LinkIt™ Assist 2502

Overview

MediaTek LinkIt™ Assist 2502 development platform offers device developers a professional environment in which to design and prototype the software and hardware for Wearable and Internet of Things (IoT) devices.

The platform is based around the world’s smallest commercial System-on-Chip (SoC) for Wearable, MediaTek MT2502A. This SoC also works with MediaTek’s energy efficient Wi-Fi and GNSS companion chipsets. This means it’s now easier than ever to create devices that connect to other smart devices or to cloud applications and services directly.

LinkIt Assist 2502 development platform runs on top of the MT2502A and, when used, its companion GNSS and Wi-Fi chipsets, along with LCM CTP, Memory LCD and OLED screen (swappable). The LinkIt firmware is based on an RTOS kernel. On top of this kernel is a set of drivers, middleware and protocol stacks that expose the features of the chipsets and displays to a framework. A runtime environment then exposes features of the framework to a C-based API used to develop software with the LinkIt Assist 2502 SDK 2.0.

Key features

A C-based API, to access and control the hardware features of the MT2502A SoC and connected peripheral hardware
API calls to update software and firmware, offering the option to implement FOTA for devices
Comprehensive communications, media and UI capabilities, with support for:

GSM, GPRS and Bluetooth 2.1 and 4.0 (from the MT2502A)
Wi-Fi and GNSS (from companion chipsets)
MP3/ AAC audio
JPEG decode, vector fonts (powered by Etrump) and more

HDK

LinkIt Assist 2502

Co-designed with Seeed Studio. This high performance, open source development board incorporates the LinkIt Assist 2502 module combined with modules for high performance Wi-Fi and GNSS. A full set of pin-outs are provided for connecting peripheral hardware and the display is swappable.

This gives you access to a full range of communication and location acquisition features in a single board.

Key features

Supports GSM, GPRS, Bluetooth (2.1 SPP and 4.0 GATT profiles), Wi-Fi, GNSS (GPS, GLONASS and BeiDou) and audio out
Pin-out for Digital IO, Analog IO, PWM, I2C, SPI, UART and power supply
Swappable display modules (square LCM CTP included; round LCM CTP, Memory LCD and OLED display modules planned)
Open source hardware reference design, including schematic, layouts and pin details

Downloads

Development board specifications

Category	Feature	Spec
Microcontroller Module	Module Name Chipset Core Clock Speed	AcSiP AI2502S05 MT2502A (Aster) ARM7EJ-S™ 260MHz
Wi-Fi Module	Module Name Chipset	AcSiP CW01S MT5931
GPS Module	Module Name Chipset	AcSiP CW03S MT3332
PCB Size	Dimensions	53 x 53 mm (2.1 x 2.1 inches)
Memory	Flash RAM	16MB 4MB
Power	Battery Jack Charger	3.7~4.2V Li-ion battery Micro USB
Digital IO Pins	Pin Count Voltage	14 2.8V
Analog Input Pins	Pin Count Voltage	4 0~2.8V*
PWM Output Pins	Pin Count Voltage	2 2.8V
External Interrupts	Pin Count Voltage	4 2.8V
I2C (master only)	Set Count Speed	1 (SDA, SCL) 100Kbps, 400Kbps, 3.4Mbps
SPI (master only)	Set Count Speed	1 (MOSI, MISO, SCK) 104Kbps~26Mbps
UART	Set Count	1 (Rx, Tx)
UART on USB*	Set Count	1
Xadow (Seeed Studio)	Set Count Speed	Signal 2.8V, Power 3.3V 850/900/1800/1900 MHz
Communications	GSM GPRS Bluetooth Wi-Fi	850/900/1800/1900 MHz Class 12 2.1 SPP and 4.0 GATT (Dual Mode) 802.11 b/g/n
Positioning	GNSS	GPS/GLONASS/BeiDou
Display Module	LCD Driving IC	Truly 240x240 Transflective ST7789S

Module

LinkIt Assist 2502 Module

Designed by AcSiP, theses module include:

LinkIt Assist 2502 module (containing the MediaTek MT2502, delivered as AcSiP module AI2502S05)
LinkIt Assist 2502 Wi-Fi module (containing the MediaTek MT5931, delivered as AcSiP module CW01S)
LinkIt Assist 2502 GNSS module (containing the MediaTek MT3332, delivered as AcSiP module CW03S)

These modules are designed to be incorporated into the PCB design of final products.

Downloads

Module specifications

Category	Feature	Spec
Microcontroller (MCU)	Chipset Core Clock Speed	MT2502A ARM7EJ-S™ 260MHz
Module Size Package		17mm x 15mm x 1.8mm LGA
Operating limits	Temperature Humidity	-20℃~ 70℃ 10 ~ 95% (Non-Condensing)
Storage	Temperature Humidity	-40℃~ 85℃ 5 ~ 95% (Non-Condensing)
Memory	Flash RAM	16Mb 4Mb
Power	Operating voltage	3.4~4.2V
Digital IO Pins	Pin Count Voltage	TDB 3.3V
Analog IO Pins	Pin Count Voltage	5 TBD 0~5V
PWM Output Pins	Pin Count Maximum Resolution	2 13bit@1.6kHz 8bit@50.8kHz 4bit@800kHz
I2C (master only)	Operating frequencies	100Kbps 400Kbps 3.4Mbps
SPI (master only)	Operating frequencies	104Kbps~26Mbps
GSM/GPRS	Operating frequencies	850/900/1800/1900MHz
Bluetooth		Bluetooth 2.1 Bluetooth 4.0 (Dual mode)

Chipset

MT2502A

The hardware core for LinkIt ONE development platform is MediaTek MT2502A.

The MediaTek MT2502A is a feature-rich and extremely powerful single-chip solution for high-end GSM/GPRS (2G) capabilities. It also features a highly integrated Bluetooth transceiver which is fully compliant with Bluetooth specification v4.0.

This chipset also works with our Wi-Fi(MT5931) and GNSS(MT3332) chips, offering high performance and low power consumption for Wearable and IoT devices.

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SDK

The LinkIt Assist 2502 SDK 2.0 provides a plug-in for Eclipse IDE (with CDT) to enable software coding, and includes tools to update firmware on and upload software to the LinkIt Assist 2502 development board.

Key features

C API runtime environment
Compiles projects into LinkIt Assist 2502 execution file format (.vxp)
LinkIt Assist 2502 API libraries provide communication functions for:

TCP sockets
HTTPS
Bluetooth 4.0 GATT and more

User interface through LCM display module with support for vector fonts (powered by etrump), graphics, compression, and more
Compatible with Eclipse IDE (Indigo) with CDT plug-in (8.0.2 or later)
Supports Microsoft Windows XP, Vista, 7 and 8

Note

Software developed with the LinkIt Assist 2502 SDK can also run on the LinkIt ONE development board with some limitations, see the MediaTek LinkIt Assist 2502 Developer’s Guide for more details.