STMicroelectronics STM32G491CET6, 32 bit ARM Cortex M4, STM32G491 Microcontroller, 48 MHz, 512kB FLASH, 48-Pin LQFP

Mainstream Arm Cortex-M4 MCU 170 MHz with 512 Kbytes of Flash memory, Math Accelerator, High Analog level integration

The STMicroelectronics STM32G491xC/xE devices are based on the high-performance Arm® Cortex®-M4 32-bit RISC core. They operate at a frequency of up to 170 MHz.
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.
• They also feature standard and advanced communication interfaces such as:

• Three I2Cs
• Three SPIs multiplexed with two half duplex I2Ss
• Three USARTs, two UARTs and one low-power UART.
• Two FDCANs
• One SAI
• USB device
• UCPD

The devices operate in the -40 to +85 °C (+105 °C junction) and -40 to +125 °C (+130 °C junction) temperature ranges from a 1.71 to 3.6 V power supply. A comprehensive set of power-saving modes allows the design of low-power applications.
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.

Key features

• Core: Arm® 32-bit Cortex®-M4 CPU with FPU, Adaptive real-time accelerator (ART Accelerator) allowing 0-wait-state execution from Flash memory, frequency up to 170 MHz with 213 DMIPS, MPU, DSP instructions
• Operating conditions:
• VDD, VDDA voltage range: 1.71 V to 3.6 V
• Mathematical hardware accelerators
• CORDIC for trigonometric functions acceleration
• FMAC: filter mathematical accelerator
• Memories
• 512 Kbytes of Flash memory with ECC support, proprietary code readout protection (PCROP), securable memory area, 1 Kbyte OTP
• 96 Kbytes of SRAM, with hardware parity check implemented on the first 32 Kbytes
• Routine booster: 16 Kbytes of SRAM on instruction and data bus, with hardware parity check (CCM SRAM)
• Quad-SPI memory interface
• Reset and supply management
• Power-on/power-down reset (POR/PDR/BOR)
• Programmable voltage detector (PVD)
• Low-power modes: sleep, stop, standby and shutdown
• VBAT supply for RTC and backup registers
• Clock management
• 4 to 48 MHz crystal oscillator
• 32 kHz oscillator with calibration
• Internal 16 MHz RC with PLL option (± 1%)
• Internal 32 kHz RC oscillator (± 5%)
• Up to 86 fast I/Os
• All mappable on external interrupt vectors
• Several I/Os with 5 V tolerant capability
• 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
• 2 x buffered external channels 1 MSPS
• 2 x unbuffered internal channels 15 MSPS
• 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