Dual-core architecture: 240 MHz Cortex-M4 plus 480 MHz Cortex-M7
The STMicroelectronics STM32H747ZIY6TR is a 32-bit dual-core microcontroller from the STM32H7 series, pairing an ARM Cortex-M7 core running at 480 MHz with a Cortex-M4 core at 240 MHz. This asymmetric architecture lets the M7 handle heavy number-crunching or real-time control loops while the M4 runs communications stacks, sensor fusion, or low-power background tasks — splitting the workload without a second chip.
156-WLCSP — what the fine-pitch package means for the board
Housed in a 156-ball WLCSP measuring 4.96 x 4.64 mm, this package saves board area at the cost of tighter routing rules. The 0.4 mm or 0.5 mm ball pitch (typical for this class) demands via-in-pad or microvia fanout on the top layer; a four-layer PCB with filled vias is the usual starting point. The 168 I/O count means nearly every ball is used, so signal breakout planning matters early.
Connectivity and peripheral set
The peripheral list includes Ethernet MAC, dual CAN interfaces, USB OTG FS/HS, multiple SPI, I²C, UART/USART, and a QSPI memory interface — enough to serve as the main processor in a connected gateway or a multi-protocol industrial controller.