厂商不同,read ID可能不一样啦,需要看datatsheet....
Hynix有款flash,其read ID如下:
The device contains a product identification mode, initiated by writing 90h to the command register, followed by an address input of 00h. Five read cycles sequentially output the manufacturer code (ADh), and the device code and 3rd,4th, 5th cycle ID, respectively. The command register remains in Read ID mode until further commands are issued to
it. Figure 23 shows the operation sequence, while tables 14 explain the byte meaning.