Arduino MKR Vidor 4000

a 2MB QSPI flash chip with 1 MB allocated for user applications. You can essentially create your controller board by using MKR VIDOR 4000. This includes the classic MKR interface on which all pins are driven both by SAMD21 and FPGA. It has a mini PCI Express connector with up to 25 user-programmable pins. Each pin can toggle at over 150MHz and can be configured for functions such as UARTs, (Q)SPI, high-resolution/high-frequency PWM, quadrature encoder, I2C, I2S, sigma-delta DAC, and more. It requires 3.3V operating voltage.