
Intel
4-MBIT (256K x16, 512K x8) 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