Incredibly, the Teensy 4.0 is priced at $19.95 ... coupled buses is optimized for access by the peripherals using DMA. The board consumes around 100 mA with a 600 MHz clock.
First off, the Teensy 3.1 is fast, running at 96MHz in this case. Second, it has Direct Memory Access (DMA) which [Louis] used in the Smartmatrix library. This means that driving the display takes ...
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