Instruction Manual

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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 - 100 ns

• Low Power Dissipation

– 15mAActiveCurrent

– 40 µA CMOS Standby Current

• Sector Program Operation

– Single Cycle Reprogram (Erase and Program)

– 1024 Sectors (256 Bytes/Sector)

– Internal Address and Data Latches for 256 Bytes

• Two 8K Bytes Boot Blocks with Lockout

• Fast Sector Program Cycle Time - 20 ms

• 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 AT29LV020 is a 3-volt-only in-system Flash programmable and erasable read

only memory (PEROM). Its 2 megabits of memory is organized as 262,144 bytes by

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

offers access times to 100 ns with power dissipation of just 54 mW over the commer-

cial temperature range. 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.

2-megabit

(256K x 8)

3-volt Only

Flash Memory

AT29LV020

Rev. 0565C–FLASH–05/02

PLCC Top View

Pin Configurations

Pin Name Function

A0 - A17 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

NC

VCC

WE

A17

TSOP Top View

Type 1

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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

NC

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.
PAGE 2
To allow for simple in-system reprogrammability, the AT29LV020 does not require high input voltages for programming. Five-volt-only commands determine the operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT29LV020 is performed on a sector basis; 256 bytes of data are loaded into the device and then simultaneously programmed.
PAGE 3
AT29LV020 The address is latched on the falling edge of CE or WE, whichever occurs last. The data is latched by the first rising edge of CE or WE. 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.
PAGE 4
BOOT BLOCK PROGRAMMING LOCKOUT: The AT29LV020 has two designated memory blocks that have a programming lockout feature. This feature prevents programming of data in the designated block once the feature has been enabled. Each of these blocks consists of 8K bytes; the programming lockout feature can be set independently for either block. While the lockout feature does not have to be activated, it can be activated for either or both blocks. These two 8K memory sections are referred to as boot blocks.
PAGE 5
AT29LV020 DC and AC Operating Range Operating Temperature (Case) VCC Power Supply Notes: AT29LV020-10 AT29LV020-12 AT29LV020-20 AT29LV020-25 0°C - 70°C 0°C - 70°C 0°C - 70°C 0°C - 70°C -40°C - 85°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 3.3V ± 0.3V Com. Ind. (1) 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 AT29LV020-10 Symbol Parameter tACC Min Max AT29LV020-12 Min Max AT29LV020-20 Min Max AT29LV020-25 Min Max Units Address to Output Delay 100 120 200 250 ns (1) CE to Output Delay 100 120 200 250 ns tOE(2) OE to Output Delay 0 40 0 50 0 100 0 120 ns CE or OE to Output Float 0 25 0 30 0 50 0 60 ns Output Hold from OE, CE or Address, Whichever Occurred First 0 tCE tDF (3)(4) tOH Note: 0 0 0 ns Not recommended for New Designs.
PAGE 7
AT29LV020 Input Test Waveforms and Measurement Level tR, t F < 5 ns Output Test Load Pin Capacitance f = 1 MHz, T = 25°C(1) Symbol Typ Max Units Conditions CIN 4 6 pF VIN = 0V COUT 8 12 pF VOUT = 0V Note: 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
AT29LV020 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.
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
AT29LV020 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 100 15 120 200 250 Note: Ordering Code Package Operation Range 0.04 AT29LV020-10JC AT29LV020-10TC 32J 32T Commercial (0° to 70°C) 15 0.05 AT29LV020-10JI AT29LV020-10TI 32J 32T Industrial (-40° to 85°C) 15 0.04 AT29LV020-12JC AT29LV020-12TC 32J 32T Commercial (0° to 70°C) 15 0.05 AT29LV020-12JI AT29LV020-12TI 32J 32T Industrial (-40° to 85°C) 15 0.04 AT29LV020-20JC AT29LV020-20TC 32J 32T Commercial (0° to 70°C) 15 0.
PAGE 13
AT29LV020 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.
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