The STM32L4Q5RGT6P is a 32-bit ARM Cortex-M4 MCU from STMicroelectronics, clocked at 120 MHz with 1 MB of Flash and 320 KB of SRAM. It sits in the STM32L4 series, targeting applications that balance processing throughput with power efficiency — think industrial control, IoT gateways, and sensor fusion nodes.
Memory and connectivity — sizing the BOM
1 MB Flash is enough for a full application stack with a FAT file system or a TCP/IP stack; 320 KB SRAM gives headroom for multiple data buffers and a modest RTOS heap. The connectivity set — CAN, USB OTG, SAI, and EBI/EMI — lets this MCU talk to a CAN bus, host a USB mass-storage device, drive an audio codec, or interface with external parallel memory. No external PHY or level shifters needed for most of these interfaces, which simplifies the PCB layout.
What the peripherals enable
The on-chip data converters — 16-channel 12-bit ADC and dual 12-bit DAC — cover analog sensor acquisition and control-voltage generation without external parts. Brown-out detect and POR keep the reset logic clean during power-up, which matters for battery-powered or intermittently powered designs.