GENERAL DESCRIPTION
The A25LS512A is 512K bit 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 one block, containing 16 sectors.
Each sector is composed of 16 pages. Each page is 256 bytes wide. Thus, the whole memory can be viewed as consisting of 512 pages, or 65,536 bytes.
The whole memory can be erased using the Chip Erase instruction, a block at a time, using Block Erase instruction, or a sector at a time, using the Sector Erase instruction.

FEATURES
◾ Family of Serial Flash Memories
   - A25LS512A: 512K-bit /64K-byte
◾ Flexible Sector Architecture with 4KB sectors
   - Sector Erase (4K-bytes) in 0.2s (typical)
   - Block Erase (64K-bytes) in 0.5s (typical)
◾ Page Program (up to 256 Bytes) in 2ms (typical)
◾ 2.7 to 3.6V Single Supply Voltage
◾ SPI Bus Compatible Serial Interface
◾ 100MHz Clock Rate (maximum)
◾ Electronic Signatures
   - JEDEC Standard Two-Byte Signature
      A25LS512A (3010h)
   - RES Instruction, One-Byte, Signature, for backward
      compatibility
      A25LS512A (05h)
◾ Package options
   - 8-pin SOP (150/209mil), 8-pin DIP (300mil), 8-pin TSSOP ,
      8-pin USON (2*3mm) and 8-pin WSON (6*5mm)
   - All Pb-free (Lead-free) products are RoHS2.0 compliant