The Cortex-M4 core features a single-precision floating-point unit (FPU), which supports all the Arm single-precision data-processing instructions and all the data types. It also implements a full set of DSP (digital signal processing) instructions and a memory protection unit (MPU) which enhances the application’s security.

These devices embed high-speed memories (512 Kbytes of Flash memory, and 112 Kbytes of SRAM), a Quad SPI Flash memory interface, an extensive range of enhanced I/Os and peripherals connected to two APB buses, two AHB buses and a 32-bit multi-AHB bus matrix.

The devices also embed several protection mechanisms for embedded Flash memory and SRAM: readout protection, write protection, securable memory area and proprietary code readout protection.

The devices embed peripherals allowing mathematical/arithmetic function acceleration (CORDIC for trigonometric functions and FMAC unit for filter functions).

They offer three fast 12-bit ADCs (5 Msps), four comparators, four operational amplifiers, four DAC channels (2 external and 2 internal), an internal voltage reference buffer, a low-power RTC, one general-purpose 32-bit timers, three 16-bit PWM timers dedicated to motor control, seven general-purpose 16-bit timers, and one 16-bit low-power timer.

Some independent power supplies are supported including an analog independent supply input for ADC, DAC, OPAMPs and comparators. A VBAT input allows backup of the RTC and the registers.

The STM32G491xC/xE family offers 9 packages from 32-pin to 100-pin.

Operating conditions:

Mathematical hardware accelerators:

Memories:

Reset and supply management:

Clock management:

Up to 86 fast I/Os:

Interconnect matrix

16-channel DMA controller

3 x ADCs 0.25 μs (up to 36 channels). Resolution up to 16-bit with hardware oversampling, 0 to 3.6 V conversion range

4 x 12-bit DAC channels:

4 x ultra-fast rail-to-rail analog comparators

4 x operational amplifiers that can be used in PGA mode, all terminals accessible

Internal voltage reference