Microchip Technology AVR-IoT Wx, Руководство пользователя по оборудованию

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Table 4-8. MCP9808
MCP9808 Pin ATmega4808 Pin Function Shared Functionality
SDA PA2 TWI0 SDA ATECC608A and mikroBUS
SCL PA3 TWI0 SCL ATECC608A and mikroBUS
Alert PC2 ASYNC External Interrupt —
4.4.6 Light Sensor
A TEMT6000X01 light sensor is mounted on the AVR-IoT Wx board for measuring the light intensity. The sensor is a
current source that will induce a voltage across the series resistor, which in turn can be measured by the
ATmega4808 ADC. The current is exponentially relative to illuminance, from about 10 µA@20lx to 50 µA@100lx. The
series resistor has a value of 10 kΩ.
Table 4-9. Light Sensor Connection
ATmega4808 Pin Function Shared Functionality
PD5 ADC AIN5 —
4.4.7 LED
There are four LEDs available on the AVR-IoT Wx board that can be controlled with PWM or GPIO. The LEDs can be
activated by driving the connected I/O line to GND.
Table 4-10. LED Connections
ATmega4808 Pin Function Description
PD0 TCA0 WO0 Red LED
PD1 TCA0 WO1 Yellow LED
PD2 TCA0 WO2 Green LED
PD3 TCA0 WO3 Blue LED
4.4.8 Mechanical Buttons
AVR-IoT Wx contains two mechanical buttons. These are generic user-configurable buttons. When a button is
pressed, it will drive the connected I/O line to ground (GND).
Info: There are no pull-up resistors connected to the generic user buttons. Remember to enable the
internal pull-up in the ATmega4808 to use the buttons.
Table 4-11. Mechanical Button
ATmega4808 Pin Description Shared Functionality
PF6 User switch 0 (SW0) On-board debugger
PF5 User switch 1 (SW1) On-board debugger
AVR-IoT Wx Hardware User Guide
Hardware User Guide
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2020 Microchip Technology Inc.
User Guide
DS50002805B-page 19