MCU can be divided into no on-chip ROM type and with on-chip ROM type according to its memory type. For chips without on-chip ROM, EPROM must be connected externally (typical chip is 8031).
Consult +MCU can be divided into no on-chip ROM type and with on-chip ROM type according to its memory type. For chips without on-chip ROM, EPROM must be connected externally (typical chip is 8031).