![]() They can be used for many purposes I use it to drive HD44780-compatible character LCD, as can be seen in digital camera controller circuit, as well as this keyboard example. GPOUT pins are eight 3.3V general-purpose digital output pins of MAX3421E.SCK, MOSI, MISO and RESET signals from this connector are used. ICSP connector is used by the shield to send/receive data using SPI interface.An example of GPIN use can be seen in digital camera controller project. GPIN pins can also be programmed as a source of MAX3421E interrupt. ![]() They are used primarily to interface with buttons, rotary encoders and such.
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January 2023
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