Microchip Technology AVR-IoT Wx, Hardware User'S Manual

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WIN1510 Pin ATmega4808 Pin Function Shared Functionality
22 CHIP_EN PF3 GPIO —
23 VDDIO VCC_TARGET 3.3V supply —
28 GND GND Ground —
29 PADDLE GND — —
4.4.4 ATECC608A
ATECC608A is a secure element from the Microchip CryptoAuthentication portfolio with advanced Elliptic Curve
Cryptography (ECC) capabilities. With ECDH and ECDSA being built right in, this device is ideal for the rapidly
growing Internet of Things (IoT) market by easily supplying the full range of security, such as confidentiality, data
integrity, and authentication to systems with MCU or MPUs running encryption/decryption algorithms. Similar to all
Microchip CryptoAuthentication products, the new ATECC608A employs ultra-secure, hardware-based cryptographic
key storage and cryptographic countermeasures that eliminate any potential backdoors linked to software
weaknesses.
The ATECC608A CryptoAuthentication device on the AVR-IoT Wx board is used to authenticate the hardware with
cloud providers to uniquely identify every board.
Note: 7-bit I
2
C address: 0x58.
Table 4-7. ATECC608A Connections
ATECC608A Pin ATmega4808 Pin Function Shared Functionality
SDA PA2 TWI0 SDA MCP9808 and mikroBUS
SCL PA3 TWI0 SCL MCP9808 and mikroBUS
4.4.5 Temperature Sensor
The MCP9808 digital temperature sensor converts temperatures between -20°C and +100°C to a digital word with
±0.25°C/±0.5°C (typical/maximum) accuracy.
Additional features:
• Accuracy:
– ±0.25°C (typical) from -40°C to +125°C
– ±0.5°C (maximum) from -20°C to +100°C
• User Selectable Measurement Resolution:
– 0.5°C, 0.25°C, 0.125°C, 0.0625°C
• User Programmable Temperature Limits:
– Temperature Window Limit
– Critical Temperature Limit
• User Programmable Temperature Alert Output
• Operating Voltage Range:
– 2.7V to 5.5V
• Operating Current:
– 200 μA (typical)
• Shutdown Current:
– 0.1 μA (typical)
The MCP9808 temperature sensor is connected to the ATmega4808 through I
2
C and a GPIO for the user-
configurable alert output.
Note: 7-bit I
2
C address: 0x18.
AVR-IoT Wx Hardware User Guide
Hardware User Guide
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2020 Microchip Technology Inc.
User Guide
DS50002805B-page 18