User Manual

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1

2

3

4

5

6

7

8

9

1

4-megabit

(512K x 8)

Single 2.7-volt

Battery-Voltage

™

Flash Memory

AT49BV040

AT49LV040

Features

• Single Voltage for Read and Write: 2.7V to 3.6V (BV), 3.0V to 3.6V (LV)

• Fast Read Access Time – 70 ns

• Internal Program Control and Timer

• 16K Bytes Boot Block with Lockout

• Fast Chip Erase Cycle Time – 10 seconds

• Byte-by-byte Programming – 30 µs/Byte Typical

• Hardware Data Protection

• Data Polling for End of Program Detection

• Low Power Dissipation

– 25 mA Active Current

– 50 µA CMOS Standby Current

• Typical 10,000 Write Cycles

• Small Packaging

– 8 x 14 mm VSOP/TSOP

Description

The AT49BV/LV040 are 3-volt only, 4-megabit Flash memories organized as 524,288

words of 8-bits each. Manufactured with Atmel’s advanced nonvolatile CMOS technol-

ogy, the devices offer access times to 70 ns with power dissipation of just 90 mW over

the commercial temperature range. When the device is deselected, the CMOS

standby current is less than 50 µA.

The device contains a user-enabled “boot block” protection feature. The

AT49BV/LV040 locates the boot block at lowest order addresses (“bottom boot”).

Rev. 0679D–03/01

Pin Configurations

Pin Name Function

A0 - A18 Addresses

CE

Chip Enable

OE

Output Enable

WE

Write Enable

I/O0 - I/O7 Data Inputs/Outputs

PLCC Top View

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

VSOP Top View (8 x 14 mm) or

TSOP Top View (8 x 20 mm)

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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

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

(continued)

Summary of content (13 pages)

PAGE 1
Features • • • • • • • • • Single Voltage for Read and Write: 2.7V to 3.6V (BV), 3.0V to 3.
PAGE 2
To allow for simple in-system reprogrammability, the AT49BV/LV040 does not require high input voltages for programming. Three-volt-only commands determine the read and programming operation of the device. Reading data out of the device is similar to reading from an EPROM. Reprogramming the AT49BV/LV040 is performed by erasi ng th e e n ti r e f o ur m e ga bi t s of m e m or y a nd th e n programming on a byte-by-byte basis. The typical byte programming time is a fast 30 µs.
PAGE 3
AT49BV/LV040 code to stay in the device while data in the rest of the device is updated. This feature does not have to be activated; the boot block’s usage as a write-protected region is optional to the user. The address range of the boot block is 00000H to 03FFFH. Once the feature is enabled, the data in the boot block can no longer be erased or programmed. Data in the main memory block can still be changed through the regular programming method.
PAGE 4
Command Definition (in Hex) Command Sequence 1st Bus Cycle Bus Cycles Addr Data Read 1 Addr DOUT Chip Erase 6 5555 Byte Program 4 Boot Block Lockout(1) 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 AA 2AAA 55 5555 80 5555 AA 2AAA 55 5555 10 5555 AA 2AAA 55 5555 A0 Addr DIN 6 5555 AA 2AAA 55 5555 80 5555 AA 2AAA 55 5555 40 Product ID Entry 3 5555 AA 2AAA 55 5555 90 (
PAGE 5
AT49BV/LV040 DC and AC Operating Range Operating Temperature (Case) Com. Ind. VCC Power Supply AT49LV040-70 AT49BV/LV040-90 AT49BV040-12 0°C - 70°C 0°C - 70°C 0°C - 70°C -40°C - 85°C -40°C - 85°C -40°C - 85°C 3.0V to 3.6V 2.7V to 3.6V/3.0V to 3.6V 2.7V to 3.
PAGE 6
AC Read Characteristics AT49LV040-70 Symbol Parameter tACC Min Max AT49BV/LV040-90 Min Max AT49BV040-12 Min Max Units Address to Output Delay 70 90 120 ns (1) CE to Output Delay 70 90 120 ns tOE(2) OE to Output Delay 0 35 0 40 0 50 ns tDF(3)(4) CE or OE to Output Float 0 25 0 25 0 30 ns tOH Output Hold from OE, CE or Address, whichever comes first 0 tCE 0 0 ns AC Read Waveforms(1)(2)(3)(4) Notes: 1.
PAGE 7
AT49BV/LV040 AC Byte Load Characteristics Symbol Parameter tAS, tOES Address, OE Setup Time tAH Address Hold Time tCS Min Max Units 0 ns 100 ns Chip Select Setup Time 0 ns tCH Chip Select Hold Time 0 ns tWP Write Pulse Width (WE or CE) 200 ns tDS Data Setup Time 100 ns tDH, tOEH Data, OE Hold Time 0 ns tWPH Write Pulse Width High 200 ns AC Byte Load Waveforms WE Controlled CE Controlled 7
PAGE 8
Program Cycle Characteristics Symbol Parameter tBP Byte Programming Time tAS Address Setup Time 0 ns tAH Address Hold Time 100 ns tDS Data Setup Time 100 ns tDH Data Hold Time 0 ns tWP Write Pulse Width 200 ns tWPH Write Pulse Width High 200 ns tEC Erase Cycle Time Program Cycle Waveforms Chip Erase Cycle Waveforms Note: 8 OE must be high only when WE and CE are both low.
PAGE 9
AT49BV/LV040 Data Polling Characteristics(1) Symbol Parameter tDH Data Hold Time tOEH OE Hold Time Typ Max ns 10 ns OE to Output Delay Write Recovery Time 1. These parameters are characterized and not 100% tested. 2. See tOE spec in “AC Read Characteristics” on page 6.
PAGE 10
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 LOAD DATA 80 TO ADDRESS 5555 ENTER PRODUCT IDENTIFICATION (2)(3)(4) MODE Software Product Identification Exit LOAD DATA AA TO ADDRESS 5555 LOAD DATA 55 TO ADDRESS 2AAA OR LOAD DATA AA TO ADDRESS 5555 (1) LOAD DATA F0 TO ANY ADDRESS LOAD DATA 55 TO ADDRESS 2AAA EXIT
PAGE 11
AT49BV/LV040 AT49BV/LV040 Ordering Information ICC (mA) tACC (ns) Active Standby 90 25 0.05 120 70 90 25 25 25 0.05 0.05 0.
PAGE 12
Packaging Information 32J, 32-lead, Plastic J-leaded Chip Carrier (PLCC) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-016 AE 32T, 32-lead, Plastic Thin Small Outline Package (TSOP) Dimensions in Millimeters and (Inches)* JEDEC OUTLINE MO-142 BA .045(1.14) X 45˚ PIN NO. 1 IDENTIFY .025(.635) X 30˚ - 45˚ .012(.305) .008(.203) .530(13.5) .490(12.4) .553(14.0) .547(13.9) .595(15.1) .585(14.9) .032(.813) .026(.660) .050(1.27) TYP INDEX MARK 18.5(.728) 18.3(.720) .021(.533) .013(.330) .030(.
PAGE 13
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