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GENERAL DESCRIPTION

The Am29F400B in Known Good Die (KGD) form is a 4 Mbit, 5.0 volt-only Flash memory. AMD defines KGD as standard product in die form, tested for functionality and speed. AMD KGD products have the same reliability and quality as AMD products in packaged form.

DISTINCTIVE CHARACTERISTICS

■ Single power supply operation

— 5.0 volt-only operation for read, erase, and program operations

— Minimizes system level requirements

■ Manufactured on 0.35 ?m process technology

— Compatible with 0.5 ?m Am29F400 device

■ High performance

— Acess time as fast as 70 ns

■ Low power consumption (typical values at 5 MHz)

— 1 ?A standby mode current

— 20 mA read current (byte mode)

— 28 mA read current (word mode)

— 30 mA program/erase current

■ Flexible sector architecture

— One 16 Kbyte, two 8 Kbyte, one 32 Kbyte, and seven 64 Kbyte sectors (byte mode)

— One 8 Kword, two 4 Kword, one 16 Kword, and seven 32 Kword sectors (word mode)

— Supports full chip erase

— Sector Protection features:

A hardware method of locking a sector to

prevent any program or erase operations within

that sector

Sectors can be locked via programming

equipment

Temporary Sector Unprotect feature allows code

changes in previously locked sectors

■ Top or bottom boot block configurations available

■ Embedded Algorithms

— Embedded Erase algorithm automatically preprograms and erases the entire chip or any combination of designated sectors

— Embedded Program algorithm automatically writes and verifies data at specified addresses

■ Minimum 1,000,000 write cycle per sector guaranteed

■ Compatibility with JEDEC standards

— Pinout and software compatible with singlepower-supply Flash

— Superior inadvertent write protection

■ Data# Polling and toggle bits

— Provides a software method of detecting program or erase operation completion

■ Ready/Busy# pin (RY/BY#)

— Provides a hardware method of detecting program or erase cycle completion

■ Erase Suspend/Erase Resume

— Suspends an erase operation to read data from, or program data to, a sector that is not being erased, then resumes the erase operation

■ Hardware reset pin (RESET#)

— Hardware method to reset the device to reading array data