The Linkit Smart 7688 is based on the MediaTek MT7688 system on a chip, which includes a MIPS 24KEc 580 MHz processor and 128 megabytes of RAM.
Features:
- 20 GPIO pins
- 4 PWM pins
- 3 UART ports
- 1 SPI master port
- 1 SPI slave port (not supported by libmraa)
- 1 I2C port
- 1 I2S port (not supported by libmraa)
- Linkit Smart 7688
- Linkit Smart 7688 Duo
| MRAA Number | Physical Pin | Function |
|---|---|---|
| --- | P0 | (Reset) |
| 1 | P1 | GPIO43 (Eth LED) |
| --- | P2 | (Eth RD+) |
| --- | P3 | (Eth RD-) |
| --- | P4 | (Eth TD+) |
| --- | P5 | (Eth TD-) |
| --- | P6 | (USB D+) |
| --- | P7 | (USB D-) |
| 8 | P8 | GPIO20, UART TX2, PWM2 |
| 9 | P9 | GPIO21, UART RX2, PWM3 |
| --- | GND | GND |
| --- | 3V3 | 3V3 |
| --- | VCC | VCC |
| --- | 5V | 5V |
| 10 | P10 | GPIO2, (I2S WS) |
| 11 | P11 | GPIO3, (I2S CLK) |
| 12 | P12 | GPIO0, (I2S SDI) |
| 13 | P13 | GPIO1, (I2S SDO) |
| 14 | P14 | GPIO37 (REF_CLK) |
| 15 | P15 | GPIO44 (WiFi LED) |
| 16 | P16 | GPIO46, UART RX1 |
| 17 | P17 | GPIO45, UART TX1 |
| 18 | P18 | GPIO13, UART RX0 |
| 19 | P19 | GPIO12, UART TX0 |
| 20 | P20 | GPIO5, I2C SDA |
| 21 | P21 | GPIO4, I2C SCL |
| 22 | P22 | SPI MOSI |
| 23 | P23 | SPI MISO |
| 24 | P24 | SPI SCK |
| 25 | P25 | GPIO6, SPI CS |
| 26 | P26 | GPIO18, PWM0 |
| 27 | P27 | GPIO19, PWM1 |
| 28 | P28 | GPIO17, (SPIS MOSI) |
| 29 | P29 | GPIO16, (SPIS MISO) |
| 30 | P30 | GPIO15, (SPIS SCK) |
| 31 | P31 | GPIO14, (SPIS CS) |