MAX32660

• IEC 61131-9
• TMG TE IO-Link Stack
• IO-Link version 1.1 compliant
• Measures Distances up to 4m

• IEC 61131-9
• TMG TE IO-Link Stack or TEConcept IO-Link Stack
• IO-Link version 1.1 compliant
• Measures Temperature from -40°C to +105°C with ±1.5°C Accuracy

Maxim’s MAX32660 Microcontroller

• Ultra-Low-Power Operation
• 256KB Flash Memory and 96KB SRAM
• 3.05mm (L) x 3.05mm (W) x 0.80mm (H) TQFN Package

Axzon’s RFM405 Wireless Passive Sensor

• On-Chip Temperature Sensor
• UHF/RAIN Operation – EPCglobal^® Gen2 Compliant

Description

The MAXREFDES1207 is a reference design for wearable application based on a total Analog Devices solution which includes the MAX32660, MAX30112, MAX77651B, and MAX40005. This solution demonstrates how a small size, low cost, low power, high accuracy heart-rate (HR) monitor can be easily implemented. This design can monitor heart rate using two green LEDs.

The MAX30112 is an optimized pulse-oximeter and heartrate AFE for wearable health. It has a high-resolution, optical readout signal-processing channel with built-in ambient light cancellation as well as high-current LED driver DACs to form a complete optical readout signal chain. With external LED(s) and photodiode(s), the MAX30112 offers the lowest power, highest performance heart-rate detection solution for wrist applications. The MAX77651B provides highly-integrated battery charging and power supply solutions for low-power wearable applications where size and efficiency are critical. The device features a SIMO buckboost regulator that provides three independently programmable power rails from a single inductor to minimize total solution size. A highly configurable linear charger supports a wide range of Li+ battery capacities and includes battery temperature monitoring for additional safety (JEITA). The MAX32660 is an ultra-low-power, cost-effective, highly- integrated microcontroller unit (MCU) designed for battery- powered devices and wireless sensors. It combines a flexible and versatile power management unit with the powerful Arm^® Cortex^®-M4 with floating point unit (FPU). The MAX40005 is a tiny, single comparator which is ideal for a wide variety of portable electronics applications such as cell phones, media players, and notebooks that have extremely tight board space and power constraints. The design also contains an FTDI FT234 USB-to-serial UART interface.

Features

• Power and communication to I²C and SPI sensors through two wires
• 512-byte command sequencer for autonomous operation
• Up to 10mA at 3.3V sensor power derived from 1-Wire
• Up to 100m distance with the 1-Wire interface
• Example C-code demonstrates how to interface to I²C and SPI sensors

• Dedicated 1-Wire Master for Convenient 1-Wire Processing
• Up to 100m Remote Communication with Connected 1-Wire Slave Devices
• C-Code Demonstrates How to Use the DS2485 in Software Including an Example with the DS28E18

Designed–Built–Tested

A simple, cost-efficient, 1-Wire master is demonstrated using the DS2485 for a simple sensor application using the MAX32660 host microcontroller. This reference design includes the following major components: one each of MAX32660 Cortex-M4 microcontroller, DS2485 1-Wire master, DS28E18 1-Wire to I2C/SPI bridge and an I²C temperature sensor module. This document describes the hardware shown above as well as its supplementing software. It provides a detailed, systematic technical guide to set up and understand the MAXREFDES9004 reference design. The system has been built and tested, details of which follow later in this document.

• ECC-256 Compute Engine
• FIPS 186 ECDSA P256 Signature and Verification
• ECDH Key Exchange with Authentication Prevents Man-in-the-Middle Attacks
• ECDSA Authenticated R/W of Configurable Memory
• SHA-256 Compute Engine
• FIPS 180 MAC for Secure Download/Boot Operations
• FIPS 198 HMAC for Bidirectional Authentication and Optional GPIO Control
• Two GPIO Pins with Optional Authentication Control
• Open-Drain, 4mA/0.4V
• Optional SHA-256 or ECDSA Authenticated On/Off and State Read
• Optional Set On/Off After Multiblock Hash for Secure Boot/Download
• RNG with NIST SP 800-90B Compliant Entropy Source with Function to Read Out
• Optional Chip-Generated Pr/Pu Key Pairs for ECC Operations
• 17-Bit One-Time Settable, Nonvolatile Decrement-Only Counter with Authenticated Read
• 8Kbits of EEPROM for User Data, Keys, and Certificates
• Unique and Unalterable Factory Programmed 64-Bit Identification Number (ROM ID)
• Optional Input Data Component to Crypto and Key Operations
• Single-Contact 1-Wire Interface Communication with Host at 11.7kbps and 62.5kbps
• Operating Range: 3.3V ±10%, -40°C to +85°C
• 6-Pin TDFN-EP Package (3mm x 3mm)
• Accessory and Peripheral Secure Authentication
• IoT Node Crypto-Protection
• Secure Boot or Download of Firmware and/or System Parameters
• Secure Storage of Cryptographic Keys for a Host Controller

Application

• IoT Node Crypto-Protection
• Accessory and Peripheral Secure Authentication
• Secure Storage of Cryptographic Keys for a Host Controller
• Secure Boot or Download of Firmware and/or System Parameters

• Integrated solution
• Small size
• Low power
• High accuracy
• Flexible power output

• Maxim’s DS28S60 ChipDNA^™ technology protects private and secret keys against invasive attacks.
• Maxim’s DS28S60 provides end-to-end security using hardware-based ECDSA authentication, ECDH key exchange and AES-GCM authenticated encryption.
• Complete low-power sensor node board design
• Sample LoRaWAN gateway implementation based on Raspberry Pi
• Sample Google Cloud application showcasing end-to-end security with the sensor board’s DS28S60 including ECDH key exchange, and AES-GCM secure communication Source code
• Peripheral Module - compatible sensor expansion port
• Raspberry Pi enables portable LoRaWAN Gateway deployment