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SUMMARY DESCRIPTION

The M28R400C is a 4 Mbit (256Kbit x 16) non-volatile Flash memory that can be erased electrically at the block level and programmed in-system on a Word-by-Word basis. These operations can be performed using a single low voltage (1.65 to 2.2V) supply. VDDQ allows to drive the I/O pin down to 1.65V. An optional 12V VPP power supply is provided to speed up customer programming.

FEATURES SUMMARY

■ SUPPLY VOLTAGE

– VDD = 1.65V to 2.2V Core Power Supply

– VDDQ= 1.65V to 2.2V for Input/Output

– VPP = 12V for fast Program (optional)

■ ACCESS TIMES: 90ns, 120ns

■ PROGRAMMING TIME

– 10?s typical

– Double Word Programming Option

■ COMMON FLASH INTERFACE

– 64 bit Security Code

■ MEMORY BLOCKS

– Parameter Blocks (Top or Bottom location)

– Main Blocks

■ BLOCK LOCKING

– All blocks locked at Power Up

– Any combination of blocks can be locked

– WP for Block Lock-Down

■ SECURITY

– 64 bit user Programmable OTP cells

– 64 bit unique device identifier

– One Parameter Block Permanently Lockable

■ AUTOMATIC STAND-BY MODE

■ PROGRAM and ERASE SUSPEND

■ 100,000 PROGRAM/ERASE CYCLES per BLOCK

■ ELECTRONIC SIGNATURE

– Manufacturer Code: 20h

– Top Device Code, M28R400CT: 882Ah

– Bottom Device Code, M28R400CB: 882Bh