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a7a3b39 Oct 7, 2017
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Linkit Smart 7688 {#linkit_7688}

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)

Pinout

Revision Support

  • Linkit Smart 7688
  • Linkit Smart 7688 Duo

Pin Mapping

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)