SGS Thomson Microelectronics M29F400BT90N6, M29F400BT70N6, M29F400BT70N1, M29F400BT70M1, M29F400BT55N1 Datasheet

...

4 Mbit (512Kb x8 or 256Kb x16, Boot Block)

■ SINGLE 5V±10% SUPPLY VOLTAGE for

PROGRAM, ERASE and READ OPERATIONS

■ ACCESS TIME: 45ns

■ PROGRAMMING TIME

–8µs per Byte/Word typical

■ 11 MEMORY BLOCKS

– 1 Boot Block (Top or Bottom Location) – 2 Parameter and 8 Main Blocks

■ PROGRAM/ERASE CONTROLLER

– Embedded Byte/Word Program algorithm – Embedded Multi-Block/Chip Erase algorithm – Status Register Polling and Toggle Bits – Ready/Busy Output Pin

■ ERASE SUSPEND and RESUME MODES

– Read and Program another Block during

Erase Suspend

■ UNLOCK BYPASS PROGRAM COMMAND

– Faster Production/Batch Programming

■ TEMPORARY BLOCK UNPROTECTION

MODE

■ LOW POWERCONSUMPTION

– Standby and Automatic Standby

■ 100,000 PROGRAM/ERASE CYCLESper

BLOCK

■ 20 YEARS DATA RETENTION

– Defectivity below 1 ppm/year

■ ELECTRONIC SIGNATURE

– Manufacturer Code: 0020h – M29F400BT Device Code: 00D5h – M29F400BB Device Code: 00D6h

M29F400BT

M29F400BB

Single Supply Flash Memory

PRELIMINARY DATA

TSOP48(N)

12 x 20mm

Figure 1. Logic Diagram

A0-A17

M29F400BT

M29F400BB

SO44 (M)

DQ0-DQ14

DQ15A–1 BYTE RB

AI02904

October 1999

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice.

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M29F400BT, M29F400BB

Figure 2A. TSOP Connections

A15 A14 A13 A12 A11 A10 DQ14

NC NC

RP NC NC RB NC

A17

A9 A8

M29F400BT M29F400BB

A7 A6 A5 A4 A3 A2 A1

24 25

37 36

AI02905

A16 BYTE V

DQ15A–1 DQ7

DQ6 DQ13 DQ5 DQ12 DQ4 V

DQ11 DQ3 DQ10 DQ2 DQ9 DQ1 DQ8 DQ0 G V

E A0

Figure 2B. SO Connections

NC RP

A17 A8

DQ0 DQ8

DQ9

DQ10

DQ3

DQ11

A7 A6 A5 A4 A3 A2 A1 A0

1 2 3 4 5 6 7 8 9 10 11

M29F400BT

M29F400BB

12 13 14 15 16 17DQ1 18 19 20 21

44 43 42 41 40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 2322

AI02906

WRB

A9 A10 A11 A12 A13 A14 A15 A16 BYTE V

DQ15A–1 DQ7 DQ14 DQ6 DQ13 DQ5DQ2 DQ12 DQ4 V

Table 1. Signal Names

A0-A17 Address Inputs DQ0-DQ7 Data Inputs/Outputs DQ8-DQ14 Data Inputs/Outputs DQ15A–1 Data Input/Output or Address Input E Chip Enable G Output Enable W Write Enable RP Reset/Block Temporary Unprotect RB Ready/Busy Output BYTE Byte/Word Organization Select V

NC Not Connected Internally

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Supply Voltage Ground

SUMMARY DESCRIPTION

The M29F400B is a 4 Mbit (512Kb x8 or 256Kb x16) non-volatile memorythat canbe read,erased and reprogrammed. These operations can be performed using a single 5V supply.On power-up the memory defaultsto its Readmode where it can be read in the same way as a ROM or EPROM. The M29F400B is fully backward compatible with the M29F400.

The memory is divided into blocks that can be erased independently so it is possible to preserve valid data while olddata is erased. Each block can be protected independently to prevent accidental Program or Erase commands from modifying the memory. Program and Erase commands arewritten to the Command Interface of the memory. An on-chip Program/Erase Controller simplifies the process of programming or erasingthe memoryby taking care of all of the specialoperations that are required to update the memory contents. The end of a program or erase operation can be detected and any error conditions identified. The command set required to control the memory is consistent with JEDEC standards.

