AT49F1024/1025

4

Notes:

1. The DATA FORMAT in each bus cycle is as follows: I/O15 - I/O8 (Don’t Care); I/O7 - I/O0 (Hex).

2. The 8K word boot sector has the address range 00000H to 1FFFH.

3. Either one of the Product ID Exit commands can be used.

Command Definition (in Hex)

Command

Sequence

Bus

Cycles

1st Bus

Cycle

2nd Bus

Cycle

3rd Bus

Cycle

4th Bus

Cycle

5th Bus

Cycle

6th Bus

Cycle

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Addr

Data

Read

1

Addr

D

OUT

Chip Erase

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

5555

10

Main Memory Erase

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

5555

30

Word Program

4

5555

AA

2AAA

55

5555

A0

Addr

D

IN

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

5555

40

Product ID Entry

3

5555

AA

2AAA

55

5555

90

3

5555

AA

2AAA

55

5555

F0

1xxxx

F0

Absolute Maximum Ratings*

Temperature Under Bias ................................ -55°C to +125°C

*NOTICE:

Stresses beyond those listed under “Absolute

Maximum Ratings” may cause permanent dam-

age to the device. This is a stress rating only and

functional operation of the device at these or any

other conditions beyond those indicated in the

operational sections of this specification is not

implied. Exposure to absolute maximum rating

conditions for extended periods may affect device

reliability.

Storage Temperature ..................................... -65°C to +150°C

All Input Voltages

(including NC Pins)

with Respect to Ground ...................................-0.6V to +6.25V

All Output Voltages

with Respect to Ground .............................-0.6V to V

Voltage on OE

with Respect to Ground ...................................-0.6V to +13.5V