Medical Device

Radiocommunications Service

(MICS) Starter System

(December, 2020)

Starter System Overview

• A basic Medical Implant Communications System (MICS) demonstration

platform has been developed

• Operates using the world wide 402–405 MHz MICS band

• Provides a starting point for medical implant device developers

• Consists of PC user interface, Base Station board, and Implant board

• Saves developers time by providing the Hardware, Software, and

Firmware to customize this extensible system for their own implantable

application

System Synopsis

• Host GUI

• Basic command / response display

• Nine basic Base Station (BS) commands

• Seven basic over-the-air Implant commands

• Base Station

• Connected to Host via USB -> Serial HW

• Processes and Responds to BS commands

• Forwards Commands Targeted to Implant via MICS

• Implant

• Processes and Responds to commands via MICS radio link

• Provides template for command extensibility

Host GUI

Base

Station

Over-the-Air

via MICS

System Synopsis

• The Host GUI is coded in C# and represents a simple interface with basic

features and providing CRC protected command packets

• A command – response logger provides a running history of activity

• The Base Station uses a state-driven synchronous operating system and

relies upon a general command and response regimen (one command at a

time), with RF protocol handled by a ZL70123 module

• The implant uses a timer-based sequential time slot operating system for

command and response as well as its background processing, with RF

protocol handled by a ZL70321 (or ZL70323) module

• Current commands:

CCA, Search, Set ID, Start Link, Close Link, Get BS Status, Get MICS

State, Set Channel, Get BS Firmware Version, IM Loopback Test, IM Authenticate, IM Start

Session, IM Set Value, IM Get ADC, IM get ver.

Command Header and Payload Data

• Command Transmit Header Definition

Receive Response has the Target and Response (“B”, ”I”) devices swapped.

ID field used for encrypted security algorithm.

• Command Transmit without data payload ends with two CRC byte