M29F400BT, M29F400BB

Table 2. Absolute Maximum Ratings

Symbol Parameter Value Unit

Ambient Operating Temperature (Temperature Range Option 1) 0 to 70 °C

BIAS

STG

(2)

Note: 1. Except for the rating ”Operating Temperature Range”, stresses above those listed in the Table ”Absolute Maximum Ratings” may

cause permanent damage to the device. These are stress ratings only and operation of the device atthese or any other conditions above those indicated in the Operating sections of this specification is not implied. Exposure to Absolute Maximum Rating conditions forextended periods may affect device reliability. Refer also tothe STMicroelectronics SURE Program and other relevantquality documents.

2. Minimum Voltage may undershoot to –2V during transition and for less than 20ns during transitions.

Ambient Operating Temperature (Temperature Range Option 6) –40 to 85 °C Ambient Operating Temperature (Temperature Range Option 3) –40 to 125 °C Temperature Under Bias –50 to 125 °C

Storage Temperature –65 to 150 °C Input or Output Voltage –0.6 to 6 V Supply Voltage –0.6 to 6 V

Identification Voltage –0.6 to 13.5 V

The blocks in the memory are asymmetrically arranged, see Tables 3A and 3B, Block Addresses. The first or last 64 Kbytes have been divided into four additional blocks. The 16 Kbyte Boot Block can beused forsmall initialization codeto startthe microprocessor, the two 8 Kbyte Parameter Blocks can be used for parameter storage and the remaining 32K is a small MainBlock wherethe application may be stored.

Chip Enable, OutputEnable andWrite Enable signals control the bus operation of the memory. They allow simple connection to most microprocessors, often without additional logic.

The memory is offered in TSOP48 (12 x 20mm) and SO44 packages. Access times of45ns, 55ns, 70ns and 90ns are available. The memory is supplied with all the bits erased (set to ’1’).

SIGNAL DESCRIPTIONS

See Figure 1, Logic Diagram, and Table 1, Signal Names, for a brief overview of thesignals connected to this device.

Address Inputs (A0-A17). The Address Inputs select the cells in the memory array to access during Bus Read operations. During BusWrite operations they control the commands sent to the Command Interface of the internal state machine.

Data Inputs/Outputs (DQ0-DQ7). The Data Inputs/Outputs output thedata stored atthe selected address during a Bus Readoperation. During Bus Write operations they represent the commands

(1)

sentto theCommand Interface ofthe internal state machine.

Data Inputs/Outputs (DQ8-DQ14). The Data Inputs/Outputs output thedata stored at theselected address during a Bus Readoperation when BYTE is High, VIH. When BYTE is Low, VIL, these pins are not usedand are high impedance.During Bus Write operations the Command Register does not use these bits. When reading the Status Register these bits should be ignored.

Data Input/Output or Address Input (DQ15A-1).

When BYTE is High, VIH, this pin behaves as a Data Input/Output pin (as DQ8-DQ14). When BYTE is Low, VIL, this pin behaves as an address pin; DQ15A–1Low will select the LSB of theWord on the other addresses, DQ15A–1 High will select the MSB. Throughout the text consider references to the Data Input/Output to include this pin when BYTE is High and references to the Address Inputs to include this pin when BYTE is Low except when stated explicitly otherwise.

Chip Enable (E). The Chip Enable, E, activates the memory, allowing BusRead and Bus Write operations to be performed. When Chip Enable is High, VIH, all other pins are ignored.

Output Enable (G). The Output Enable, G, controls the Bus Read operation of the memory.

Write Enable (W). The Write Enable, W, controls the Bus Write operation of the memory’s Command Interface.

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M29F400BT, M29F400BB

Table 3A. M29F400BT Block Addresses

Size

(Kbytes)

16 7C000h-7FFFFh 3E000h-3FFFFh

8 7A000h-7BFFFh 3D000h-3DFFFh

8 78000h-79FFFh 3C000h-3CFFFh 32 70000h-77FFFh 38000h-3BFFFh 64 60000h-6FFFFh 30000h-37FFFh 64 50000h-5FFFFh 28000h-2FFFFh 64 40000h-4FFFFh 20000h-27FFFh 64 30000h-3FFFFh 18000h-1FFFFh 64 20000h-2FFFFh 10000h-17FFFh 64 10000h-1FFFFh 08000h-0FFFFh 64 00000h-0FFFFh 00000h-07FFFh

Address Range

(x8)

Address Range

(x16)

Reset/BlockTemporaryUnprotect(RP). The Re-

set/Block Temporary Unprotect pin can be used to apply a Hardware Reset to the memory or totemporarily unprotect all Blocks that have been protected.

