SGS Thomson Microelectronics M29KW064E Datasheet

FEATURES SUMMARY

■ SUPPLY VOLTAGE

–V
–V

■ ACCESS TIME: 90, 110ns

■ PROGRAMMING TIME

2.7V to 3.6V for Read

CC =

11.4V to 12.6V for Program and Erase

PP =

– 9µs per Word typical
– Multiple Word Programming Option (8s

typical Chip Program)

■ ERASE TIME

– 41s typical factory Chip Erase

■ UNIFORM BLOCKS

– 32 blocks of 2 Mbits

■ PROGRAM/ERA SE CONTROLLER

– Embedded Word Program algorithms

■ 10,000 PROGRAM/ERASE CYCLES per

BLOCK

■ ELECTRONIC SIGNATURE

– Manufacturer Code: 0020h
– Device Code : 88AFh

M29KW064E

64 Mbit (4Mb x16, Uniform Block)

3V Supply LightFlash™ Memory

PRODUCT PREVIEW

Figure 1. Packages

TSOP48 (N)

12 x 20mm

FBGA

TFBGA48 (ZA)

6 x 9mm

July 2002

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

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M29KW064E

TABLE OF CONTENTS

FEATURES SUMMARY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Figure 1. Packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Table 1. Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Figure 3. TFBGA Connections (Top view through package). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Figure 4. TSOP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Table 2. Block Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

SIGNAL DESCRIPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Address Inputs (A0-A21). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Data Inputs/Outputs (DQ0-DQ7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Data Inputs/Outputs (DQ8-DQ15 ). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Chip Enable (E). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Output Enable (G). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Write Enable (W). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7

Reset (RP). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Ready/Busy Output (RB). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

V

Supply Voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

CC

V

Program Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

PP

Vss Ground.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

BUS OPERATIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Bus Read. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Bus Write. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Output Disable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Automatic Standby. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Electronic Signature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Table 3. Bus Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

COMMAND INTERFACE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Read/Reset Command.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Auto Select Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Word Program Command.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Multiple Word Program Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9

Setup Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Program Phase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Verify Phase . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Exit Phase. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Block Erase Command.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Chip Erase Command. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Table 4. Standard Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 5. Multiple Word Program Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

Table 6. Program, Erase Times and Program, Erase Endurance Cycles . . . . . . . . . . . . . . . . . . . . 11

Table 7. Multiple Word Program Timings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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M29KW064E

Figure 5. Multiple Word Program Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

STATUS REGISTER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Data Polling Bit (DQ7). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Toggle Bit (DQ6).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Error Bit (DQ5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

VPP Status Bit (DQ4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Erase Timer Bit (DQ3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Alternative Toggle Bit (DQ2).. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Multiple Word Program Bit (DQ0) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Table 8. Status Register Bits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 6. Data Polling Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Figure 7. Data Toggle Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

MAXIMUM RATING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Table 9. Absolute Maximum Ratings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15

DC and AC PARAMETERS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 10. Operating and AC Measurement Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 8. AC Measurement I/O Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Figure 9. AC Measurement Load Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Table 11. Device Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 6

Table 12. DC Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Figure 10. Read AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18

Table 13. Read AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 8

Figure 11. Write AC Waveforms, Write Enable Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Table 14. Write AC Characteristics, Write Enable Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Figure 12. Write AC Waveforms, Chip Enable Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Table 15. Write AC Characteristics, Chip Enable Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22

Figure 13. Reset AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

Table 16. Reset AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23

PACKAGE MECHANICAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Figure 14. TSOP48 - 48 lead Plastic Thin Small Outline, 12 x 20mm, Package Outline . . . . . . . . 24

Table 17. TSOP48 - 48 lead Plastic Thin Small Outline, 12 x 20mm, Package Mechanical Data . 24

Figure 15. TFBGA48 6x9mm - 8x6 ball array, 0.80 mm pitch, Bottom View Package Out line . . . . 25

Table 18. TFBGA48 6x9mm - 8x6 ball array, 0.80 mm pitch, Package Mechanical Data. . . . . . . . 25

Figure 16. TFBGA48 Daisy Chain - Package Connections (Top view through package) . . . . . . . . 26

Figure 17. TFBGA48 Daisy Chain - PCB Connections (Top view through package) . . . . . . . . . . . 27

PART NUMBERING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 19. Ordering Information Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Table 20. Daisy Chain Ordering Scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

REVISION HISTORY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Table 21. Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29

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M29KW064E

SUMMARY DESCRIPTION

The M29KW064E LightFlash™ is a 64 M bit ( 4Mb
x16) non-volatile memory that can be read, erased
and reprogrammed. Read op erations can b e per­formed using a single low voltage (2.7 to 3.6V)
supply. Program an d Er ase operations require an
additional V
power-up the memory defaults to its Read mode
where it can be read in the same way as a ROM or
EPROM.

