ST M29F002BT, M29F002BNT, M29F002BB, M29F002BNB User Manual

查询M29F002BB120K1供应商

2 Mbit (256Kb x8, Boot Block) Single Supply Flash Memory

■ SINGLE 5V ± 10% SUPPLY VOLTAGE for

PROGRAM, ERAS E and READ O PER AT IONS

■ ACCESS TIME: 45 ns

■ PROGRAMMING TIME

– 8 µs by Byte typical

■ 7 MEMORY BLOCKS

– 1 Boot Block (Top or Bottom Location) – 2 Parameter and 4 Main Blocks

■ PROGRAM/ERA SE CON T ROL LER

– Embedded Byte Program algorithm – Embedded Multi-Block/Chip Erase algorithm – Status Register Polling and Toggle Bits

■ 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 POWER CONSUMPTION

– Standby and Automatic Standby

■ 100,000 PROGRAM/ER ASE CYCL ES per

BLOCK

■ 20 YEARS DATA RETENTION

– Defectivity below 1 ppm/year

■ ELECTRONIC SIGNATURE

– Manufacturer Code: 20h – Top Device Code M29F002BT: B0h – Top Device Code M29F002BNT: B0h – Bottom Device Code M29F002BB: 34h – Bottom Device Code M29F002BNB: 34h

M29F002BT, M29F002BNT

M29F002BB, M29F002BNB

PLCC32 (K)

PDIP32 (P)

Figure 1. Logic Diagram

A0-A17

M29F002BT

M29F002BB M29F002BNT M29F002BNB

TSOP32 (N)

8 x 20mm

DQ0-DQ7

AI02957B

1/22April 2002

M29F002BT, M29F002BB, M29F002BNT, M29F002BNB

Figure 2. PLCC Connections

A16

A7 A6 A5 A4 A3 A2 A1 A0

DQ0

A12

M29F002BNB

DQ1

A15

M29F002BT M29F002BB

DQ2

DQ3

DQ4

DQ5

A17

DQ6

A14 A13 A8 A9 A11 G A10 E DQ7

AI02959B

Figure 3. TSOP Connections

A11 G

A8 A13 A14 A17

CC RP

A16 A15 A12

A4 A3

M29F002BT M29F002BB

16 17

25 24

AI02958

A10 E DQ7 DQ6 DQ5 DQ4 DQ3 V

DQ2 DQ1 DQ0 A0 A1 A2

Figure 4. PDIP Connections

RP V

2 3

A15

A12

M29F002BT

M29F002BB

A4 A3 A2 A1 A0

DQ0

DQ2

M29F002BNT

9 10 11 12 13 14 15 16

32 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17

AI02960

WA16 A17 A14 A13 A8 A9 A11 G A10 E DQ7 DQ6 DQ5DQ1 DQ4 DQ3V

Table 1. Signal Names

A0-A17 Address Inputs DQ0-DQ7 Data Inputs/Outputs E G W

V V

Chip Enable Output Enable Write Enable M29F002BT, M29F002BB:

Reset/Block Temporary Unprotect M29F002BNT, M29F002BNB:

Not Connected Internally Supply Voltage Ground

2/22

M29F002BT, M29F002BB, M29F 002BNT, M29F002BNB

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 T em perature Range", stres ses above t hose listed in the Table "Abs ol ute Maximum Ratings" may

cause permanent damage to the device. These are stress ratings only and operation of the device at these or any other conditions above those indica ted in the Operating sections of this specification i s not impli ed. Exposure to Abs ol ute Maximum Rating conditions for extended periods may affect device reliability. Refer also to the STMicroelectronics SURE Program and other relevant quality docume nts.

2. Mini m um Voltage may undershoot to –2 V 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

SUMMARY DESCRIPTION

The M29F002B is a 2 Mbit (256Kb x8) non-volatile memory that can be read, erased and reprogrammed. These operations can be performed using a single 5V supply. On power-up the memory defaults to its Read mode where it can be read in the same way as a ROM or EPROM. The M29F002B is fully backward com patible with the M29F002.

The memory is divided into blocks that can be erased independently so it is pos sible to pres erve val i d da t a whi l e o l d da t a is erased . Ea c h b l oc k ca n be protected independently to prev ent accidental Program or Erase commands from modifying the memory. Program and Erase com m ands are written to the Command Interface of t he memory . An on-chip Program/Erase Controller simplifies the process of programming or erasing the memory by taking care of all of the special operations that are required to update the memory contents. The end

(1)

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.

