ST M25PXX 512 Kbit to 32 Mbit Low Voltage Serial Flash Memory With 40 MHz or 50 MHz SPI Bus Interface handbook
Datasheet
M25Pxx is a 512Kbit to 32Mbit (2M x 8) Serial Flash Memory with advanced write protection mechanisms, accessed by a high-speed SPI-compatible bus. The memory can be programmed 1 to 256 bytes at a time, using the Page Program instruction. The memory is organized as a number of sectors, each containing 256 or 128 pages. Each page is 256 bytes wide. The whole memory can be erased using the Bulk Erase instruction, or a sector at a time, using the Sector Erase instruction.