A Hardware Reset is achieved by holding Reset/ Block Temporary Unprotect Low, VIL, for at least t

. After Reset/Block Temporary Unprotect

PLPX

goes High,VIH, the memory will be ready for Bus Read and Bus Write operations after t t

, whicheveroccurs last. See the Ready/Busy

RHEL

PHEL

Output section, Table 14 and Figure 10, Reset/ Temporary Unprotect AC Characteristics for more details.

Holding RP at VIDwill temporarily unprotect the protected Blocks in the memory. Program and Erase operations on all blocks will be possible. The transition from VIHtoVIDmust be slower than t

PHPHH

Ready/Busy Output (RB). The Ready/Busy pin is anopen-drain output thatcan beused toidentify when the memory array can be read. Ready/Busy is high-impedanceduring Readmode, AutoSelect mode and Erase Suspend mode.

After a Hardware Reset, Bus Read and Bus Write operations cannot begin until Ready/Busy becomes high-impedance. See Table14 and Figure 10, Reset/Temporary Unprotect AC Characteristics.

During Program or Erase operations Ready/Busy is Low, VOL. Ready/Busy will remain Low during

Table 3B. M29F400BB Block Addresses

Size

(Kbytes)

64 70000h-7FFFFh 38000h-3FFFFh 64 60000h-6FFFFh 30000h-37FFFh 64 50000h-5FFFFh 28000h-2FFFFh 64 40000h-4FFFFh 20000h-27FFFh 64 30000h-3FFFFh 18000h-1FFFFh 64 20000h-2FFFFh 10000h-17FFFh 64 10000h-1FFFFh 08000h-0FFFFh 32 08000h-0FFFFh 04000h-07FFFh

8 06000h-07FFFh 03000h-03FFFh 8 04000h-05FFFh 02000h-02FFFh

16 00000h-03FFFh 00000h-01FFFh

Address Range

(x8)

Address Range

(x16)

Read/Reset commands or Hardware Resets until the memory is ready to enter Read mode.

The use ofan open-drain output allowsthe Ready/ Busy pins fromseveral memories tobe connected to asingle pull-up resistor. A Low will then indicate that one, or more, of the memories is busy.

Byte/WordOrganizationSelect(BYTE). The Byte/ Word OrganizationSelect pinis used to switch between the 8-bitand 16-bit Bus modes of the memory. When Byte/Word Organization Select is Low, VIL, the memory is in 8-bit mode, when it is High, VIH, the memory is in 16-bit mode.

VCCSupply Voltage. The VCCSupply Voltage supplies the power for all operations (Read, Program, Erase etc.).

The Command Interface is disabledwhen the V

Supply Voltage is less than the Lockout Voltage, V

. Thisprevents Bus Write operationsfrom ac-

LKO

cidentally damaging the data during power up, power down and power surges. If the Program/ Erase Controller is programming orerasing during this time thenthe operation aborts and the memory contents being altered will be invalid.

A 0.1µF capacitor should be connected between the VCCSupply Voltage pin and the VSSGround pin to decouplethe current surges from the power supply. The PCB track widthsmust be sufficient to carry the currents required during program and erase operations, I

CC4

Vss Ground. The VSSGround is the reference for all voltage measurements.

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M29F400BT, M29F400BB

Table 4A. Bus Operations, BYTE = V

Operation E G W

Bus Read V Bus Write Output Disable X Standby Read Manufacturer

Code

Read Device Code

Note: X = VILor VIH.

X X X Hi-Z Hi-Z

Table 4B. Bus Operations, BYTE = V

Operation E G W

Bus Read Bus Write Output Disable X Standby Read Manufacturer

Code

Read Device Code

Note: X = VILor VIH.

