User manual
MediaTek LinkItâ„¢ Smart 7688 Developer's Guide
© 2015, 2016 MediaTek Inc.
Page 16
This document contains information that is proprietary to MediaTek Inc.
Unauthorized reproduction or disclosure of this information in whole or in part is strictly prohibited.
Category
Feature
Specification
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-bit
50kHz@2-bit
25kHz@3-bit
12.5kHz@4-bit
6.25kHz@5-bit
3.125kHz@6-bit
1.5625kHz@7-bit
(Standard mode)
40MHz@1-bit
20MHz@2-bit
10MHz@3-bit
5MHz@4-bit
2.5MHz@5-bit
1.25Mhz@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