The memory is divided into 32 uniform blocks that
can be erased i ndependently so it is poss ible to
preserve valid data whi le old data is erased (see
Figures 2, Block Address es). Program a nd Erase
commands are written to the Command Interface
of the memory. An on-chip Program/Erase Con­troller (P/E.C.) 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.

(11.4 to 12.6) power supply. On

PP

The M29KW064E LightFlash™ features a new
command, Multiple Word Program, used to pro­gram large streams of dat a. I t gre atly reduc es t he
total programming time when a large number of
Words are written to the memory at any one time.
Using this command the entire memory can be
programmed in 8s, compared to 36s using the
standard Word Program.

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.

Chip Enable, Output Enable and Write Enable sig­nals control the bus operation of the memory.
They allow simple conne ction to most m icropro­cessors, often without additional logic.

The memory is offered in TSOP48 (12 x 20mm)
and TFBGA48 (6 x 9mm, 0.8mm pitch) packages.
The memory is supplied with all the bits erased
(set to ’1’).

Figure 2. Logic Diagram Table 1. Signal Names

A0-A21 Address Inputs

V

V

22

A0-A21 DQ0-DQ15

W

E

G

RP

M29KW064E

V

CC

SS

PP

16

RB

AI06264

DQ0-DQ15 Data Inputs/Outputs
E
G
W
RP
RB
V

CC

V

PP

V

SS

NC Not Connected Internally

Chip Enable
Output Enable
Write Enable
Reset
Ready/Busy Output
Supply Voltage read
Supply Voltage program erase
Ground

4/30

Figure 3. TFBGA Connections (Top view through package)

M29KW064E

654321

A

B

C

D

E

F

G

H

A3

A4

A2

A1

A0

E

G

V

SS

A7

A17

A6

A5

DQ0

DQ8

DQ9

DQ1

RB

V

PP

A18

A20

DQ2

DQ10

DQ11

DQ3

W

RP

A21

A19

DQ5

DQ12

V

CC

DQ4

A9

A8

A10

A11

DQ7

DQ14

DQ13

DQ6

A13

A12

A14

A15

A16

NC

DQ15

V

SS

AI06265

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M29KW064E

Figure 4. TSOP Connections Table 2. Block Addresses

Block Number Address Range

32 3E0000h-3FFFFFh

A15

1
A14
A13

A12
A11
A10 DQ14

A9
A8

A19
A20

W

RP

A21

V

PP

12

M29KW064E

13

RB

A18

A17

A7
A6

A5
A4

A3
A2
A1

24 25

48

37
36

A16
NC
V

SS

DQ15

DQ7

DQ6
DQ13
DQ5
DQ12
DQ4

V

CC

DQ11
DQ3

DQ10
DQ2
DQ9

DQ1
DQ8
DQ0

G

V

SS

E

A0

31 3C0000h-3DFFFFh
30 3A0000h-3BFFFFh
29 380000h-39FFFFh
28 360000h-37FFFFh
27 340000h-35FFFFh
26 320000h-33FFFFh
25 300000h-31FFFFh
24 2E0000h-2FFFFFh
23 2C0000h-2DFFFFh
22 2A0000h-2BFFFFh
21 280000h-29FFFFh
20 260000h-27FFFFh
19 240000h-25FFFFh
18 220000h-23FFFFh
17 200000h-21FFFFh
16 1E0000h-1FFFFFh
15 1C0000h-1DFFFFh
14 1A0000h-1BFFFFh
13 180000h-19FFFFh

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AI06266

12 160000h-17FFFFh
11 140000h-15FFFFh
10 120000h-13FFFFh

9 100000h-11FFFFh
8 0E0000h-0FFFFFh
7 0C0000h-0DFFFFh
6 0A0000h-0BFFFFh
5 080000h-09FFFFh
4 060000h-07FFFFh
3 040000h-05FFFFh
2 020000h-03FFFFh
1 000000h-01FFFFh

SIGNAL DESCRIPTIONS

See Figure 2, Logic Diagram, and Table 1, Sign al
Names, for a brief overview of the signals connect­ed to this device.

