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Features

• Single Voltage, Range 3V to 3.6V Supply

• 3-volt Only Read and Write Operation

• Software Protected Programming

• Fast Read Access Time - 150 ns

• Low Power Dissipation

– 15mAActiveCurrent

– 40 µA CMOS Standby Current

• Sector Program Operation

– Single Cycle Reprogram (Erase and Program)

– 2048 Sectors (256 Bytes/Sector)

– Internal Address and Data Latches for 256 Bytes

• Two 16K Bytes Boot Blocks with Lockout

• Fast Sector Program Cycle Time - 20 ms Max.

• Internal Program Control and Timer

• DATA Polling for End of Program Detection

• Typical Endurance > 10,000 Cycles

• CMOS and TTL Compatible Inputs and Outputs

• Commercial and Industrial Temperature Ranges

Description

The AT29LV040A is a 3-volt only in-system Flash Programmable and Erasable Read

Only Memory (PEROM). Its 4 megabits of memory is organized as 524,288 words by

8 bits. Manufactured with Atmel’s advanced nonvolatile CMOS EEPROM technology,

the device offers access times to 150 ns, and a low 54 mW power dissipation. When

the device is deselected, the CMOS standby current is less than 40 µA. The device

endurance is such that any sector can typically be written to in excess of 10,000 times.

The programming algorithm is compatible with other devices in Atmel’s 3-volt only

Flash memories.

4-megabit

(512K x 8)

3-volt Only

256-byte Sector

Flash Memory

AT29LV040A

Rev. 0334F–FLASH–05/02

PLCC Top View

Pin Configurations

Pin Name Function

A0 - A18 Addresses

CE

Chip Enable

OE

Output Enable

WE

Write Enable

I/O0 - I/O7 Data Inputs/Outputs

NC No Connect

5

6

7

8

9

10

11

12

13

29

28

27

26

25

24

23

22

21

A7

A6

A5

A4

A3

A2

A1

A0

I/O0

A14

A13

A8

A9

A11

OE

A10

CE

I/O7

4

3

2

1

32

31

30

14

15

16

17

18

19

20

I/O1

I/O2

GND

I/O3

I/O4

I/O5

I/O6

A12

A15

A16

A18

VCC

WE

A17

TSOP Top View

Type 1

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

32

31

30

29

28

27

26

25

24

23

22

21

20

19

18

17

A11

A9

A8

A13

A14

A17

WE

VCC

A18

A16

A15

A12

A7

A6

A5

A4

OE

A10

CE

I/O7

I/O6

I/O5

I/O4

I/O3

GND

I/O2

I/O1

I/O0

A0

A1

A2

A3

Summary of content (15 pages)

