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The Linklt Smart 7688 development platform offers two developments boards:
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Linklt Smart 7688: MPU only. Powered by Media Tek MT7688.
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Linklt Smart 7688 Duo: MPU and MCU. Powered by Media Tek MT7688 and ATmega 32U4.
LinkIt Smart 7688 is an open development board which is based on OpenWrt Linux distribution and MT7688. The board is designed especially to enable the prototyping of Rich IoT Application for Smart Home. The board offers you the memory and packet storage to enable robust video processing. The platform also offers options to create device applications in Python, Node.js and C programming language.
LinkIt Smart 7688 is a co-design product by Seeed Studio and MediaTek. It brings together the parties' knowledge in open hardware and industry leading reference designs for IoT devices to create this powerful development board.
LinkIt Smart 7688 is fully supported on the MediaTek Labs site: check out the LinkIt sectionandregister here to download the SDK, participate in the Forums, and more.
Note (important)
In order to protect the product from improper operation, please pay attention to below notes.
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Choose more reliable power adapter with stable output.
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Recommended conditions of power input source for 7688:
1. Overshoot voltage of power input should not over 5.5.
2. Voltage wave should be within ±100mV of rated voltage.
Features
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Single input single output(1T1R) Wi-Fi 802.11 b/g/n.
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Pin-out for GPIO, I2C, I2S, SPI, UART, PWM and Ethernet Port.
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580 MHz MIPS CPU.
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32MB flash and 128MB DDR2 RAM.
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USB host.
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Micro SD slot.
Technical Details
Dimensions 56mm x 26mm x 18mm Weight G.W 13g Battery Exclude MPU Chipset MT7688AN Core MIPS24KEc Clock speed 580MHz Working voltage 3.3V PCB Size Dimensions 55.7 x 26 mm Memory Flash 32MB RAM 128MB DDR2 Power Source USB Power 5V (USB micro-B) VCC 3.3V (Pin Breakout) GPIO Pin Count 22 (MT7688AN) Voltage 3.3V PWM Pin Count 4 (MT7688AN) Voltage 3.3V Max. Resolution 7 bits (customizable) Maximum Frequency@Resolution 100kHz@1-bit50kHz@2-bit / 25kHz@3-bit 12.5kHz@4-bit / 6.25kHz@5-bit3.125kHz@6-bit / 1.5625kHz@7-bit (Standard mode) Maximum Frequency@Resolution 40MHz@1-bit20MHz@2-bit / 10MHz@3-bit 5MHz@4-bit / 2.5MHz@5-bit1.25Mhz@6-bit / 625kHz@7-bit (Fast mode) External Interrupts Pin Count 22 (MT7688AN) SPI Set count 1 (MT7688AN) Pin numbers P22, P23,P24 (Shared with on-board flash), P25 Max. Speed 25 MHz SPI Slave Set count 1 (MT7688AN) Pin numbers P28, P29, P30, P31 Max. Speed 25 MHz I2S Set count 1 (MT7688AN) Pin numbers P10, P11, P12, P13 I2C Set count 1 Pin numbers P20, P21 Speed 120K/400K UART Lite Set count 3 (MT7688AN) Pin numbers P8, P9, P16, P17, P18, P19 Max. Speed 0.5Mbps USB Host Set count 1 (MT7688AN) Pin numbers P6, P7 Speed Micro-AB Communication Wi-Fi 1T1R 802.11 b/g/n (2.4G) Ethernet 1-port 10/100 FE PHY Pin numbers P2, P3, P4, P5 User Storage SD Card Micro SDSDXC 
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