How to compile EFM8BB50 microcontroller using Keil uVision

You are right, this device is not in our device database. There are three ways to use new 8051 based devices in uVision:

• Select a generic device in µVision and add all your header files and adjust RAM/ROM settings for the linker that reflect the memory of your new device. This is described at the beginning of this KBA: https://developer.arm.com/documentation/ka003573/latest/
• Silabs or you could make a user-defined device database which can then be distributed among colleagues or customers of Silabs. This is described in this KBA: https://developer.arm.com/documentation/ka003843/latest/
• You could add this device manually in uVision. This is described in the second half of this KBA:
  https://developer.arm.com/documentation/ka003573/latest/

You are right, this device is not in our device database. There are three ways to use new 8051 based devices in uVision:

• Select a generic device in µVision and add all your header files and adjust RAM/ROM settings for the linker that reflect the memory of your new device. This is described at the beginning of this KBA: https://developer.arm.com/documentation/ka003573/latest/
• Silabs or you could make a user-defined device database which can then be distributed among colleagues or customers of Silabs. This is described in this KBA: https://developer.arm.com/documentation/ka003843/latest/
• You could add this device manually in uVision. This is described in the second half of this KBA:
  https://developer.arm.com/documentation/ka003573/latest/