TM
LinkIt Smart 7688
GND
POWER
CONTROL
DIGITAL PIN
PWM PIN
SERIAL PIN
CHIP PIN NAME
MPU EJTAG
(on the bottom side)
MPU RESET
PWM2
PWM3
Requires a regulated 3.3V, if a
higher voltage is used,the board
will be damaged.
EPHY LED
ETHY RD+
ETHY RD-
ETHY TD+
ETHY TD-
USB D+
USB D-
UART TX2
UART RX2
GND
3V3
VCC
5V
I2S WS
I2S CLK
I2S SDI
I2S SDO
GPIO 43
GPIO 20
GPIO 21
GPIO 2
GPIO 3
GPIO 0
GPIO 1
Chip Antenna
PORST_N
EPHY_LED0_N
MDI_RP_P0
MDI_RN_P0
MDI_TP_P0
MDI_TN_P0
USB_DP
USB_DM
UART_TXD2
UART_RXD2
I2S_WS
I2S_CLK
I2S_SDI
I2S_SDO
P0
P1
P2
P3
P4
P5
P6
P7
P8
P9
GND
3V3
VCC
5V
P10
MPU
P11
P12
HOST PWR
P13
ON
WiFi
USB Host USB Power
MPU Reset Button
Wi-Fi Reset Button
WiFi
P14
P15
P16
P17
P18
P19
P20
P21
P22
P23
P24
P25
P26
P27
P28
P29
P30
P31
I-PEX Connector (require HW rework)
REF_CLKO
WLED_N
UART_RXD1
UART_TXD1
UART_RXD0
UART_TXD0
I2C_SD
I2C_SCLK
GPIO 37
GPIO 44
GPIO 46
GPIO 45
GPIO 13
GPIO 12
GPIO 5
GPIO 4
SPI_MOSI
SPI_MISO
SPI_CLK
SPI_CS1
MDI_RP_P2
MDI_RN_P2
MDI_RN_P1
MDI_RP_P1
MDI_TN_P1
MDI_TP_P1
GPIO 6
GPIO 18
GPIO 19
GPIO 17
GPIO 16
GPIO 15
GPIO 14
microSD Slot (on the bottom side)
UART RX1
UART TX1
UART RX0
UART TX0
I2C SDA
I2C SCL
SPI MOSI
SPI MISO
SPI SCK
SPI CS
SPIS MOSI
SPIS MISO
SPIS SCK
SPIS CS
CPU
RAM
Flash
Wi-Fi
Ethernet
SD
USB
REF_CLK
Wi-Fi LED
These pins are also connected to
the on-board flash. Be mindful when
you perform operations with them,
or the flash may be inaccessible.
PWM0
PWM1
MIPS 24KEc 580MHz
128MB
32 MB
1T1R 802.11 b/g/n (2.4G)
10/100Mbps
SD-XC
USB 2.0 Host
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