Devices STM32H5 Series STM32H503 STM32H503 STMicroelectronics Devices 5 STM32H503CBTx STM32H503 Cortex-M33 STM32H503CBUx STM32H503 Cortex-M33 STM32H503EBYx STM32H503 Cortex-M33 STM32H503KBUx STM32H503 Cortex-M33 STM32H503RBTx STM32H503 Cortex-M33