The AT45DB041B is an SPI compatible serial interface Flash memory ideally suited for a wide variety of digital voice-, image-, program code- and data-storage applications. Its 4,325,376 bits of memory are organized as 2048 pages of 264 bytes each

1.3寸OLED测试程序，4-SPI接口模式-1.3inch oled test code,4 bit serial interface