5

AT49F040A

3359B–FLASH–10/04

Notes:

1. The DATA FORMAT in each bus cycle is as follows: I/O7 - I/O0 (Hex). The address format in each bus cycle is as follows:

A11 - A0 (Hex); A11 - A18 (don’t care).

2. Since A11 is don’t care, AAA can be replaced with 2AA.

3. The 16K byte boot sector has the address range 00000H to 03FFFH.

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

5. SA = sector addresses:

SA = 00000 to 03FFF for BOOT BLOCK

SA = 04000 to 05FFF for PARAMETER BLOCK 1

SA = 06000 to 07FFF for PARAMETER BLOCK 2

SA = 08000 to FFFF for MAIN MEMORY ARRAY BLOCK 1

SA = 10000 to 1FFFF for MAIN MEMORY ARRAY BLOCK 2

SA = 20000 to 2FFFF for MAIN MEMORY ARRAY BLOCK 3

SA = 30000 to 3FFFF for MAIN MEMORY ARRAY BLOCK 4

SA = 40000 to 4FFFF for MAIN MEMORY ARRAY BLOCK 5

SA = 50000 to 5FFFF for MAIN MEMORY ARRAY BLOCK 6

SA = 60000 to 6FFFF for MAIN MEMORY ARRAY BLOCK 7

SA = 70000 to 7FFFF for MAIN MEMORY ARRAY BLOCK 8

Command Definition (in Hex)

(1)

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

555

AA

AAA(2)

55

555

80

555

AA

AAA

55

555

10

Sector Erase

6

555

AA

AAA

55

555

80

555

AA

AAA

55

SA

(5)

30

Byte Program

4

555

AA

AAA

55

555

A0

Addr

D

IN

Boot Block Lockout(3)

6

555

AA

AAA

55

555

80

555

AA

AAA

55

555

40

Product ID Entry

3

555

AA

AAA

55

555

90

Product ID Exit

(4)

3

555

AA

AAA

55

555

F0

Product ID Exit(4)

1

XXXX

F0

Absolute Maximum Ratings*

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

*NOTICE:

Stresses beyond those listed under “Absolute Maxi-

mum Ratings” may cause permanent damage to the

device. This is a stress rating only and functional

operation of the device at these or any other condi-

tions beyond those indicated in the operational sec-

tions 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