Intel’s 4-Mbit Flash Memory Family is an extension of the Boot Block Architecture which includes block selective erasure, automated write and erase operations and standard microprocessor interface. The 4-Mbit Flash Memory Family enhances the Boot Block Architecture by adding more density and blocks, x8/x16 input/ output control, very high speed, low power, an industry standard ROM compatible pinout and surface mount packaging. The 4-Mbit flash family is an easy upgrade from Intel’s 2-Mbit Boot Block Flash Memory Family.
■ x8/x16 Input/Output Architecture
— A28F400BX-T, A28F400BX-B
— For High Performance and High Integration 16-bit and 32-bit CPUs
■ Optimized High Density Blocked Architecture
— One 16 KB Protected Boot Block
— Two 8 KB Parameter Blocks
— One 96 KB Main Block
— Three 128 KB Main Blocks
— Top or Bottom Boot Locations
■ Extended Cycling Capability
— 1,000 Block Erase Cycles
■ Automated Word/Byte Write and Block Erase
— Command User Interface
— Status Register
— Erase Suspend Capability
■ SRAM-Compatible Write Interface
■ Automatic Power Savings Feature
— 1 mA Typical ICC Active Current in Static Operation
■ Very High-Performance Read
— 90 ns Maximum Access Time
— 45 ns Maximum Output Enable Time
■ Low Power Consumption
— 25 mA Typical Active Read Current
■ Deep Power-Down/Reset Input
— Acts as Reset for Boot Operations
■ Automotive Temperature Operation
— b40§C to a125§C
■ Write Protection for Boot Block
■ Hardware Data Protection Feature
— Erase/Write Lockout During Power Transitions
■ Industry Standard Surface Mount Packaging
— JEDEC ROM Compatible 44-Lead PSOP
■ 12V Word/Byte Write and Block Erase
— VPP e 12V g5% Standard
■ ETOXTM III Flash Technology
— 5V Read