Nand flash controller to read/write or erase operations require CPU transfer instruction, and then to decoding of the directive, so to speak, see an article and the nand flash controller to do this is to send some instructions to the flash, for example write operation to send flash h, 80 h and 10 CPU instructions sent to the controller and the controller send to flash the same? Or both, should first CPU instructions for decoding and corresponding flash controller of each operation, corresponding to the controller then sends instructions to the flash