Flash中內(nèi)置了一個(gè)狀態(tài)寄存器（Status Register，SR）來(lái)指示Flash的當(dāng)前工作狀態(tài)和各種操作是否成功。要讀取SR的當(dāng)前值需要向CUI發(fā)送讀狀態(tài)寄存器命令（Read Status Register），命令碼為0x70，SR中的內(nèi)容將在DQ[7:0]上輸出。The Read Status Register （0x70）command causes subsequent reads to output data from the SR until another command is issued. The SR bits are output on DQ[7:0].