Address Inputs (A0-A21). 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 Program/Erase Con­troller.

Data Inputs/Outputs (DQ0-DQ7). The Data In­puts/Outputs outputs the data stored at the select­ed address during a Bus Rea d operation. Du ring
Bus Write operations they represent the com­mands sent to the Command Interface of the Pro­gram/Erase Controller.

Data Inputs/Outputs (DQ8-DQ15). The Data In­puts/Outputs output the data stored at the selected
address during a Bus Read operation. During Bus
Write operations the Command Register does not
use these bits. When reading t he Status Register
these bits should be ignored.

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.

IH

). 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 (RP

). The Reset pin can be used to apply

a Hardware Reset to the memory.
A Hardware Reset is achieved by holding Reset

Low, V
V

IH

Bus Write operations after t

, fo r at least t

IL

. After Reset goes High,

PLPX

, the memory will be ready for B us Read and

PHEL

or t

RHEL

, which ­ever occurs last. See the Ready/Busy Output sec­tion, Table 16 and Figure 13, Reset AC
Characteristics for more details.

Ready/Busy Output (RB

). The Ready/Busy pin

is an open-drain output that can be used to identify
when the memory array can be read. Ready/Busy
is high-impedance during Read mode and Auto
Select mode. After a Hardware Reset, Bus Read
and Bus Write operations cannot begin until

M29KW064E

Ready/Busy becomes high-impedance. See Table
16 and Figure 13, Reset AC Characteristics.

During Program or Erase operations Ready/Busy
is Low, V
Read/Reset commands or Hardw are Resets until
the memory is ready to enter Read mode.

The use of an open-drain output allows the Ready/
Busy pins from several memories to be connected
to a single pull-up resistor. A Low will then indicate
that one, or more, of the memories is busy.

Supply Voltage. The VCC Supply Voltage

V

CC

supplies the power for Read operations.
The Command Interface is disabled when the V

Supply Voltage is less than the L ockout Voltage,
V

. 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
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

Program Supply Voltage. VPP is both a

V

PP

power supply and Write Protect pin. The two func­tions are selected by t he voltage range a pplied t o
the pin. The Supply Voltage V
before the Program Supply Voltage V

If V

PP

power supply pin for program and erase opera­tions. V
algorithm is completed.

If V

PP

V

is seen as a Write Protect pin. In this case a

PP

voltage lower than V
tion against program or erase, while V
range of V
12, DC Characteristics for the relevant values).

Note that V
nected as the device may become unreliable.

Vss Ground. The V
for all voltage measurements.

. Ready/Busy will remain Low during

OL

Supply Voltage pin and the VSS Ground

CC

.

CC3

must be applied

CC

PP

.

is in the range 11.4V to 12.6V it acts as a

must be stable until the Program/Erase

PP

is kept in a low voltage range (0V to 3.6V)

gives an absolute p rotec-

HH

enables these functions (see Ta ble

HH

must not be left floating o r uncon-

PP

Ground is the reference

SS

in the

PP

CC

7/30

M29KW064E

BUS OPERATIONS

There are six standard bus operations that control
the device. These are Bus Read, Bus Wri te, Out­put Disable, Standby, Automatic Standby and
Electronic Signature. See Tables 3, 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 desired address on the Address
Inputs, applying a Low sig nal, V
and Output Enable and keeping Write Enable
High, V

. The Data Inputs/Outputs will output the

IH

value, see Figure 10, Read Mode AC Waveforms,
and Table 13, 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

IH

Write operation. See Figures 11 and 12, Write AC
Waveforms, and Tables 14 and 15, Write AC

, to Chip Enable

IL

, during the whole Bus

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

.

IH

, the

IH

memory enters Standby mode and the Data In­puts/Outputs pins are placed in the high-imped­ance state. To reduce the S upply Current to the
Standby Supply Current, I
be held within V

± 0.2V. For the Standby current

CC

, Chip Enable should

CC2

level see Table 12, 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-

CC3

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

± 0.2V)

CC

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 Standby Supply Current, I

CC2

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

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 Tables 3, Bus Operations.

