80 MHz Cortex-M3 with Ethernet, USB OTG, and CAN — the industrial gateway MCU that went EOL
The 60 GPIOs and 16-channel 10-bit ADC make it suitable for industrial control panels, building automation gateways, motor drives with fieldbus, and networked sensor concentrators that need wired connectivity in a single chip.
The 64 KB SRAM must be budgeted carefully when running Ethernet and USB stacks simultaneously — each Ethernet frame buffer consumes about 1.5 KB, and USB descriptors and endpoint buffers add another 4–8 KB. Designs that need larger data arrays or multiple protocol buffers should consider external memory via the EBI/EMI interface.
New-production units are no longer available from the factory. The only supply channel is surplus inventory held by independent distributors and brokers.
100-LQFP package and industrial temperature range
Housed in a 100-LQFP (14x14 mm) package, this is a fine-pitch QFP that requires careful soldering profile control and X-ray inspection for hidden solder bridges. The core supply is a narrow 1.235 V to 1.365 V range — a dedicated low-noise LDO is recommended, not a shared rail.