180 MHz Cortex-M4 with 2 MB Flash — the compute and memory budget
The STM32F479BIT6 runs at 180 MHz with 2 MB Flash and 384 KB RAM.
Ethernet, USB OTG, CAN — the connectivity set for a system-on-chip
This part integrates an Ethernet MAC, dual USB OTG (host/device), three CAN 2.0B interfaces, and a full complement of SPI, I²C, UART, and SAI serial audio interfaces. For a design that needs to bridge a CAN-based sensor network to an Ethernet backbone and serve a web interface over USB, the STM32F479BIT6 handles all three physical layers without external controllers. The 161 general-purpose I/O lines, mapped across the 208-LQFP package, provide enough pins to drive a parallel TFT LCD (via the built-in LCD controller), read a 24-channel 12-bit ADC, and still leave room for a memory-mapped EBI/EMI bus to external SRAM or NOR Flash.
208-LQFP footprint — board area and routing
That is a large, hand-solderable QFP — no BGA reflow required, but the board area commitment is about 784 mm². The 161 I/O signals will need at least a 4-layer PCB to route cleanly, especially when the Ethernet RMII and USB differential pairs are in the mix.