Geolink OpenTracker 2.4, Руководство пользователя

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20 OpenTracker 2.4 User Manual (1.4.0)
Internal I/O
The internal I/O Expansion connector is a 20-pin standard 2.54mm pitch female header.
It features the following interfaces and signals:

1 x SPI

2 x UART/USART

1 x I2C

2 x Analog Input (ADC)

2 x PWM (1 shared with UART TX)

GPIO (shared with any other peripherals)

RESET (open-drain input/output from main controller)

ERASE (full chip erase request)

3.3V

4V (exact voltage may vary around 4.3V)

VIN

GND
PLEASE NOTE: IMPORTANT NOTE!
The I/O voltage levels are not 5V tolerant!
Only use 3.3V levels!
The internal I/O is reserved for custom Expansion boards done by the user to add functionalities for special
applications.
Pin assignment