GENERAL DESCRIPTION
The A25P020 is 2M 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 4 blocks, each 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 1024 pages, or 262,144 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
   - A25P020: 2M-bit /256K-byte
◾ Flexible Sector Architecture with 4KB sectors
   - Sector Erase (4K-bytes) in 200ms (typical)
   - Block Erase (64K-bytes) in 0.5s (typical)
◾ Page Program (up to 256 Bytes) in 0.8ms (typical)
◾ 2.3V to 3.6V Single Supply Voltage
◾ SPI Bus Compatible Serial Interface
◾ 100MHz Clock Rate (maximum)
◾ Advanced Protection Features
   - Software and Hardware Write-Protect
   - Top/Bottom, Block/Sector Array Protection
◾ Electronic Signatures
   - JEDEC Standard Two-Byte Signature
      A25P020: (3012h)
   - RES Instruction, One-Byte, Signature, for backward
      compatibility
      A25P020 (11h)
◾ Package options
   - 8-pin SOP (150/209mil), 8-pin DIP (300mil), 8-pin USON
      (2*3mm) and 8-pin WSON (6*5mm)
   - All Pb-free (Lead-free) products are RoHS2.0 compliant