STM32L476MGY6TR — ultra-low-power Cortex-M4 in a WLCSP footprint
It runs at 80 MHz, packs 1 MB of Flash and 128 KB of SRAM, and comes in an 81-ball WLCSP package that fits into compact, battery-powered designs.
What the 80 MHz core and 1 MB Flash mean for your BOM
The 80 MHz Cortex-M4 with single-cycle multiply and hardware FPU handles sensor fusion, audio processing, and control loops that would bog down an M0+ or M3 at lower clock rates. The 1 MB Flash gives room for a full application stack plus an OTA update staging area — useful when the product ships with field-upgradeable firmware. 128 KB SRAM is enough for moderate data buffering and RTOS task stacks without external memory.
Connectivity and peripheral set for system integration
The 65 GPIOs in the WLCSP package are sufficient for a sensor hub or a control panel with a small display. On-chip 12-bit ADCs (16 channels) and dual 12-bit DACs cover analog front-end needs without an external converter.
Package and assembly considerations for the WLCSP variant
The package is surface-mount only; no socket option exists.