SUMMARY DESCRIPTION
The M28W320FS and M28W640FS are 32 Mbit (2Mbit x 16) and 64 Mbit (4Mbit x 16) Secure Flash memories. The devices can be erased electrically at block level and programmed in-system on a Word-by-Word basis using a 2.7V to 3.6V VDD supply for the circuitry and a 1.65V to 3.6V VDDQ supply for the Input/Output pins. An optional 12V VPP power supply is provided to speed up customer programming.

FEATURES SUMMARY
■ SUPPLY VOLTAGE
   – VDD = 2.7V to 3.6V Core Power Supply
   – VDDQ= 1.65V to 3.6V for Input/Output
   – VPP = 12V for fast Program (optional)
■ ACCESS TIME: 70ns
■ PROGRAMMING TIME:
   – 10µs typical
   – Double Word Programming Option
   – Quadruple Word Programming Option
■ COMMON FLASH INTERFACE
■ MEMORY BLOCKS
   – Parameter Blocks (Top or Bottom location)
   – Main Blocks
■ HARDWARE PROTECTION
   – VPP Pin for write protect of all blocks
■ SECURITY FEATURES
   – 128 bit User-programmable OTP segment
   – 64 bit Unique Device Identifier
   – KRYPTO Features:
      Modify Protection,
      Read Protection,
      Device Authentication
■ AUTOMATIC STAND-BY MODE
■ PROGRAM and ERASE SUSPEND
■ 100,000 PROGRAM/ERASE CYCLES per BLOCK
■ ELECTRONIC SIGNATURE
   – Manufacturer Code: 20h
   – Device Codes:
      M28W320FST: 880Ah,
      M28W320FSB: 880Bh
      M28W640FST: 8858h,
      M28W640FSB: 8859h
■ ECOPACK® PACKAGE AVAILABLE