Datasheet - STM32H757xI - Dual 32-bit Arm<Sup>®</Sup> Cortex<Sup>®</Sup>-M7 up to 480MHz and -M4 MCUs,
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Adafruit ESP32 Feather V2 - 8MB Flash + 2 MB PSRAM [STEMMA QT] : ID 5400 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits
ARM®-based Cortex®-M7 32b MCU+FPU, 462DMIPS, up to 2MB Flash/512+16+4KB RAM, USB OTG HS/FS, ethernet, 18 TIMs, 3 ADCs, 28 com
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New STM32H7 Cortex-M7 MCUs Clock at 550 MHz, Feature Octal SPI Flash and Ethernet Interfaces - CNX Software
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