation before wiring.
Pin
Hover, tap, or arrow to a pad to inspect it.
- Taken row by row from Libre Computer's libretech-wiring-tool gpio.map for this board, and matched on all 40 pins against Libre Computer's schematic-derived GPIO sheet.
- GPIO on this header is 3.3 V; SARADC inputs are 1.8 V.
- Alternate functions need the matching device-tree overlay.
All 40 pins (table)
| # | Signal | Role | Net | Also / notes |
|---|---|---|---|---|
| 1 | Power | 3V3 | ||
| 3 | I2C | I2C | I2C_AO_M0_SDA / UART_AO_B_RX / I2C_AO_S0_SDA | |
| 5 | I2C | I2C | I2C_AO_M0_SCL / UART_AO_B_TX / I2C_AO_S0_SCL | |
| 7 | GPIO | PWMAO_C | ||
| 9 | Ground | GND | ||
| 11 | GPIO | |||
| 13 | GPIO | |||
| 15 | GPIO | |||
| 17 | Power | 3V3 | ||
| 19 | SPI | SPI | UART_EE_C_RTS / SPI_B_MOSI | |
| 21 | SPI | SPI | UART_EE_C_CTS / SPI_B_MISO / PWM_F | |
| 23 | SPI | SPI | UART_EE_C_TX / SPI_B_SCLK / I2C_EE_M1_SCL / PWM_B | |
| 25 | Ground | GND | ||
| 27 | I2C | I2C | I2C_EE_M2_SDA | |
| 29 | GPIO | |||
| 31 | GPIO | |||
| 33 | GPIO | PWM_C | ||
| 35 | GPIO | SPI_A_SS0 / I2C_EE_M1_SDA | ||
| 37 | GPIO | |||
| 39 | Ground | GND | ||
| 2 | Power | 5V | ||
| 4 | Power | 5V | ||
| 6 | Ground | GND | ||
| 8 | GPIO | UART_AO_B_TX | ||
| 10 | GPIO | UART_AO_B_RX | ||
| 12 | GPIO | SPI_A_SCLK / I2C_EE_M1_SCL | ||
| 14 | Ground | GND | ||
| 16 | GPIO | PWM_D | ||
| 18 | GPIO | |||
| 20 | Ground | GND | ||
| 22 | GPIO | |||
| 24 | SPI | SPI | UART_EE_C_RX / SPI_B_SS0 / I2C_EE_M1_SDA | |
| 26 | GPIO | |||
| 28 | I2C | I2C | I2C_EE_M2_SCL | |
| 30 | Ground | GND | ||
| 32 | GPIO | PWM_F | ||
| 34 | Ground | GND | ||
| 36 | GPIO | |||
| 38 | GPIO | SPI_A_MOSI / PWM_C | ||
| 40 | GPIO | SPI_A_MISO |
Source references
Why it matters
- Header table published as a machine-readable map by the vendor.