Core: 32-bit Cortex-M4 with FPU CPU up to 288 MHz operating frequency, with Memory Protection Unit (MPU), built-in single-cycle multiplication and hardware division Built-in Floating Point Unit (FPU) With DSP instruction set 256 KB to 4032 KB of internal flash memory sLib: Sets the specified main memory area as an executable code secure library area, where code can only be called and not read Default 384 KB SRAM, maximum configurable to 512 KB External Memory Controller (XMC) with 16-bit data bus: supports CF card, SRAM, PSRAM, NOR, NAND and SDRAM memory Up to 2 QSPI interfaces, used to connect external SPI flash memory or SPI RAM expansion, supporting address mapping mode XMC as LCD parallel port, compatible with 8080/6800 modes 2.6 to 3.6 V power supply Power-On Reset (POR), Low Voltage Reset (LVR), Power Voltage Monitor (PVM) Low-power modes: Sleep, Deep Sleep, and Standby VBAT powers LEXT, ERTC and 20 32-bit Battery-Powered Registers (BPR) 4 to 25 MHz crystal oscillator (HEXT) Built-in factory-calibrated 48 MHz High-Speed Internal Clock (HICK), 1% accuracy at 25 °C, 2.5% accuracy from -40 to +105 °C, with Automatic Clock Calibration (ACC) function PLL flexibly configurable frequency multiplication and division factors 32 kHz crystal oscillator (LEXT) Low-Speed Internal Clock (LICK) 3 12-bit 5.33 MSPS A/D converters, up to 24 external input channels; adjustable resolution of 12/10/8/6 bits; hardware oversampling up to 16-bit resolution Temperature sensor (VTS), internal reference voltage (VINTRV), VBAT battery voltage monitoring (VBAT/4) 2 12-bit D/A converters 2 general-purpose DMA and 1 enhanced EDMA controller, totaling 22 channels Up to 116 fast GPIO ports All GPIO ports can be mapped to 16 External Interrupts (EXINT) Almost all GPIO ports are 5V input signal tolerant Up to 18 timers (TMR) Up to 13 16-bit and 2 32-bit timers, each timer up to 4 channels for input/output/PWM/pulse counting 2 watchdog timers (general-purpose WDT and windowed WWDT) System Tick Timer: 24-bit down counter ERTC: Enhanced RTC, with auto-wake up, alarm, sub-second accuracy, and hardware calendar, with calibration function Up to 23 communication interfaces Up to 3 I2C interfaces, supporting SMBus/PMBus Up to 4 USART/4 UART interfaces, supporting ISO7816, LIN, IrDA interfaces, modem control and RS485 driver enable, supporting TX/RX configurable pin swap Up to 4 SPI interfaces (36 Mbit/s), all 4 can be used as I2S interfaces, among which I2S2/I2S3 support full-duplex Up to 2 CAN interfaces (2.0B active) Up to 2 OTG full-speed controllers, supporting Crystal-less in device mode Up to 2 SDIO interfaces Infrared Transmitter (IRTMR) 10/100M Ethernet MAC (EMAC): with dedicated DMA and 4 KB SRAM, supporting IEEE 1588, MII/RMII interfaces (only AT32F437 supports)