Preliminary W49F201

Publication Release Date: June 1999

- 5 -

Revision A1

In addition to data polling, the W49F201 provides another method for determining the end of a

produce alternating 0's and 1's. When the program or erase cycle is completed, this toggling between

0's and 1's will stop. The device is then ready for the next operation.

Product Identification

The product ID operation outputs the manufacturer code and device code. Programming equipment

automatically matches the device with its proper erase and programming algorithms.

The manufacturer and device codes can be accessed by software or hardware operation. In the

software access mode, a six-word (or JEDEC 3-word) command sequence can be used to access the

product ID. A read from address 0000H outputs the manufacturer code, 00DA(hex). A read from

address 0001(hex) outputs the device code, 00AE(hex). The product ID operation can be terminated

by a three-word command sequence or an alternative one-word command sequence (see Command

Definition table).

In the hardware access mode, access to the product ID is activated by forcing CE and OE low, WE

high, and raising A9 to 12 volts.

TABLE OF OPERATING MODES

Operating Mode Selection

±5 %)

MODE

PINS

CE

OE

WE

RESET

ADDRESS

DQ.

Read

Dout

Erase/Program

Din

Standby

X

X

X

High Z

Erase/Program

X

X

X

Inhibit

X

X

X

Output Disable

X

X

X

High Z

Product ID

A1

Manufacturer Code

00DA (Hex)

A1

Device Code

00AE (Hex)

Reset

X

X

X

X

High Z