X X X Hi-Z

Address Inputs

DQ15A–1, A0-A17

Cell Address Hi-Z Data Output

Command Address Hi-Z Data Input

X Hi-Z Hi-Z

A0 = VIL,A1=VIL,A9=VID,

Others V A0 = VIH,A1=VIL,A9=VID,

Others V

or V

Address Inputs

A0-A17

Cell Address Data Output

Command Address Data Input

X Hi-Z

A0 = VIL,A1=VIL,A9=VID,

Others V A0 = VIH,A1=VIL,A9=VID,

Others V

or V

Data Inputs/Outputs

DQ14-DQ8 DQ7-DQ0

Hi-Z 20h

Hi-Z

D5h (M29F400BT) D6h (M29F400BB)

Data Inputs/Outputs

DQ15A–1, DQ14-DQ0

0020h

00D5h (M29F400BT) 00D6h (M29F400BB)

BUS OPERATIONS

There are five standardbusoperations that control the device. These are Bus Read, Bus Write, Output Disable, Standby and Automatic Standby. See Tables 4A and 4B, Bus Operations, for a summary. Typically glitches of less than 5ns on Chip Enable or Write Enable are ignored by the memory and do not affect bus operations.

Bus Read. Bus Read operations read from the memory cells, or specific registers in the Command Interface. A valid Bus Read operation involves setting the desiredaddress on the Address Inputs, applying a Low signal, VIL, to Chip Enable and Output Enable and keeping Write Enable High, VIH. The Data Inputs/Outputs will output the value, see Figure 7, Read Mode AC Waveforms, and Table 11, Read AC Characteristics, for details of when the output becomes valid.

Bus Write. Bus Write operations write to the Command Interface. A valid Bus Write operation begins by setting the desired address on the Address Inputs. The Address Inputs are latched by the Command Interface onthe falling edgeof Chip Enable or Write Enable, whichever occurs last. The Data Inputs/Outputs are latched by the Command Interface on the rising edge of Chip Enable or Write Enable,whichever occursfirst.OutputEnable must remain High, VIH, during the whole Bus Write operation. See Figures 8 and 9, Write AC Waveforms, and Tables 12 and 13, Write AC Characteristics, for details of the timing requirements.

Output Disable. The Data Inputs/Outputs are in the high impedance state when Output Enable is High, VIH.

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M29F400BT, M29F400BB

Standby. When Chip Enable is High, VIH, the

Data Inputs/Outputs pins are placed in the highimpedance state and the Supply Current is reduced to the Standby level.

When Chip Enable is at VIHthe Supply Current is reduced to the TTL Standby Supply Current,I

CC2

To furtherreduce the SupplyCurrent tothe CMOS Standby Supply Current, I

, ChipEnable should

CC3

be held within VCC± 0.2V. For Standby current levels see Table 10, DC Characteristics.

During program or erase operations the memory will continue to use the Program/Erase Supply Current, I

, forProgram or Erase operationsun-

CC4

til the operation completes. AutomaticStandby. If CMOS levels (VCC± 0.2V)

are usedto drive thebus and the busis inactivefor 150ns or more the memory enters Automatic Standby where the internal Supply Current is reduced tothe CMOS Standby Supply Current,I

CC3

The Data Inputs/Outputs will still output data if a Bus Read operation is in progress.

Special Bus Operations

Additional bus operations can be performed to read the Electronic Signature and also to apply and remove Block Protection. These bus operations are intended for use by programming equipment and are not usually used in applications. They require VIDto be applied to some pins.

Electronic Signature. The memory has two codes, the manufacturer code and the device code, that can be read to identify the memory. These codes can be read by applying the signals listed in Tables 4A and 4B, Bus Operations.

Block Protection andBlocksUnprotection. Each block can be separately protected against accidental Program or Erase.Protected blocks can be unprotected to allow data to be changed.

There are two methods available for protecting and unprotecting the blocks, one for use on programming equipment and the other for in-system use. For further information refer to Application Note AN1122, Applying Protection and Unprotection to M29 Series Flash.

COMMAND INTERFACE

All Bus Write operations to the memory are interpreted by the Command Interface. Commands consist of one or more sequential Bus Write operations. Failure toobserve a valid sequence of Bus

Write operations will result in the memory returning to Readmode. The long command sequences are imposed to maximize data security.

The address used for the commands changes depending on whether the memory is in 16-bit or 8bit mode. See either Table 5A, or 5B, depending on the configuration that is being used, for a summary of the commands.