PAGE 1
Features • • • • • • • • • • • • • Single Voltage, Range 3V to 3.6V Supply 3-volt Only Read and Write Operation Software Protected Programming Fast Read Access Time - 150 ns Low Power Dissipation – 15 mA Active Current – 40 µA CMOS Standby Current Sector Program Operation – Single Cycle Reprogram (Erase and Program) – 2048 Sectors (256 Bytes/Sector) – Internal Address and Data Latches for 256 Bytes Two 16K Bytes Boot Blocks with Lockout Fast Sector Program Cycle Time - 20 ms Max.
PAGE 2
To allow for simple in-system reprogrammability, the AT29LV040A does not require high input voltages for programming. Three-volt-only commands determine the operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT29LV040A is performed on a sector basis; 256 bytes of data are loaded into the device and then simultaneously programmed.
PAGE 3
AT29LV040A The 256 bytes of data must be loaded into each sector. Any byte that is not loaded during the programming of its sector will be erased to read FFH. Once the bytes of a sector are loaded into the device, they are simultaneously programmed during the internal programming period. After the first data byte has been loaded into the device, successive bytes are entered in the same manner.
PAGE 4
These two 16K memory sections are referred to as boot blocks. Secure code which will bring up a system can be contained in a boot block. The AT29LV040A blocks are located in the first 16K bytes of memory and the last 16K bytes of memory. The boot block programming lockout feature can therefore support systems that boot from the lower addresses of memory or the higher addresses.
PAGE 5
AT29LV040A DC and AC Operating Range Operating Temperature (Case) AT29LV040A-15 AT29LV040A-20 AT29LV040A-25 0°C - 70°C 0°C - 70°C 0°C - 70°C -40°C - 85°C -40°C - 85°C -40°C - 85°C 3.3V ± 0.3V 3.3V ± 0.3V 3.3V ± 0.3V Com. Ind. VCC Power Supply(1) Notes: 1. After power is applied and VCC is at the minimum specified datasheet value, the system should wait 20 ms before an operational mode is started. 2. Not recommended for New Designs.
PAGE 6
AC Read Characteristics AT29LV040A-15 AT29LV040A-20 AT29LV040A-25 Min Min Min Max Symbol Parameter tACC Address to Output Delay 150 CE to Output Delay 150 tCE (1) tOE (2) tDF (3)(4) tOH Note: Max Max Units 200 250 ns 200 250 ns OE to Output Delay 0 50 0 100 0 120 ns CE or OE to Output Float 0 30 0 50 0 60 ns Output Hold from OE, CE or Address, Whichever Occurred First 0 0 0 ns Not recommended for New Designs. AC Read Waveforms(1)(2)(3)(4) Notes: 6 1.
PAGE 7
AT29LV040A Input Test Waveforms and Measurement Level tR, t F < 5 ns Output Test Load Pin Capacitance f = 1 MHz, T = 25°C(1) Symbol CIN COUT Note: Typ Max Units Conditions 4 6 pF VIN = 0V 8 12 pF VOUT = 0V 1. These parameters are characterized and not 100% tested.
PAGE 8
AC Byte Load Characteristics Symbol Parameter Min Max Units tAS, tOES Address, OE Set-up Time 10 ns tAH Address Hold Time 100 ns tCS Chip Select Set-up Time 0 ns tCH Chip Select Hold Time 0 ns tWP Write Pulse Width (WE or CE) 200 ns tDS Data Set-up Time 100 ns tDH, tOEH Data, OE Hold Time 10 ns tWPH Write Pulse Width High 200 ns AC Byte Load Waveforms(1)(2) WE Controlled CE Controlled Notes: 8 1.
PAGE 9
AT29LV040A Program Cycle Characteristics Symbol Parameter Min Max Units tWC Write Cycle Time 20 ms tAS Address Set-up Time 10 ns tAH Address Hold Time 100 ns tDS Data Set-up Time 100 ns tDH Data Hold Time 10 ns tWP Write Pulse Width 200 ns tBLC Byte Load Cycle Time tWPH Write Pulse Width High 150 200 µs ns Software Protected Program Waveform Notes: 1. OE must be high when WE and CE are both low. 2.
PAGE 10
Data Polling Characteristics(1) Symbol Parameter tDH Data Hold Time tOEH OE Hold Time Min Max OE to Output Delay tWR Write Recovery Time Units 10 ns 10 ns (2) tOE Notes: Typ ns 0 ns 1. These parameters are characterized and not 100% tested. 2. See tOE spec in AC Read Characteristics.
PAGE 11
AT29LV040A Software Product Identification Entry(1) LOAD DATA AA TO ADDRESS 5555 Boot Block Lockout Feature Enable Algorithm(1) LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA 90 TO ADDRESS 5555 PAUSE 20 mS LOAD DATA 80 TO ADDRESS 5555 ENTER PRODUCT IDENTIFICATION MODE(2)(3)(5) LOAD DATA AA TO ADDRESS 5555 Software Product Identification Exit(1) LOAD DATA 55 TO ADDRESS 2AAA LOAD DATA AA TO ADDRESS 5555 LOAD DATA 40 TO ADDRESS 5555 LOAD DATA 55 TO
PAGE 12
Ordering Information ICC (mA) tACC (ns) Active Standby 150 15 200 250 Note: Ordering Code Package Operation Range 0.04 AT29LV040A-15TC AT29LV040A-15JC 32T 32J Commercial (0° to 70°C) 15 0.05 AT29LV040A-15TI AT29LV040A-15JI 32T 32J Industrial (-40° to 85°C) 15 0.04 AT29LV040A-20TC AT29LV040A-20JC 32T 32J Commercial (0° to 70°C) 15 0.05 AT29LV040A-20TI AT29LV040A-20JI 32T 32J Industrial (-40° to 85°C) 15 0.
PAGE 13
AT29LV040A Packaging Information 32J – PLCC 1.14(0.045) X 45˚ PIN NO. 1 IDENTIFIER 1.14(0.045) X 45˚ 0.318(0.0125) 0.191(0.0075) E1 E2 B1 E B e A2 D1 A1 D A 0.51(0.020)MAX 45˚ MAX (3X) COMMON DIMENSIONS (Unit of Measure = mm) D2 Notes: 1. This package conforms to JEDEC reference MS-016, Variation AE. 2. Dimensions D1 and E1 do not include mold protrusion. Allowable protrusion is .010"(0.254 mm) per side.
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32T – TSOP PIN 1 0º ~ 8º c Pin 1 Identifier D1 D L b e L1 A2 E A GAGE PLANE SEATING PLANE COMMON DIMENSIONS (Unit of Measure = mm) A1 MIN NOM MAX A – – 1.20 A1 0.05 – 0.15 A2 0.95 1.00 1.05 D 19.80 20.00 20.20 D1 18.30 18.40 18.50 Note 2 E 7.90 8.00 8.10 Note 2 L 0.50 0.60 0.70 SYMBOL Notes: 1. This package conforms to JEDEC reference MO-142, Variation BD. 2. Dimensions D1 and E do not include mold protrusion. Allowable protrusion on E is 0.
PAGE 15
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