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M29F512B

Chip Enable (E). The Chip Enable, E, activates

the memory, allowing Bus Read and Bus Write op-

erations to be performed. When Chip Enable is

Output Enable (G). The Output Enable, G, con-

trols the Bus Read operation of the memory.

Write Enable (W). The Write Enable, W, controls

the Bus Write operation of the memory’s Com-

mand Interface.

supplies the power for all operations (Read, Pro-

gram, Erase etc.).

Supply Voltage is less than the Lockout Voltage,

cidentally damaging the data during power up,

power down and power surges. If the Program/

Erase Controller is programming or erasing during

this time then the operation aborts and the memo-

ry contents being altered will be invalid.

A 0.1µF capacitor should be connected between

pin to decouple the current surges from the power

supply. The PCB track widths must be sufficient to

carry the currents required during program and

for all voltage measurements.

BUS OPERATIONS

There are five standard bus operations that control

the device. These are Bus Read, Bus Write, Out-

put Disable, Standby and Automatic Standby. See

Table 3, Bus Operations, for a summary. Typically

glitches of less than 5ns are ignored by the mem-

ory and do not affect bus operations.

Bus Read. Bus Read operations read from the

memory cells, or specific registers in the Com-

mand Interface. A valid Bus Read operation in-

volves setting the desired address on the Address

and Output Enable and keeping Write Enable

value, see Figure 7, Read Mode AC Waveforms,

and Table 10, Read AC Characteristics, for details

of when the output becomes valid.

Bus Write. Bus Write operations write to the

Command Interface. A valid Bus Write operation

begins by setting the desired address on the Ad-

dress Inputs. The Address Inputs are latched by

the Command Interface on the falling edge of Chip

Enable or Write Enable, whichever occurs last.

The Data Inputs/Outputs are latched by the Com-

mand Interface on the rising edge of Chip Enable

or Write Enable, whichever occurs first. Output En-

Write operation. See Figures 8 and 9, Write AC

Waveforms, and Tables 11 and 12, Write AC

Characteristics, for details of the timing require-

ments.

Note: 1. Except for the rating "Operating Temperature Range", stresses above those listed in the Table "Absolute Maximum Ratings" may

cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions

above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating condi-

tions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant

quality documents.

2. Minimum Voltage may undershoot to –2V during transition and for less than 20ns during transitions.

Symbol

Parameter

Value

Unit

Ambient Operating Temperature

0 to 70

°C

Temperature Under Bias

–50 to 125

°C

Storage Temperature

–65 to 150

°C

(2)

Input or Output Voltage

–0.6 to 6

V

Supply Voltage

–0.6 to 6

V

Identification Voltage

–0.6 to 13.5

V