#define SPI_Flash_Read_CMD 0x03
#define SPI_Flash_Sector_Erase 0x20
#define SPI_Flash_Block_Erase 0xD8
#define SPI_Flash_Chip_Erase 0x60
#define SPI_Flash_Page_Program 0x02
#define SPI_Flash_Read_Status 0x05
#define SPI_Flash_Write_Status 0x01
#define SPI_Flash_Write_Enable 0x06
#define SPI_Flash_Write_Disable 0x04
#define SPI_Flash_Read_ID 0x9F
#define SPI_Flash_Read 0x03
#define SPI_Flash_Fast_Read 0x0B
#define SPI_Flash_Power_Down 0xB9
#define SPI_Flash_Release_DP 0xAB
#define SPI_Flash_Enter_4K 0xA5
#define SPI_Flash_Exit_4K 0xB5
#define SPI_Flash_Read_ES 0xAB
#define SPI_Flash_Read_EMS 0x90
#define SPI_Flash_Parallel_Mode 0x55