AT49F8192/8192T

4

will be read. Examining the toggle bit may begin at any time

during a program cycle.

HARDWARE DATA PROTECTION: Hardware features

protect against inadvertent programs to the AT49F8192 in

device will automatically time out 10 ms (typical) before

programming. (c) Program inhibit: holding any one of OE

low, CE high or WE high inhibits program cycles. (d) Noise

filter: pulses of less than 15 ns (typical) on the WE or CE

inputs will not initiate a program cycle.

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 01FFFH for the AT49F8192 and 7E000H

to 7FFFFH for the AT49F8192T.

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

used.

4. SA = sector addresses:

For the AT49F8192

SA = 03XXX for PARAMETER BLOCK 1

SA = 05XXX for PARAMETER BLOCK 2

SA = 7FXXX for MAIN MEMORY ARRAY

For the AT49F8192T

SA = 7DXXX for PARAMETER BLOCK 1

SA = 7BXXX for PARAMETER BLOCK 2

SA = 79XXX for MAIN MEMORY ARRAY

5. When the boot block programming lockout feature is

not enabled, the boot block and the main memory

block will erase together (form the same sector erase

command). Once the boot region has been pro-

tected, only the main memory array sector will erase

when its sector erase command is issued.

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

Chip Erase

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

5555

10

Sector

Erase

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

30

Word

Program

4

5555

AA

2AAA

55

5555

A0

Addr

Boot Block

6

5555

AA

2AAA

55

5555

80

5555

AA

2AAA

55

5555

40

Product ID

Entry

3

5555

AA

2AAA

55

5555

90

Product ID

3

5555

AA

2AAA

55

5555

F0

Product ID

1xxxx

F0

Absolute Maximum Ratings*

Temperature Under Bias ................................ -55

°C to +125°C

*NOTICE:

Stresses beyong 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

Voltage on OE

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