TM
LinkIt Smart 7688 Duo
GND
POWER
CONTROL
DIGITAL PIN
ANALOG PIN
PWM PIN
SERIAL PIN
CHIP PIN NAME
Connected to MT7688
Chip Antenna
MPU EJTAG
(on the bottom side)
I-PEX Connector (require HW rework)
This is a bootstrap pin for MT7688. Make sure it's pull-low
at power on, or the system will fail to boot up normally.
MPU RESET
Requires a regulated 3.3V,
if a higher voltage is used,
the board will be damaged.
ADC
ADC
ADC
ADC
ADC
ADC
EPHY LED
ETHY RD+
ETHY RD-
ETHY TD+
ETHY TD-
USB D+
USB D-
UART TX2
UART RX2
GND
3V3
VCC
5V
GPIO 43
GPIO 20
GPIO 21
D18
D19
D20
D21
D22
D23
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
PF0
PF1
PF4
PF5
PF6
PF7
P0
P1
P2
MT7688
P3
P4
P5
P6
P7
P8
P9
GND
3V3
VCC
5V
ATmega32U4
A0
A1
A2
A3
MPU
A4
USB HOST PWR/MCU
A5
WiFi MCU
ON
WiFi
USB Host USB Power &
MPU Reset Button
Wi-Fi Reset Button
Wi-Fi Reset Button
S0
S1
S2
S3
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
D13
RST
AREF
MCU USB Port
PB3
PB2
PB1
PB0
PD2
PD3
PD1
PD0
PD4
PC6
PD7
ATmega32U4
PE6
PB4
PB5
PB6
PB7
PD6
PC7
RST
AREF
microSD Slot (on the bottom side)
D14
D15
D16
D17
D0
D1
D2
D3
D4
D5
D6
D7
D8
D9
D10
D11
D12
D13
EINT
EINT
EINT
EINT
EINT
EINT
EINT
EINT
MCU RESET
MISO
MOSI
SCLK
SS
UART RX
UART TX
GPIO 17
GPIO 16
GPIO 15
GPIO 14
UART_TXD0
UART_RXD0
SDA
SCL
PWM
ADC
PWM
ADC
PWM
GPIO 0
ADC
ADC
ADC
PWM
PWM
PWM
ADC
PWM
PWM
D13 LED
GPIO 3
AREF
CPU
RAM
Flash
Wi-Fi
Ethernet
SD
USB
MIPS 24KEc 580MHz
128MB
32 MB
1T1R 802.11 b/g/n (2.4G)
10/100Mbps
SD-XC
USB 2.0 Host
MCU ATmega32U4 8MHz
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