ATTiny with 16 Extra GPIO: MCP23017 GPIO Expander with 0-Series 1-Series Devices

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This is an ATTiny 14 pin 0-Series or 1-Series breakout pcb with on-board MCP23017 GPIO expander, I2C OLED display header, and a UPDI header for connecting to a programmer.

This can be used as a basic controller with support for I2C, SPI, UART, or normal ATTiny GPIO plus 16 extra GPIO pins.

If you'd like to support the channel, you can:

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Комментарии
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Thank you !
Merci beaucoup !
Well explained. You are generous !
I hope that you will continue your good job.

jrapplefan
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Must be fun to play with this next generation of Atmel Tiny chips. The OLD ones, like the atiny84 and attiny85 cost 2x and 3x as much as they did a few years ago.
Was able to rasterize an 8x8 LED matrix with a MCP23017. Had to put a transistor on every row to drain, and the refresh rate was not terrifically fast ... but it works. In Marlin, there are provisions for driving LCD displays that hog a lot of I/O pins through i2c port expanders. Ideas.

GnuReligion
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Nice, I wonder how much smaller the code might be outside of the arduino environment. just a thought as the arduino's code is ot the fastest on the block.

TheEmbeddedHobbyist