Devices APM32F1 Series APM32F107 APM32F107 Geehy Devices 4 APM32F107RB APM32F107 Cortex-M3 APM32F107RC APM32F107 Cortex-M3 APM32F107VB APM32F107 Cortex-M3 APM32F107VC APM32F107 Cortex-M3