Read/Reset Command. The Read/Reset command returns the memory toits Read mode where it behaves like a ROM or EPROM. It also resets the errors in the Status Register. Either one or three Bus Write operations can be used to issue

the Read/Reset command. If the Read/Reset command is issued during a

Block Erase operation orfollowing a Programming or Erase error then the memory will takeupto 10µs to abort. During the abort period no validdata can be read from the memory. Issuing a Read/Reset command during a Block Erase operation will leave invalid data in the memory.

Auto Select Command. The Auto Select command is used to read the Manufacturer Code, the Device Code and the Block Protection Status. Three consecutive Bus Write operations are required to issue the Auto Select command. Once the Auto Select command is issued the memory remains in Auto Select mode until another command is issued.

From the Auto Select mode the Manufacturer Code can be read using a Bus Read operation with A0 = VILandA1 = VIL. The otheraddress bits may be set to either VILor VIH. The Manufacturer Code for STMicroelectronics is 0020h.

The Device Code can be read using a Bus Read operation with A0 = VIHand A1 = VIL. The other address bits may be set to either VILor VIH. The Device Code for the M29F400BT is 00D5h and for the M29F400BB is 00D6h.

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M29F400BT, M29F400BB

Table 5A. Commands, 16-bit mode, BYTE = V

Bus Write Operations

Command

Read/Reset

1X F0 3 555 AA 2AA 55 X F0

1st 2nd 3rd 4th 5th 6th

Length

Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data

Auto Select 3 555 AA 2AA 55 555 90 Program 4 555 AA 2AA 55 555 A0 PA PD Unlock Bypass 3 555 AA 2AA 55 555 20 Unlock Bypass

Program

2X A0PAPD

Unlock Bypass Reset 2 X 90 X 00 Chip Erase 6 555 AA 2AA 55 555 80 555 AA 2AA 55 555 10 Block Erase 6+ 555 AA 2AA 55 555 80 555 AA 2AA 55 BA 30 Erase Suspend 1 X B0 Erase Resume 1 X 30

Table 5B. Commands, 8-bit mode, BYTE = V

Bus Write Operations

Command

Read/Reset

1X F0 3 AAA AA 555 55 X F0

1st 2nd 3rd 4th 5th 6th

Length

Addr Data Addr Data Addr Data Addr Data Addr Data Addr Data

Auto Select 3 AAA AA 555 55 AAA 90 Program 4 AAA AA 555 55 AAA A0 PA PD Unlock Bypass 3 AAA AA 555 55 AAA 20 Unlock Bypass

Program

2X A0PAPD

Unlock Bypass Reset 2 X 90 X 00 Chip Erase 6 AAA AA 555 55 AAA 80 AAA AA 555 55 AAA 10 Block Erase 6+ AAA AA 555 55 AAA 80 AAA AA 555 55 BA 30 Erase Suspend 1 X B0 Erase Resume 1 X 30

Note: X Don’t Care, PA Program Address, PD Program Data, BA Any address in the Block. All values in the table are in hexadecimal.

The Command Interface only uses A–1, A0-A10 and DQ0-DQ7 to verify the commands; A11-A17, DQ8-DQ14 and DQ15 are Don’t Care. DQ15A–1 is A–1 when BYTE is V

Read/Reset. After a Read/Reset command, read the memory as normal until another command is issued. Auto Select. After an Auto Select command, readManufacturer ID, Device ID or Block Protection Status. Program, Unlock Bypass Program, Chip Erase, BlockErase. After these commands read the Status Register until the Program/Erase

Controller completes and the memory returns to Read Mode. Add additional Blocks during Block Erase Command with additional Bus Write Operations until Timeout Bit isset.

Unlock Bypass. After the Unlock Bypass command issue Unlock Bypass Program or Unlock Bypass Reset commands. Unlock Bypass Reset. After the Unlock Bypass Reset command read the memory asnormal until another command is issued. Erase Suspend. After the EraseSuspend command readnon-erasing memory blocks as normal, issue AutoSelect and Program commands

on non-erasing blocks as normal. Erase Resume. After the Erase Resume command the suspended Erase operation resumes, read the Status Register until the Program/

Erase Controller completes and the memory returns to Read Mode.

or DQ15when BYTE is VIH.

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