Device Description

M27W201

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2

Device Description

The operating modes of the M27W201 are listed in the Operating Modes table. A single

on A9 for Electronic Signature.

Table 1. Operating Modes

Note:

X = V

2.1

Read mode

The M27W201 has two control functions, both of which must be logically active in order to

obtain data at the outputs. Chip Enable (E) is the power control and should be used for

device selection. Output Enable (G) is the output control and should be used to gate data to

the output pins, independent of device selection. Assuming that the addresses are stable,

2.2

Standby mode

The M27W201 has a standby mode which reduces the supply current from 15mA to 15µA

details.The M27W201 is placed in the standby mode by applying a CMOS high signal to the

E input. When in the standby mode, the outputs are in a high impedance state, independent

of the G input.

Table 2.

Operating modes

Mode

E

G

P

A9

Q7-Q0

Read

XX

Data Out

Output Disable

XX

Hi-Z

Program

X

Data In

Verify

Data Out

Program Inhibit

XX

X

Hi-Z

Standby

XX

X

Hi-Z

Electronic Signature

Codes