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TMS570LS3137: 通过F021 FLASH API,对片内FLASH进行擦除,读写操作,只能访问BANK7,无法访问BANK0和BANK1

Part Number: TMS570LS3137

用的是TMS570LS3137ZWT型号,在使用F021 FLASH API 时,用同样的API操作,只能对片内FLASH的BANK7进行擦除,读,写,无法对BANK0 和 BANK1进行读操作,直接对其地址进行访问就会跑飞,跳转到底层的flash read error里,请问这是为什么?