AM28F512-200EIB View Datasheet(PDF) - Advanced Micro Devices

Part Name

Description

Manufacturer

AM28F512-200EIB

512 Kilobit (64 K x 8-Bit) CMOS 12.0 Volt, Bulk Erase Flash Memory

Advanced Micro Devices 

Auto Select Command

AMD’s Flash memories are designed for use in applica-

tions where the local CPU alters memory contents. Ac-

cordingly, manufacturer and device codes must be

accessible while the device resides in the target sys-

tem. PROM programmers typically access the signa-

ture codes by raising A9 to a high voltage. However,

multiplexing high voltage onto address lines is not a

generally desired system design practice.

The device contains an Auto Select operation to sup-

plement traditional PROM programming methodology.

The operation is initiated by writing 80h or 90h into the

command register. Following this command, a read

cycle address 0000h retrieves the manufacturer code

of 01h. A read cycle from address 0001h returns the

device code. To terminate the operation, it is necessary

to write another valid command, such as Reset (FFh),

into the register.

20

Am28F512

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