Datasheet

LinkIt Smart 7688 Duo
TM
GND
POWER
CONTROL
DIGITAL PIN
ANALOG PIN
PWM PIN
SERIAL PIN
CHIP PIN NAME
Connected to MT7688
CPU
USB
SD
Ethernet
Wi-Fi
Flash
RAM
MIPS 24KEc 580MHz
USB 2.0 Host
SD-XC
MCU ATmega32U4 8MHz
10/100Mbps
1T1R 802.11 b/g/n (2.4G)
32 MB
128MB
ON
WiFi
USB HOST PWR/MCU
MPU
WiFi MCU
P1
A3
A2
5V
VCC
P9
P8
P5
P4
P0
A1
A5
A4
A0
GND
3V3
P7
P6
P3
P2
S1
D13
D12
D9
D8
D5
D4
D1
D0
S0
D11
AREF
RST
D10
D6
D7
D3
D2
S3
S2
D13
MPU EJTAG
(on the bottom side)
USB Host USB Power &
MCU USB Port
Wi-Fi Reset Button
MPU Reset Button
Wi-Fi Reset Button
I-PEX Connector (require HW rework)
D10
D11
D12
D13
D1
D0
D3
D2
D5
D4
D6
D7
D8
D9
EINT
EINT
EINT
EINT
D14
D15
D16
D17
EINT
EINT
EINT
EINT
MCU RESET
PB3
PC6
PB2
PB1
PB0
PD2
PD3
PD1
PD0
PD4
PB5
PD7
PE6
PB4
PB6
PB7
PD6
PC7
RST
AREF
microSD Slot (on the bottom side)
MISO
MOSI
SCLK
SS
UART RX
UART TX
D13 LED
GPIO 17
GPIO 16
UART_TXD0
GPIO 14
GPIO 15
UART_RXD0
GPIO 3
GPIO 0
SDA
SCL
ADC
ADC
ADC
ADC
ADC
ADC
AREF
PWM
PWM
PWM
PWM
PWM
PWM
PWM
PWM
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.
ATmega32U4
Chip Antenna
MPU RESET
ADC
ADC
ADC
ADC
ADC
ADC
PORST_N
UART_RXD2
EPHY_LED0_N
MDI_RP_P0
MDI_RN_P0
MDI_TP_P0
MDI_TN_P0
USB_DP
USB_DM
UART_TXD2
PF0
PF1
PF4
PF5
PF6
PF7
D18
D19
D20
D21
GPIO 43
GPIO 20
GPIO 21
D22
D23
EPHY LED
ETHY RD+
ETHY RD-
ETHY TD+
ETHY TD-
USB D+
USB D-
UART TX2
UART RX2
GND
3V3
VCC
5V
Requires a regulated 3.3V,
if a higher voltage is used,
the board will be damaged.
MT7688
ATmega32U4