ROM Read-only memory (ROM) is a class of storage medium used in computers and other electronic devices. Data stored in ROM can only be modified slowly, with difficulty, or not at all, so it is mainly used to distribute firmware(software that is very
cache 控制器顶层有4组接口,分别为输入I/D bus ,输出TCM bus /Cache bus /direct flash bus (走cache ID bus matrix) flash 控制器 fshc有两组接口 分别是cache bus(此组主要用来做mcu取指的) 和 mcu bus(此组主要用来做flash 寄存器配置的,走SBUS BMTX)