Table 3. Bus Operations

V

V

XX

PP

HH

X

XX

XX

Operation E G W

V

IL

V

IH

V

IH

X X X X Hi-Z

V

IL

V

IL

or V

HH

V

IL

V

IL

V

IH

V

IL

V

IL

Bus Read
Bus Write
Output Disable X

Standby
Read Manufacturer

Code

Read Device Code

Note: 1. X = VIL or VIH.

2. XX = V

3. Not necessary for A uto Select or Read/Res et command s.

4. When re adi ng the Status Register during Program or Eras e operations, V

, V

IL

IH

V

IH

V

IL

V

IH

V

IH

V

IH

Address Inputs

A0-A21

(4)

Cell Address Data Output

(3)

Command Address Data Input
X Hi-Z

A0 = V
Others V

A0 = V
Others V

, A1 = VIL,

IL

or V

IL

IH

, A1 = VIL,

IH

or V

IL

IH

must be kept at VHH.

PP

Data Inputs/Outputs

DQ15-DQ0

0020h

88AFh

8/30

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.

Refer to Tables 4 and 5, for a summary of the com­mands.

Read/Reset Command.

The Read/Reset command returns the memory to
its Read mode where it behaves like a ROM or
EPROM, unless otherwise stated. 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.

The Read/Reset Command can be issued, be­tween Bus Write cycles before the start of a pro­gram or erase operation, to return the device to
read mode. Once the program or erase operation
has started the Read/Reset command is no longer
accepted. The Read/Res et co mmand is executed
regardless of the value of V

(VIL, VIH or VHH).

PP

Auto Select Command.

The Auto Select command is used to read the
Manufacturer Code and the Device Code. Three
consecutive Bus Write operations are re quired to
issue the Auto Selec t command. Onc e the Auto
Select command is issued the memory remains in
Auto Select mode until a Read/Reset command is
issued, all other commands are ignored. The Auto
Select command is executed regardless of the val­ue of V

(VIL, VIH or VHH).

PP

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

IL

or VIH.

IL

The Device Code can be read using a B us Read
operation with A0 = V
address bits may be set to either V

and A1 = VIL. The other

IH

or VIH.

IL

Word Progr a m Com m a n d.

The Word Program command can be used to pro­gram a Word to the memory array. V
set to V
ther V

during Word Program. If VPP is set to ei-

HH

or VIH the command will be ignored, the

IL

must be

PP

data will remain unchanged and the device will re­vert to Read/Reset mode. 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.

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 6. Bus Read op­erations during the program o peration will output

M29KW064E

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’.

Multiple Word Program Command

The Multiple Word Program command can be
used to program large streams of data. It greatly
reduces the total programming time when a l arge
number of Words are written to the memory at any
one time. V
Word Progr am. If V
command will be ignored, the data will remain un­changed and the device will revert to Read/Reset
mode.

It has four phases: the Setup P hase to initiate the
command, the Program Phase to program the
data to the memory, the Verify Phase to check that
the data has been correctly programmed and re­program if necessary and the Exit Phase.

Setup Phase. The M ultiple Word Program com­mand requires three Bus Write operations to ini­tiate the command (refer to Table 5, Multiple Word
Program Command and Figure 5, Multiple Word
Program Flowchart). The Status Register Toggle
bit (DQ6) should be checked to verify that the op­eration has started and the Multiple Word Program
bit (DQ0) checked to verify that the P/E.C. is ready
for the first Word.

Program Phase. The Program Phase requires
n+1 cycles, where n is the number of Words, to ex­ecute the programming phase (refer to Table 5,
Multiple Word Program Command and Figure 5,
Multiple Word Program Flowchart).

Three successive steps are required to issue and
execute the Program Phase of the command.

1. The fourth Bus Write operation of the command

latches the Start Address and the first Word to
be programmed. The Status Register Multiple
Word Program bit (DQ0) should be read to
check that the P/E.C. is ready for the next Word.

2. Each subsequent Word to be programmed is

latched with a new Bus Write operation. The
address can remain the Start Address, be
incremented or be any address in the same
block, as the device automatically increments
the address with each sucssesive Bus Write

must be set to VHH during Multiple

PP

is set to e ither V

PP

or VIH the

IL

9/30