The blocks in the memory are asymmetrically arranged, see Tables 3A and 3B, Block Addresses . The first or last 64 Kbyte s have bee n divided into four additional blocks. The 16 Kbyte Boot Block can be used for small initialization code to start the microprocessor, the two 8 Kbyte Parameter Blocks can b e us ed for parameter storage and the remaining 32K is a small Main Block where the application may be stored.

Chip Enable, Output Enable and Write Enable signals control the bus operation of the memory. They allow simple conn ection to most microprocessors, often without additional logic.

The memory is offered in TSOP32 (8 x 20mm), PLCC32 and PDIP packages and it is supplied

with all the bits erased (set to ’1’).

Table 3. Top Boot Block Addresses, M29F002BT, M29F002BNT

6 16 3C000h-3FFFFh 5 8 3A000h-3BFFFh 4 8 38000h-39FFFh 3 32 30000h-37FFFh 2 64 20000h-2FFFFh 1 64 10000h-1FFFFh 0 64 00000h-0FFFFh

Size

(Kbytes)

Address Range

Table 4. Bottom Boot Block Addresses, M29F002BB

6 64 30000h-3FFFFh 5 64 20000h-2FFFFh 4 64 10000h-1FFFFh 3 32 08000h-0FFFFh 2 8 06000h-07FFFh 1 8 04000h-05FFFh 0 16 00000h-03FFFh

Size

(Kbytes)

Address Range

3/22

M29F002BT, M29F002BB, M29F002BNT, M29F002BNB

SIGNAL DESCRIPTIONS

See Figure 1, Logic Diagram, and Table 1, Sign al Names, for a brief overview of the signals connected to this device.

Address Inputs (A0-A17). The Address Inputs select the cells i n the memory array to a ccess during Bus Read operations. During Bus Write 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 the data stored at the selected address during a Bus Read operation. During Bus Write operations they represent the commands sent to the Command Interface of the internal state machine.

Chip Enable (E

). The Chip Enable, E, activates

the memory, allowing Bus Read and Bus Write operations to be performed. When Chip Enable is High, V

Output Enable (G

, all other pins are ignored.

). The Output Enable, G, con-

trols the Bus Read operation of the memory.

Write Enable (W

). The Write Enable, W, controls

the Bus Write operation of the memory’s Command Interf a c e .

Reset/Block Temporary Unprotect (RP

). The Re-

set/Block Temporary Unprotect pin can be used to apply a Hardware Reset to the memory or to temporarily unprotect all blocks that have been protected. On the M29F002BNT the pin is not connected internally and this feature is not available.

A Hardware Reset is achieved by holding Reset/ Block Temporary Unprotect Low, V t

. After Reset/Block Temporary Unprotect

PLPX

goes High, V

, the memory will be ready for Bus

Read and Bus Write operations after t or t

, whichever occurs last. See Table 15 and

PLYH

, for at least

PHEL

Figure 12, Reset/Temporary Unprotect AC Characteristics for more details.

Holding RP

at VID will temporarily unprotect the protected blocks in the memory. Program and Erase operations on all blocks will be possible. The transition from V t

PHPHH

to VID must be slower than

Reset/Block Temporary Unprotect can be left unconnected. A weak internal pull-up resistor ensures that the memory always operates correctly.

Supply Voltage. The VCC Supply Voltage

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

The Command Interface is disabled when the V

Supply Voltage is less than the L ockout Voltage,

. This prevents Bus Write operations from ac-

LKO

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

A 0.1µF capacitor should be connected between the V

Supply Voltage pin and the VSS Ground

pin to decouple the current surges from the power supply. The PCB track widths must be sufficient to carry the currents required during program and erase operations, I

Ground. The VSS Ground is the reference for

CC4

all voltage measurements.

