Hardware Interface Description
Interface overview
Section titled “Interface overview”
40-PIN GPIO
Section titled “40-PIN GPIO”GPIO voltage
Section titled “GPIO voltage”| GPIO | Voltage | Max |
|---|---|---|
| All GPIO | 3.3V | 3.3V |
GPIO Interface
Section titled “GPIO Interface”The XpressReal T3 provides a 40 pin GPIO header that is compatible with most peer accessories on the market.
| Function2 | Function1 | Pin# | Pin# | Function1 | Function2 |
|---|---|---|---|---|---|
| +3.3V | 1 | 2 | +5.0V | ||
| I2C5_SDA | I2C7_SDA | 3 | 4 | +5.0V | |
| I2C5_SCL | I2C7_SCL | 5 | 6 | GND | |
| TP0_DATA0 | GPIO2_B3 | 7 | 8 | GPIO4_C3 | UARTO_TX |
| GND | 9 | 10 | GPIO4_C4 | UARTO_RX | |
| TP0_DATA1 | GPIO4_C2 | 11 | 12 | GPIO4_A3 | TP0_SYNC |
| TP0_DATA2 | GPIO4_C6 | 13 | 14 | GND | |
| TP0_DATA3 | GPIO4_D0 | 15 | 16 | GPIO4_D2 | TP0_VALID |
| +3.3V | 17 | 18 | GPIO4_D4 | TP0_CLK | |
| GSPI_MOSI | GPIO1_B0 | 19 | 20 | GND | |
| GSPI_MISO | GPIO1_A7 | 21 | 22 | GPIO4_D5 | IR_RX |
| GSPI_SCK | GPIO1_B1 | 23 | 24 | GPIO4_B2 | GSPI_CS |
| GND | 25 | 26 | ADC_IN0 | SPDIF_IN | |
| I2C3_SDA | GPIO2_A0 | 27 | 28 | GPIO2_A1 | I2C3_SCL |
| TP0_DATA4 | GPIO2_B2 | 29 | 30 | GND | |
| TP0_DATA4 | GPIO2_B1 | 31 | 32 | GPIO3_C0 | VDAC_VO |
| TP0_DATA4 | GPIO2_B4 | 33 | 34 | GND | |
| TP0_DATA4 | GPIO4_A5 | 35 | 36 | GPIO4_A4 | SPDIF_OUT |
| GPIO_22 | GPIO4_D6 | 37 | 38 | GPIO4_A6 | ADAC_AOR |
| GND | 39 | 40 | GPIO4_A7 | ADAC_AOL |
UART Serial Console
Section titled “UART Serial Console”Using an USB to TTL converter to connect to the serial port of XpressReal T3.
| XpressReal T3 SBC | Connection | Serial Cable |
|---|---|---|
| GND (pin 6) | <---> | GND |
| TX (pin 8) | <---> | RX |
| RX (pin 10) | <---> | TX |