What the STM32L4A6RGT6TR brings to the board
The STM32L4A6RGT6TR is an STM32L4-series 32-bit ARM Cortex-M4 MCU from STMicroelectronics, clocked at 80 MHz with 1 MB of Flash and 320 KB of SRAM. It packs 52 I/O lines, a 16-channel 12-bit ADC and a 2-channel 12-bit DAC, plus connectivity that includes USB OTG, CAN, QSPI, SAI, and an external bus interface (EBI/EMI). The supply range spans 1.71 V to 3.6 V, and the operating temperature covers -40 °C to 85 °C. It comes in a 64-LQFP package, supplied on tape and reel.
80 MHz Cortex-M4 — enough for sensor fusion and control loops
The 80 MHz ARM Cortex-M4 with single-cycle multiply and hardware FPU handles sensor fusion, motor-control FOC loops, and audio processing. The 1 MB Flash leaves room for field-upgradeable application code.
Memory split — no external RAM needed for most jobs
320 KB of SRAM is enough to run a real-time OS, several communication stacks (USB, CAN, SPI), and a moderate data buffer without external memory. The QSPI interface lets you add a serial NOR Flash for data logging or font storage, but the MCU does not require external memory to boot or operate. The EBI/EMI interface can drive parallel SRAM or NAND if your application needs it, but that is an option, not a necessity.
Connectivity set — one chip for industrial fieldbus and HMI
The peripheral list covers CAN for industrial fieldbus, USB OTG for host/device connectivity, QSPI for high-speed serial memory, SAI for I²S audio codecs, and EBI/EMI for parallel displays or external memory.
Lifecycle and supply reality
The lifecycle status is listed as Active, though a separate internal flag marks the part as end-of-life hot. This discrepancy means a buyer should confirm long-term availability with the supplier. No official successor part number is listed. The part is available to order through independent distribution; current pricing and lead time are confirmed at quote time against an RFQ.