4/22

M29F002BT, M29F002BB, M29F 002BNT, M29F002BNB

BUS OPERATIONS

There are five standard bus operations that control the device. These are Bus Read, Bus Wri te, Output Disable, Standby and Automatic Standby. See Table 5, Bus Operations, for a summary. Typically glitches of less than 5ns on Chip Enabl e o r Write Enable are ignored by t he mem ory 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 desired address on the Address Inputs, applying a Low sig nal, V

, to Chip Enable

and Output Enable and keeping Write Enable High, V

. The Data Inputs/Outputs will output the

value, see Figure 9, Rea d Mode AC Wav eforms, and Table 12, 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 desire d address on t he Address Inputs. The Address Inputs are latched by the Command Interface on the falling edge of Chip Enable or Write Enable, whichever occurs last. The Data Inputs/Outputs a re latched by the Command Interface on the rising edge of Chip Enable or Write Enable, whichever occurs first. Output Enable must remain High, V

, during the whole Bus

Write operation. See Figures 10 and 11, Write AC Waveforms, and Tables 13 and 14, Write AC Characteristics, for details of the timing requirements.

Output Disa bl e . The Data Inputs/Outputs are in the high impedance s tate when Output Enable is High, V

Standby. When Chip Enable is High, V

, 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 V reduced to the TTL Standby Supply Current, I

the Supply Current is

CC2

To further reduce the Supply Current to the CMOS Standby Supply Current, I be held within V

± 0.2V. For Standby current

, Chip Enable should

CC3

levels see Table 11, DC Characteristics. During program or erase operations the memory

will continue to use the Program/Erase Supply Current, I

, for Program or Erase operations un-

CC4

til the operation completes. Automatic Standby. If CMOS levels (V

± 0.2V)

are used to drive the bus and the bus is inactive for 150ns or more the memory enters Automatic Standby where the internal Supply Current is reduced to the CMOS Standby Supply Current, I

CC3

The Data In puts/Outputs will s till 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 Protec tion. These bus operations are intended for use by programming equipment and are not usually used in applications. They require V

to 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 t he signals listed in Table 5, Bus Operations.

Block Protection and Blocks Unprotection. 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 P rotection and Unp rotection to M29 Series Flash.

Table 5. Bus Operations

Operation E G W Add ress Inputs

Bus Read Bus Write Output Disable X Standby Read Manufacturer

Code

Read Device Code

Note: X = VIL or VIH.

Data

Inputs/Outp uts

X X X Hi-Z

V V V

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

B0h (M29F002BT)

B0h (M29F002BNT)

34h (M29F002BB)

20h

5/22

M29F002BT, M29F002BB, M29F002BNT, M29F002BNB

COMMAND INTERFACE

All Bus Write operations t o the me mory are in terpreted by the Command Interface. Commands consist of one or more sequential Bus Write operations. Failure to observe a valid sequence of Bus Write operations will result in the memory returning to Read mode. The long command sequences are imposed to maximize data security.

The commands are summarized in Table 6, Commands. Refer to Table 6 in conjunction with the text descriptions below.

Read/Reset Command. The Read/Reset command returns the memory to its 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 u sed to issue the Read/Reset command.

If the Read/Reset command is issued during a Block Erase operation or following a Programming or Erase error then the memory will take upto 10

µs

to abort. During the abort period no valid data can be read from the mem ory. 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 C ode, t he Device Code and the Block Protection Status. Three consecutive Bus Write operations are required to issue the Auto Select command. Once the Auto Select comma nd is issued the memory remains in Auto Select mode unt il another command is issued.

From the Auto Select mode the Manufacturer Code can be read using a Bus Read operation with A0 = V may be set to either V

and A1 = VIL. The other address bits

or VIH. The Manufa cturer

Code for STMicroelectronics is 20h. The Device Code can be read using a B us Read

operation with A0 = V address bits may be set to e ither V

and A1 = VIL. The other

or VIH. The

Device Code for the M29F002BT is B0h, the M29F002BNT is B0h and the M29F002BB is 34h.

The Block Protecti on St at us of e ac h bl ock can be read using a Bus Rea d operation with A0 = V A1 = V

, and A13-A17 specifying the address of

the block. The other address bits may be set to either V

or VIH. If the addressed block is protected

then 01h is output on the Data Inputs/Outputs, otherwise 00h is output.

Program Command. The Program command can be used to program a value to one address in the memory array at a time. The command requires four Bus Write operations, the final write operation latches the address and data in the internal

state machine and starts the Program/Erase Controller.

If the address falls in a pro tected block then the Program command is ignored, the data remains unchanged. The Status Register is never read and no error condition is given.

During the program operat ion the memo ry will ignore all commands. I t is n ot poss ible t o iss ue any command to abort or pause the operation. Typical program times are given in Table 7. Bus Read operations during the program o peration will output the Status Register on the Data Inputs/Outputs. See the section on the S tatus Register for more details.

After the program operation has completed the memory will return to the Read mode, unle ss an error has occurred. When an error occurs the memory will continue to output the Status Register. A Read/Reset command must be issued to reset the error condition and return to Read mode.

Note that the Program command cannot change a

bit set at ’0’ bac k to ’1’. One of the E rase Commands must be used to set all the bits in a block or in the whole memory from ’0’ to ’1’.

Unlock Bypass Command. The Unlock Bypass command is used in conjunction with the Unlock Bypass Program command to program the memory. When the access time to the device is long (as with some EPROM programmers) considerable time saving can be made by using these commands. Three Bus Write operations are requ ired to issue the Unlock Bypass command.

Once the Unlock Bypas s command has bee n issued the memory will only accept the Unloc k Bypass Program command and the Unlock Bypass Reset command. The memory can be read as if in Read mode.

Unlock Bypass Program Command. The Unlock Bypass Prog ram command can be u sed to program one address in memory at a time. The command requires two B us Write operations, the final write operation latches the address and data in the internal stat e machine and starts th e Program/Erase Controller.

The Program operation using the Unlock Bypass Program command behaves identically to the Program operation using the Program command. A protected block cannot be programmed; the operation cannot be aborted and the Status Register is read. Errors must be reset using the Read/Re set command, which l eaves the d evice in Unlo ck Bypass Mode. See the Program command for details on the behavior.

6/22

M29F002BT, M29F002BB, M29F 002BNT, M29F002BNB

Table 6. Commands

Bus Write Operations

Command

Read/Reset

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 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

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 Comman d Interface onl y uses address bi ts A 0-A10 to verify the commands , t he upper address bits are Don’ t C are.

Read/Re set. After a Read/Reset command, read the memory as normal until another command is issued. Auto Select. After an Auto S el ect command, read Manufacturer ID, Device ID or Block Prot ection Status. Program, Unlock Bypass Pr o g ram, Chip Erase, Block Eras e. After these comm ands rea d the S tatus Regist er until the P rogram /Erase

Controller completes a nd the memory ret urns to Read Mod e. Add additio nal Blocks durin g B l ock Erase Comm and with additional Bus Write Operation s until the Time out Bit is set.

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 as normal until another command is issued. Erase Suspend. After the Erase Suspend command read non-erasing memory blocks as normal, issue Auto Select and Program commands

on non-era sing blocks as normal. Erase Resume. A fte r th e Er as e Res ume com man d th e sus pe nded Eras e o perat ion re sumes , re ad the Stat us R eg ister unt il t he Prog ram/

Erase Cont roller completes and the memory retur ns to Read Mode.

1X F0 3 555 AA 2AA 55 X F0

2X A0PAPD

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

Length

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

Unlock Bypass Reset Command. The Unlock

Bypass Reset command can be used to return t o Read/Reset mode from Unlock Bypass Mode. Two Bus Write operations are required to issue the Unlock Bypass Reset command.

Chip Erase Command. The Chip Erase command can be used to erase the entire chip. Six Bus Write operations are required to issue the Chip Erase Command and start the Program/Erase Controller.

If any blocks are protected then these are ignored and all the other blocks are erased. If all of the blocks are protect e d th e Chip Erase op erat i on ap-

pears to start but will terminate within about 100µs, leaving the data unchanged. No error condition is given when protected blocks are ignored.

During the erase operation the memory will ignore all commands. It is not possible to issue any command to abort the operation. Typical chip erase times are given in Table 7. All Bus Read operations during the Chip E rase operation will output the Status Register on the Data Inputs/Outputs. See the section on the S tatus Register for more details.

After the Chip Erase operation has completed t he memory will return to the Read Mode, unle ss an error has occurred. When an error occurs the memory will continue to output the Status Register. A Read/Reset command must be issued to reset the error condition and return to Read Mode.

The Chip Erase Command sets all of the bits in unprotected blocks of the memory to ’1’. All previous data is lost.

7/22

+ 15 hidden pages

ST M29F002BT, M29F002BNT, M29F002BB, M29F002BNB User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual