STMicroelectronics M29W008EB90N6E 8 mbit (1mb x 8, boot block) 3v supply flash memory Datasheet

M29W008ET
M29W008EB
8 Mbit (1Mb x 8, Boot Block)
3V Supply Flash Memory
FEATURES SUMMARY
■
ACCESS TIMES: 70ns, 90ns
■
PROGRAMMING TIME: 10µs per Byte typical
■
PROGRAM/ERASE CONTROLLER (P/E.C.)
– Embedded Byte Program Algorithm
– Status Register bits and Ready/Busy
Output
■
19 MEMORY BLOCKS
– 1 Boot Block (Top or Bottom location)
– 2 Parameter and 16 Main Blocks
■
BLOCK, MULTI-BLOCK and CHIP ERASE
■
MULTIPLE BLOCK PROTECTION/
TEMPORARY UNPROTECTION MODE
■
ERASE SUSPEND and RESUME MODES
■
LOW POWER CONSUMPTION
– Standby and Automatic Standby modes
■
100,000 PROGRAM/ERASE CYCLES per
BLOCK
■
20 YEARS DATA RETENTION
– Defectivity below 1ppm/year
■
ELECTRONIC SIGNATURE
– Manufacturer Code: 20h
– M29W008ET Device Code: D2h
– M29W008EB Device Code: DCh
■
ECOPACK® TSOP40 PACKAGE
June 2005
Figure 1.
Package
TSOP40 (N)
10 x 20mm
Rev 0.1
1/43
www.st.com
1
M29W008ET, M29W008EB
Contents
1
Summary description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2
Signal descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3
2.1
Address Inputs (A0-A19) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.2
Data Input/Outputs (DQ0-DQ7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.3
Chip Enable (E) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.4
Output Enable (G) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.5
Write Enable (W) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.6
Ready/Busy Output (RB) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.7
Reset/Block Temporary Unprotect Input (RP) . . . . . . . . . . . . . . . . . . . . . . . . .11
2.8
VCC Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
2.9
VSS Ground . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
Bus Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1
3.2
4
2/43
Standard bus operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.1
Bus Read . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.2
Bus Write . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.3
Output Disable . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.4
Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
3.1.5
Automatic Standby . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Special bus operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.1
Read Electronic Signature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
3.2.2
Block Protection and Unprotection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Command interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.1
Read/Reset command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.2
Auto Select command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.3
Program command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
4.4
Unlock Bypass command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.5
Unlock Bypass Program command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.6
Unlock Bypass Reset command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.7
Block Erase command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
M29W008ET, M29W008EB
5
4.8
Chip Erase command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.9
Erase Suspend command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
4.10
Erase Resume Command . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Status register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.1
Data Polling Bit (DQ7) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.2
Toggle Bit (DQ6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
5.3
Error Bit (DQ5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.4
Erase Timer Bit (DQ3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
5.5
Alternative Toggle Bit (DQ2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
6
Maximum rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
7
DC and AC characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
8
Package mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
9
Part numbering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Appendix A Block address table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Appendix B Block protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
10
9.1
Programmer technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
9.2
In-System technique . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
3/43
M29W008ET, M29W008EB
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Table 15.
Table 16.
Table 17.
Table 18.
Table 19.
4/43
Signal Names . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Bus Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Program, Erase Times and Program, Erase Endurance Cycles. . . . . . . . . . . . . . . . . . . . . 19
Status Register Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Operating and AC Measurement Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Device Capacitance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
DC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Read AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Write AC Characteristics, W Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Write AC Characteristics, E Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Reset/Block Temporary Unprotect AC Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
TSOP40 - 40 lead Plastic Thin Small Outline, 10 x 20mm, Package Mechanical Data . . . 32
Ordering Information Scheme. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Top Boot Block Addresses, M29W008ET . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Bottom Boot Block Addresses, M29W008EB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Programmer Technique Bus Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Document Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
M29W008ET, M29W008EB
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Logic diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
TSOP Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Block Addresses (Top Boot Block) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Block Addresses (Bottom Boot Block) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Data Polling Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Data Toggle Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
AC Testing Input Output Waveform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
AC Testing Load Circuit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Read Mode AC Waveforms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Write AC Waveforms, W Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Write AC Waveforms, E Controlled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Reset/Block Temporary Unprotect AC Waveforms. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
TSOP40 - 40 lead Plastic Thin Small Outline, 10 x 20mm, Package Outline . . . . . . . . . . . 32
Programmer Equipment Block Protect Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Programmer Equipment Chip Unprotect Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
In-System Equipment Block Protect Flowchart. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
In-System Equipment Chip Unprotect Flowchart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
5/43
M29W008ET, M29W008EB
1 Summary description
1
Summary description
The M29W008E is a 8 Mbit (1Mb x 8) non-volatile Flash memory that can be read, erased at
block, multi-block or chip level and programmed at Byte level. These operations are performed
using a single 2.7V to 3.6V VCC supply voltage. For Program and Erase operations the
necessary high voltages are generated internally. The device can also be programmed using
standard programming equipment.
The memory is divided into blocks that are asymmetrically arranged. Both M29W008ET and
M29W008EB devices have an array of 19 blocks composed of one Boot Block of 16 KBytes,
two Parameter Blocks of 8 KBytes, one Main Block of 32 KBytes and fifteen Main Blocks of 64
KBytes. In the M29W008ET, the Boot Block is located at the top of the memory address space
while in the M29W008EB, it is located at the bottom. The memory maps are showed in
Figure 4: Block Addresses (Top Boot Block) and Figure 5: Block Addresses (Bottom Boot
Block). Each block can be erased and reprogrammed independently so it is possible to
preserve valid data while old data is erased. Program and Erase commands are written to the
Command Interface of the 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 of a program or erase operation can
be detected and any error conditions identified. Erase operations in one block can be
temporarily suspended in order to read from or program in blocks that are not being erased.
Each block can be programmed and erased over 100,000 cycles.
Each block can be protected independently to prevent accidental Program or Erase commands
from modifying the memory. All previously protected blocks can be temporarily unprotected.
In order to meet environmental requirements, ST offers this device in a TSOP40 (10 x 20mm)
ECOPACK® package. ECOPACK® packages are Lead-free and RoHS compliant. The category
of second Level Interconnect is marked on the package and on the inner box label, in
compliance with JEDEC Standard JESD97. The maximum ratings related to soldering
conditions are also marked on the inner box label. ECOPACK is an ST trademark. ECOPACK
specifications are available at: www.st.com.
The device is offered in package and supplied with all the bits erased (set to ’1’).
Table 1.
6/43
Signal Names
A0-A19
Address Inputs
DQ0-DQ7
Data Input/Outputs, Command Inputs
E
Chip Enable
G
Output Enable
W
Write Enable
RP
Reset/Block Temporary Unprotect
RB
Ready/Busy Output
VCC
Supply Voltage
VSS
Ground
NC
Not Connected Internally
M29W008ET, M29W008EB
Figure 2.
1 Summary description
Logic diagram
VCC
20
15
A0-A19
DQ0-DQ7
W
M29W008ET
M29W00EB
E
G
RB
RP
VSS
AI11359
Figure 3.
TSOP Connections
A16
A15
A14
A13
A12
A11
A9
A8
W
RP
NC
RB
A18
A7
A6
A5
A4
A3
A2
A1
1
40
10 M29W008ET 31
11 M29W008EB 30
20
21
A17
VSS
NC
A19
A10
DQ7
DQ6
DQ5
DQ4
VCC
VCC
NC
DQ3
DQ2
DQ1
DQ0
G
VSS
E
A0
AI11360
7/43
M29W008ET, M29W008EB
1 Summary description
Figure 4.
Block Addresses (Top Boot Block)
M29W008ET
Top Boot Block Addresses
FFFFFh
FFFFFh
16 KByte BOOT BLOCK
F0000h
EFFFFh
E0000h
DFFFFh
D0000h
CFFFFh
C0000h
BFFFFh
B0000h
AFFFFh
A0000h
9FFFFh
90000h
8FFFFh
Total of 16
64 KByte Blocks
80000h
7FFFFh
70000h
6FFFFh
60000h
5FFFFh
50000h
4FFFFh
40000h
3FFFFh
30000h
2FFFFh
20000h
1FFFFh
10000h
0FFFFh
64 KByte MAIN BLOCK
8 KByte PARAMETER BLOCK
64 KByte MAIN BLOCK
8 KByte PARAMETER BLOCK
64 KByte MAIN BLOCK
32 KByte MAIN BLOCK
FC000h
FBFFFh
FA000h
F9FFFh
F8000h
F7FFFh
F0000h
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
00000h
AI11361
8/43
M29W008ET, M29W008EB
Figure 5.
1 Summary description
Block Addresses (Bottom Boot Block)
M29W008EB
Bottom Boot Block Addresses
FFFFFh
64 KByte MAIN BLOCK
F0000h
EFFFFh
E0000h
DFFFFh
D0000h
CFFFFh
C0000h
BFFFFh
B0000h
AFFFFh
A0000h
9FFFFh
90000h
8FFFFh
Total of 16
64 KByte Blocks
80000h
7FFFFh
70000h
6FFFFh
60000h
5FFFFh
50000h
4FFFFh
40000h
3FFFFh
30000h
2FFFFh
20000h
1FFFFh
10000h
0FFFFh
00000h
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
64 KByte MAIN BLOCK
0FFFFh
64 KByte MAIN BLOCK
32 KByte MAIN BLOCK
64 KByte MAIN BLOCK
8 KByte PARAMETER BLOCK
64 KByte MAIN BLOCK
8 KByte PARAMETER BLOCK
16 KByte BOOT BLOCK
08000h
07FFFh
06000h
05FFFh
04000h
03FFFh
00000h
AI11362
9/43
2 Signal descriptions
2
M29W008ET, M29W008EB
Signal descriptions
See Figure 2: Logic diagram and Table 1: Signal Names, for a brief overview of the signals
connected to this device.
2.1
Address Inputs (A0-A19)
The address inputs for the memory array are latched during a Bus Write operation on the falling
edge of Chip Enable, E or Write Enable, W. When A9 is raised to VID, either a Read Electronic
Signature Manufacturer or Device Code, Block Protection Status or a Write Block Protection or
Block Unprotection is enabled depending on the combination of levels on A0, A1 A6, A12 and
A15.
2.2
Data Input/Outputs (DQ0-DQ7)
During Bus Write operations, the Data Inputs/Outputs input the data to be programmed in the
memory array or a command to be written to the Command Interface. Both are latched on the
rising edge of Chip Enable, E or Write Enable, W. The Data Inputs/Outputs output the data
stored at the selected address during a Bus Read operation, the Electronic Signature
(Manufacturer or Device codes), the Block Protection Status or the Data Polling bit (DQ7),
Toggle Bits (DQ6) and DQ2), Error bit (DQ5) or Erase Timer bit (DQ3) of the Status Register.
Outputs are valid when Chip Enable, E and Output Enable, G are active. The output is high
impedance when the chip is deselected or the outputs are disabled and when RP is Low.
2.3
Chip Enable (E)
The Chip Enable, E, activates the memory control logic, input buffers, decoders and sense
amplifiers. When Chip Enable is High, VIH, the memory is deselected and the power
consumption is reduced to the Standby level. The Chip Enable, E, can also be used to control
Write operations to the command register and to the memory array, while W remains Low. The
Chip Enable must be forced to VID during Block Unprotection operations.
2.4
Output Enable (G)
The Output Enable, G, gates the outputs through the data buffers during a Bus Read operation.
When G is High, VIH, the outputs are high impedance. G must be forced to VID during Block
Protection and Unprotection operations.
2.5
Write Enable (W)
This Write Enable, W, controls write operations of the memory’s Command Interface.
10/43
M29W008ET, M29W008EB
2.6
2 Signal descriptions
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, Auto Select mode and
Erase Suspend mode.
After a Hardware Reset, Bus Read and Bus Write operations cannot begin until Ready/Busy
becomes high impedance. See Table 13: Reset/Block Temporary Unprotect AC Characteristics
and Figure 13: Reset/Block Temporary Unprotect AC Waveforms.
During Program or Erase operations Ready/Busy is Low, VOL. Ready/Busy will remain Low
during Read/Reset commands or Hardware Resets until the memory is ready to enter Read
mode.
2.7
Reset/Block Temporary Unprotect Input (RP)
The Reset/Block Temporary Unprotect input, RP, can be used to apply a Hardware Reset to the
memory or to temporarily unprotect all blocks that have been previously protected.
A Hardware Reset is achieved by holding RP Low, VIL for at least tPLPX. After Reset/Block
Temporary Unprotect goes High, VIH, if the device is in Read or Standby mode, it will be ready
for new operations tPHEL after the rising edge of RP. If the device is in Erase, Erase Suspend or
Program mode, the Hardware Reset will last tPLYH during which the RB signal will be held at
VIL. The end of the memory Hardware Reset will be indicated by the rising edge of RB. A
Hardware Reset during an Erase or Program operation will corrupt the data being programmed
or the blocks being erased. See Table 13: Reset/Block Temporary Unprotect AC
Characteristics and Figure 13: Reset/Block Temporary Unprotect AC Waveforms.
Holding RP at VID will temporarily unprotect the previously protected blocks in the memory.
Program and Erase operations on all blocks will be possible. The transition of RP from VIH to
VID must slower than tPHPHH.
When RP is returned from VID to VIH all blocks temporarily unprotected will be again protected.
2.8
VCC Supply Voltage
The power supply for all operations (Read, Program and Erase).
A 0.1µF capacitor should be connected between the VCC 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, ICC3
2.9
VSS Ground
VSS is the reference for all voltage measurements.
11/43
3 Bus Operations
3
M29W008ET, M29W008EB
Bus Operations
There are 5 standard bus operations that control the device. These are Bus Read, us Write,
Output Disable, Standby and Automatic Standby. See Table 2: 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 the bus operations.
3.1
Standard bus operations
3.1.1
Bus Read
Bus Read operations are used to output the contents of the Memory Array, the Electronic
Signature, the Status Register or the Block Protection Status. Both Chip Enable E and Output
Enable G must be Low in order to read the output of the memory. A new Bus Read operation is
initiated either on the falling edge of Chip Enable, E, or on any address transition with E at VIL.
See Figure 10: Read Mode AC Waveforms, and Table 10: Read AC Characteristics for details
of the timing requirements.
3.1.2
Bus Write
Bus Write operations are used to write to the Command Interface or to latch input data to be
programmed. A valid Bus Write operation begins by setting the desired address on the 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 are latched by the
Command Interface on the rising edge of Chip Enable or Write Enable, whichever occurs first.
Output Enable must remain High, VIH, during the whole Bus Write operation.
See Figures 11 and 12, Write AC Waveforms and Tables 11 and 12, Write AC Characteristics,
for details of the timing requirements.
3.1.3
Output Disable
The data outputs are high impedance when the Output Enable G is High with Write Enable W
High.
3.1.4
Standby
The memory is in Standby mode when Chip Enable, E, is High and the Program/Erase
Controller is idle. The Supply Current is reduced to the Standby Supply Current, ICC2, and the
outputs are high impedance, independent of the Output Enable G or Write Enable W inputs.
3.1.5
Automatic Standby
If CMOS levels (VCC ± 0.2V) are used to drive the bus and if the bus is inactive (no address
transition, E = VIL) during 150ns or more, the memory automatically enters a Automatic
Standby mode where the Supply Current is reduced to the Standby Supply Current, ICC2. The
Inputs/Outputs will still output data if a Bus Read operation is in progress.
12/43
M29W008ET, M29W008EB
3.2
3 Bus Operations
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 VID to be applied to some
pins.
3.2.1
Read Electronic Signature
The memory has two codes, the Manufacturer code and the Device code, that can be read to
identify the memory.
These codes allow programming equipment or applications to automatically match their
interface to the characteristics of the M29W008E.
The electronic Signature is output either by applying the signals listed in Table 2: Bus
Operations or by issuing an Auto Select command (see Section 4.2: Auto Select command).
3.2.2
Block Protection and Unprotection
Each block can be individually protected against accidental Program or Erase using
programming equipment. 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 (Programmer Technique) and the other for in-system use (In-System
Technique). Block Protect and Chip Unprotect operations are described in Appendix B: Block
protection.
Table 2.
Bus Operations
E
G
W
RP
Address Inputs A0-A19
DQ0DQ7
Byte Read
VIL
VIL
VIH
VIH
Cell Address
Data
Output
Byte Write
VIL
VIH
VIL
VIH
Command Address
Data
Input
Output Disable
VIL
VIH
VIH
VIH
X
Hi-Z
Standby
VIH X(1)
X(1)
VIH
X
Hi-Z
VIL
VIL
VIH
VIH
VIL
VIL
VIH
VIH
Operation
Manufacturer Code
Read
Electronic
signature Device M29W008ET
Code
M29W008EB
A0= VIL, A1= VIL, A9=VID,
others address bits are ‘Don’t Care’
20h
A0= VIH, A1= VIL, A9=VID,
D2h
others address bits are ‘Don’t Care’
DCh
1. X = VIL or VIH.
13/43
4 Command interface
4
M29W008ET, M29W008EB
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 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. All commands start with two
coded cycles which unlock the Command Interface.
Seven commands are available: Read/Reset, Auto Select (to read the Electronic Signature and
the Block Protection Status), Program, Block Erase, Chip Erase, Erase Suspend and Erase
Resume (see Table 3: Commands).
4.1
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 used 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/Reset
command will not abort an Erase operation when issued while in Erase Suspend.
4.2
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 = VIL and A1 = VIL. The other address bits may be set to either VIL or VIH.
The Device Code can be read using a Bus Read operation with A0 = VIH and A1 = VIL. The
other address bits may be set to either VIL or VIH.
The Block Protection Status of each block can be read using a Bus Read operation with A0 =
VIL, A1 = VIH, and A13-A19 specifying the address of the block. The other address bits may be
set to either VIL or VIH. If the addressed block is protected then 01h is output on Data Inputs/
Outputs DQ0-DQ7, otherwise 00h is output.
4.3
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 and starts the Program/Erase Controller.
If the address falls in a protected block then the Program command is ignored, the data
remains unchanged. The Status Register is never read and no error condition is given.
14/43
M29W008ET, M29W008EB
4 Command interface
During the program operation the memory will ignore all commands. It is not possible to issue
any command to abort or pause the operation. Typical program times are given in Table 4:
Program, Erase Times and Program, Erase Endurance Cycles. Bus Read operations during
the program operation will output the Status Register on the Data Inputs/Outputs. See
Section 5: Status register for more details.
After the program operation has completed the memory will return to the Read mode, unless 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’ back to ’1’. One of the Erase
Commands must be used to set all the bits in a block or in the whole memory from ’0’ to ’1’.
4.4
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 required to issue the Unlock Bypass command.
Once the Unlock Bypass command has been issued the memory will only accept the Unlock
Bypass Program command and the Unlock Bypass Reset command. The memory can be read
as if in Read mode.
4.5
Unlock Bypass Program command
The Unlock Bypass Program command can be used to program one address in memory at a
time. The command requires two Bus Write operations, the final write operation latches the
address and data and starts the 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/Reset command, which leaves the device in Unlock Bypass Mode. See the Program
command for details on the behavior.
4.6
Unlock Bypass Reset command
The Unlock Bypass Reset command can be used to return to Read/Reset mode from Unlock
Bypass Mode. Two Bus Write operations are required to issue the Unlock Bypass Reset
command. Read/Reset command does not exit from Unlock Bypass Mode.
4.7
Block Erase command
The Block Erase command can be used to erase a list of one or more blocks. Six Bus Write
operations are required to select the first block in the list. Each additional block in the list can be
selected by repeating the sixth Bus Write operation using the address of the additional block.
The Block Erase operation starts the Program/Erase Controller about 50µs after the last Bus
Write operation. Once the Program/Erase Controller starts it is not possible to select any more
15/43
4 Command interface
M29W008ET, M29W008EB
blocks. Each additional block must therefore be selected within 50µs of the last block. The 50µs
timer restarts when an additional block is selected. The Status Register can be read after the
sixth Bus Write operation. See the Status Register for details on how to identify if the Program/
Erase Controller has started the Block Erase operation.
If any selected blocks are protected then these are ignored and all the other selected blocks
are erased. If all of the selected blocks are protected the Block Erase operation appears to start
but will terminate within about 100µs, leaving the data unchanged. No error condition is given
when protected blocks are ignored.
During the Block Erase operation the memory will ignore all commands except the Erase
Suspend command. Typical program times are given in Table 4: Program, Erase Times and
Program, Erase Endurance Cycles. All Bus Read operations during the Block Erase operation
will output the Status Register on the Data Inputs/Outputs. See the section on the Status
Register for more details.
After the Block Erase operation has completed the memory will return to the Read Mode,
unless 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 Block Erase Command sets all of the bits in the unprotected selected blocks to ’1’. All
previous data in the selected blocks is lost.
4.8
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 protected the Chip Erase operation appears 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 program times are given in Table 4: Program, Erase
Times and Program, Erase Endurance Cycles. All Bus Read operations during the Chip Erase
operation will output the Status Register on the Data Inputs/Outputs. See the section on the
Status Register for more details.
After the Chip Erase operation has completed the memory will return to the Read Mode, unless
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.
4.9
Erase Suspend command
The Erase Suspend Command may be used to temporarily suspend a Block Erase operation
and return the memory to Read mode. The command requires one Bus Write operation.
The Program/Erase Controller will suspend within the Erase Suspend Latency Time after the
Erase Suspend Command is issued (see Table 4: Program, Erase Times and Program, Erase
16/43
M29W008ET, M29W008EB
4 Command interface
Endurance Cycles). Once the Program/Erase Controller has stopped the memory will be set to
Read mode and the Erase will be suspended. If the Erase Suspend command is issued during
the period when the memory is waiting for an additional block (before the Program/Erase
Controller starts) then the Erase is suspended immediately and will start immediately when the
Erase Resume Command is issued. It is not possible to select any further blocks to erase after
the Erase Resume.
During Erase Suspend it is possible to Read and Program cells in blocks that are not being
erased; both Read and Program operations behave as normal on these blocks. If any attempt
is made to program in a protected block or in the suspended block then the Program command
is ignored and the data remains unchanged. The Status Register is not read and no error
condition is given. Reading from blocks that are being erased will output the Status Register.
It is also possible to issue the Auto Select, during an Erase Suspend. The Read/Reset
command must be issued to return the device to Read Array mode before the Resume
command will be accepted.
4.10
Erase Resume Command
The Erase Resume command must be used to restart the Program/Erase Controller from
Erase Suspend. An erase can be suspended and resumed more than once.
17/43
M29W008ET, M29W008EB
4 Command interface
Table 3.
Commands
Command(1)
Length
Bus Write Operations(2)(3)
1st
Add Data
Read/Reset(4)(5)
1
+
X
2nd
Add
3rd
4th
5th
Data Add Data Add Data
F0h
Add
6th
7th
Data Add Data Add Data
Read Memory Array until a new write cycle is initiated.
3
555h AAh 2AAh
+
55h 555h F0h
Read Memory Array until a new write cycle is
initiated.
Auto Select(5)
3
555h AAh 2AAh
+
55h 555h 90h
Read Electronic Signature or Block Protection Status
until a new write cycle is initiated. (6)(7)
Program
4 555h AAh 2AAh
55h 555h A0h
Unlock Bypass
3 555h AAh 2AAh
55h 555h 20h
Unlock Bypass
Program
2
X
A0h
PA
PD
Unlock Bypass
Reset
2
X
90h
X
00h
Chip Erase
6 555h AAh 2AAh
55h 555h 80h 555h AAh 2AAh
55h 555h
10h
Block Erase
6
555h AAh 2AAh
+
55h 555h 80h 555h AAh 2AAh
55h
30h
Erase
Suspend(10)
1
X
B0h
Read until Toggle stops, then read all the data needed from any Block(s) not
being erased then Resume Erase.
Erase Resume
1
X
30h
Read Data Polling or Toggle Bits until Erase completes or Erase is suspended
another time.
PA
PD
Read Data Polling or Toggle Bit until
Program completes.
BA
(8)
AB
(9)
30h
1. Commands not interpreted in this table will default to read array mode.
2. X = Don't Care. PA = Program Address, PD = Program Data, BA = Block Address, AB = Additional Block.
3. For Coded cycles address inputs A15-A19 are don't care.
4. A wait of tPLYH is necessary after a Read/Reset command if the memory was in an Erase or Program mode before starting
any new operation (see Table 10: Read AC Characteristics).
5. The first cycles of the Read/Reset and Auto Select commands are followed by read operations. Any number of read cycles
can occur after the command cycles.
6. Signature Address bits A0, A1, at VIL will output the Manufacturer Code (20h). Address bits A0 at VIH and A1, at VIL will
output the Device Code.
7. Block Protection Address: A0, at VIL, A1 at VIH and A13-A19 within the Block will output the Block Protection status.
8. Read Data Polling, Toggle bits or RB until Erase completes.
9. Optional, Additional Block (AB) addresses must be entered within the erase time-out delay after last write entry, time-out
status can be verified through DQ3 value (see Erase Timer Bit DQ3 description). When full command is entered, read Data
Polling or Toggle bit until Erase has completed or is suspended.
10. During Erase Suspend, Read and Data Program functions are allowed in blocks not being erased.
18/43
M29W008ET, M29W008EB
Table 4.
4 Command interface
Program, Erase Times and Program, Erase Endurance Cycles
Typ(1)(2)
Max(2)
Unit
Chip Erase
12
60(3)
s
Block Erase (64 KBytes)
0.8
6(4)
s
Erase Suspend Latency Time
15
25(3)
µs
Program (Byte)
10
200(3)
µs
Chip Program (Byte by Byte)
12
60(3)
s
Parameter
Program/Erase Cycles (per Block)
Min
100,000
cycles
20
years
Data Retention
1. Typical values measured at room temperature and nominal voltages.
2. Sampled, but not 100% tested.
3. Maximum value measured at worst case conditions for both temperature and VCC after 100,00 program/erase cycles.
4. Maximum value measured at worst case conditions for both temperature and VCC.
19/43
5 Status register
5
M29W008ET, M29W008EB
Status register
The status of the Program/Erase Controller during command execution is indicated by bit DQ7
(Data Polling bit), Toggle bits DQ6 and DQ2 and Error bits DQ3 and DQ5. Any attempt to read
the memory array during Program or Erase command execution will automatically output these
five Status Register bits. The Program/Erase Controller automatically sets bits DQ2, DQ3,
DQ5, DQ6 and DQ7. Other bits (DQ0, DQ1 and DQ4) are reserved for future use and should
be masked (see Table 5: Status Register Bits).
5.1
Data Polling Bit (DQ7)
The Data Polling Bit can be used to identify whether the Program/Erase Controller has
successfully completed its operation or if it has responded to an Erase Suspend. The Data
Polling Bit is output on DQ7 when the Status Register is read.
During Program operations the Data Polling Bit outputs the complement of the bit being
programmed to DQ7. After successful completion of the Program operation the memory returns
to Read mode and Bus Read operations from the address just programmed output DQ7, not its
complement.
During Erase operations the Data Polling Bit outputs ’0’, the complement of the erased state of
DQ7. After successful completion of the Erase operation the memory returns to Read Mode.
In Erase Suspend mode the Data Polling Bit will output a ’1’ during a Bus Read operation within
a block being erased. The Data Polling Bit will change from a ’0’ to a ’1’ when the Program/
Erase Controller has suspended the Erase operation.
Figure 6: Data Polling Flowchart gives an example of how to use the Data Polling Bit. A Valid
Address is the address being programmed or an address within the block being erased.
5.2
Toggle Bit (DQ6)
The Toggle Bit can be used to identify whether the Program/Erase Controller has successfully
completed its operation or if it has responded to an Erase Suspend. The Toggle Bit is output on
DQ6 when the Status Register is read.
During Program and Erase operations the Toggle Bit changes from ’0’ to ’1’ to ’0’, etc., with
successive Bus Read operations at any address. After successful completion of the operation
the memory returns to Read mode.
During Erase Suspend mode the Toggle Bit will output when addressing a cell within a block
being erased. The Toggle Bit will stop toggling when the Program/Erase Controller has
suspended the Erase operation.
If any attempt is made to erase a protected block, the operation is aborted, no error is signalled
and DQ6 toggles for approximately 100µs. If any attempt is made to program a protected block
or a suspended block, the operation is aborted, no error is signalled and DQ6 toggles for
approximately 1µs.
Figure 7: Data Toggle Flowchart gives an example of how to use the Data Toggle bit.
20/43
M29W008ET, M29W008EB
5.3
5 Status register
Error Bit (DQ5)
The Error Bit can be used to identify errors detected by the Program/Erase Controller. The
Error Bit is set to ’1’ when a Program, Block Erase or Chip Erase operation fails to write the
correct data to the memory. If the Error Bit is set a Read/Reset command must be issued
before other commands are issued. The Error bit is output on DQ5 when the Status Register is
read.
Note that the Program command cannot change a bit set to ’0’ back to ’1’ and attempting to do
so will set DQ5 to ‘1’. A Bus Read operation to that address will show the bit is still ‘0’. One of
the Erase commands must be used to set all the bits in a block or in the whole memory from ’0’
to ’1’
5.4
Erase Timer Bit (DQ3)
The Erase Timer Bit can be used to identify the start of Program/Erase Controller operation
during a Block Erase command. Once the Program/Erase Controller starts erasing the Erase
Timer Bit is set to ’1’. Before the Program/Erase Controller starts the Erase Timer Bit is set to ’0’
and additional blocks to be erased may be written to the Command Interface. The Erase Timer
Bit is output on DQ3 when the Status Register is read.
5.5
Alternative Toggle Bit (DQ2)
The Alternative Toggle Bit can be used to monitor the Program/Erase controller during Erase
operations. The Alternative Toggle Bit is output on DQ2 when the Status Register is read.
During Chip Erase and Block Erase operations the Toggle Bit changes from ’0’ to ’1’ to ’0’, etc.,
with successive Bus Read operations from addresses within the blocks being erased. A
protected block is treated the same as a block not being erased. Once the operation completes
the memory returns to Read mode.
During Erase Suspend the Alternative Toggle Bit changes from ’0’ to ’1’ to ’0’, etc. with
successive Bus Read operations from addresses within the blocks being erased. Bus Read
operations to addresses within blocks not being erased will output the memory cell data as if in
Read mode.
After an Erase operation that causes the Error Bit to be set the Alternative Toggle Bit can be
used to identify which block or blocks have caused the error. The Alternative Toggle Bit
changes from ’0’ to ’1’ to ’0’, etc. with successive Bus Read Operations from addresses within
blocks that have not erased correctly. The Alternative Toggle Bit does not change if the
addressed block has erased correctly.
21/43
M29W008ET, M29W008EB
5 Status register
Table 5.
Status Register Bits
Operation
Address
DQ7
DQ6
DQ5
DQ3
DQ2
RB
Program
Any Address
DQ7
Toggle
0
–
–
0
Program During Erase
Suspend
Any Address
DQ7
Toggle
0
–
–
0
Program Error
Any Address
DQ7
Toggle
1
–
–
0
Chip Erase
Any Address
0
Toggle
0
1
Toggle
0
Block Erase before
timeout
Erasing Block
0
Toggle
0
0
Toggle
0
Non-Erasing Block
0
Toggle
0
0
No Toggle
0
Erasing Block
0
Toggle
0
1
Toggle
0
Non-Erasing Block
0
Toggle
0
1
No Toggle
0
Erasing Block
1
No Toggle
0
–
Toggle
1
Block Erase
Erase Suspend
Non-Erasing Block
Data read as normal
1
Good Block Address
0
Toggle
1
1
No Toggle
0
Faulty Block Address
0
Toggle
1
1
Toggle
0
Erase Error
Note:
Figure 6.
Unspecified data bits should be ignored.
Data Polling Flowchart
START
READ DQ5 & DQ7
at VALID ADDRESS
DQ7
=
DATA
YES
NO
NO
DQ5
=1
YES
READ DQ7
at VALID ADDRESS
DQ7
=
DATA
YES
NO
FAIL
PASS
AI03598
22/43
M29W008ET, M29W008EB
Figure 7.
5 Status register
Data Toggle Flowchart
START
READ DQ6
READ
DQ5 & DQ6
DQ6
=
TOGGLE
NO
YES
NO
DQ5
=1
YES
READ DQ6
TWICE
DQ6
=
TOGGLE
NO
YES
FAIL
PASS
AI01370C
23/43
M29W008ET, M29W008EB
6 Maximum rating
6
Maximum rating
Stressing the device above the rating listed in the Absolute Maximum Ratings table may cause
permanent damage to the device. Exposure to Absolute Maximum Rating conditions for
extended periods may affect device reliability. These are stress ratings only and operation of
the device at these or any other conditions above those indicated in the Operating sections of
this specification is not implied. Refer also to the STMicroelectronics SURE Program and other
relevant quality documents.
Table 6.
Absolute Maximum Ratings
Symbol
Parameter
Unit
TBIAS
Temperature Under Bias
–50 to 125
°C
TSTG
Storage Temperature
–65 to 150
°C
TLEAD
Lead Temperature during Soldering(1)
260(2)
°C
VIO(3)
Input or Output Voltage
–0.6 to 5
V
Supply Voltage
–0.6 to 5
V
–0.6 to 13.5
V
VCC
VID(3)
Identification Voltage
1. Compliant with the ST 7191395 specification for Lead-free soldering processes.
2. Not exceeding 250°C for more than 30s, and peaking at 260°C.
3. VID and VIO may undershoot to –2V during transition and for less than 20ns during transitions.
24/43
Value
M29W008ET, M29W008EB
7
7 DC and AC characteristics
DC and AC characteristics
This section summarizes the operating measurement conditions, and the DC and AC
characteristics of the device. The parameters in the DC and AC characteristics Tables that
follow, are derived from tests performed under the Measurement Conditions summarized in
Table 7: Operating and AC Measurement Conditions. Designers should check that the
operating conditions in their circuit match the operating conditions when relying on the quoted
parameters.
Table 7.
Operating and AC Measurement Conditions
M29W008E
Parameter
70
90
Unit
Min
Max
Min
Max
VCC Supply Voltage
2.7
3.6
2.7
3.6
Ambient Operating Temperature (range 6)
–40
85
–40
85
Ambient Operating Temperature (range 1)
0
70
0
70
V
°C
Load Capacitance (CL)
30
Input Rise and Fall Times
10
Input Pulse Voltages
Input and Output Timing Ref. Voltages
Figure 8.
100
pF
10
ns
0 to VCC
0 to VCC
V
VCC/2
VCC/2
V
AC Testing Input Output Waveform
VCC
VCC/2
0V
AI09444
25/43
M29W008ET, M29W008EB
7 DC and AC characteristics
Figure 9.
AC Testing Load Circuit
0.8V
1N914
3.3kΩ
DEVICE
UNDER
TEST
OUT
CL
CL includes JIG capacitance
Table 8.
Device Capacitance
Symbol
CIN
Table 9.
Symbol
Parameter
Input Capacitance
COUT
Note:
Output Capacitance
Test Condition
Min
Max
Unit
VIN = 0V
6
pF
VOUT = 0V
12
pF
Sampled only, not 100% tested.
DC Characteristics
Parameter
ILI
Input Leakage Current
ILO
Output Leakage Current
ICC1
Supply Current (Read)
ICC2
Supply Current (Standby)
ICC3(1)
AI09445
Supply Current
(Program or Erase)
Test Condition
Min
Max
Unit
0V ≤ VIN ≤ VCC
±1
µA
0V ≤ VOUT ≤ VCC
±1
µA
E = VIL, G = VIH, f = 6MHz
10
mA
100
µA
20
mA
E = VCC ±0.2V
RP = VCC ±0.2V
Program,/ Erase Controller
active
VIL
Input Low Voltage
–0.5
0.8
V
VIH
Input High Voltage
0.7 VCC
VCC + 0.3
V
VOL
Output Low Voltage
0.45
V
VOH
Output High Voltage CMOS
VID
A9 Voltage (Electronic Signature)
IID
A9 Current (Electronic Signature)
VLKO(1)
Supply Voltage (Erase and Program
lock-out)
1. Sampled only, not 100% tested.
26/43
IOL = 1.8mA
IOH = –100µA
VCC –0.4V
11.5
A9 = VID
1.8
V
12.5
V
100
µA
2.3
V
M29W008ET, M29W008EB
7 DC and AC characteristics
Figure 10. Read Mode AC Waveforms
tAVAV
A0-A19
VALID
tAVQV
tAXQX
E
tELQV
tEHQX
tELQX
tEHQZ
G
tGLQX
tGHQX
tGLQV
tGHQZ
VALID
DQ0-DQ7
AI09446
Table 10.
Read AC Characteristics
M29W008E
Symbol
Alt
Parameter
Test Condition
Unit
70
90
tAVAV(1)
tRC
Address Valid to Next Address Valid
E = VIL,
G = VIL
Min
70
90
ns
tAVQV(1)
tACC
Address Valid to Output Valid
E = VIL,
G = VIL
Max
70
90
ns
tELQX(2)
tLZ
Chip Enable Low to Output Transition
G = VIL
Min
0
0
ns
tELQV(1)
tCE
Chip Enable Low to Output Valid
G = VIL
Max
70
90
ns
tGLQX(2)
tOLZ
Output Enable Low to Output Transition
E = VIL
Min
0
0
ns
tGLQV(1)
tOE
Output Enable Low to Output Valid
E = VIL
Max
30
35
ns
tEHQZ(2)
tHZ
Chip Enable High to Output Hi-Z
G = VIL
Max
25
30
ns
tGHQZ(2)
tDF
Output Enable High to Output Hi-Z
E = VIL
Max
25
30
ns
tOH
Chip Enable, Output Enable or Address
Transition to Output Transition
Min
0
0
ns
tEHQX
tGHQX
tAXQX
1. Address are latched on the falling edge of W, Data is latched on the rising edge of W.
2. Sampled only, not 100% tested.
27/43
M29W008ET, M29W008EB
7 DC and AC characteristics
Figure 11. Write AC Waveforms, W Controlled
tAVAV
A0-A19
VALID
tWLAX
tAVWL
tWHEH
E
tELWL
tWHGL
G
tGHWL
tWLWH
W
tWHWL
tDVWH
DQ0-DQ7
tWHDX
VALID
VCC
tVCHEL
RB
tWHRL
Table 11.
AI02192
Write AC Characteristics, W Controlled
M29W008E
Symbol
Alt
Parameter
Unit
70
90
tAVAV
tWC
Address Valid to Next Address Valid
Min
70
90
ns
tELWL
tCS
Chip Enable Low to Write Enable Low
Min
0
0
ns
tWLWH
tWP
Write Enable Low to Write Enable High
Min
45
50
ns
tDVWH
tDS
Input Valid to Write Enable High
Min
45
50
ns
tWHDX
tDH
Write Enable High to Input Transition
Min
0
0
ns
tWHEH
tCH
Write Enable High to Chip Enable High
Min
0
0
ns
tWHWL
tWPH
Write Enable High to Write Enable Low
Min
30
30
ns
tAVWL
tAS
Address Valid to Write Enable Low
Min
0
0
ns
tWLAX
tAH
Write Enable Low to Address Transition
Min
45
50
ns
Output Enable High to Write Enable Low
Min
0
0
ns
tGHWL
tWHGL
tOEH
Write Enable High to Output Enable Low
Min
0
0
ns
tWHRL(1)
tBUSY
Program/Erase Valid to RB Low
Max
30
35
ns
tVCHEL
tVCS
VCC High to Chip Enable Low
Min
50
50
µs
1. Sampled only, not 100% tested.
28/43
M29W008ET, M29W008EB
7 DC and AC characteristics
Figure 12. Write AC Waveforms, E Controlled
tAVAV
VALID
A0-A19
tELAX
tAVEL
tEHWH
W
tWLEL
tEHGL
G
tGHEL
tELEH
E
tEHEL
tDVEH
DQ0-DQ7
tEHDX
VALID
VCC
tVCHWL
RB
tEHRL
Note:
AI02193
Address are latched on the falling edge of E, Data is latched on the rising edge of E.
29/43
M29W008ET, M29W008EB
7 DC and AC characteristics
Table 12.
Write AC Characteristics, E Controlled
M29W008E
Symbol
Alt
Parameter
Unit
70
90
tAVAV
tWC
Address Valid to Next Address Valid
Min
70
90
ns
tWLEL
tWS
Write Enable Low to Chip Enable Low
Min
0
0
ns
tELEH
tCP
Chip Enable Low to Chip Enable High
Min
45
50
ns
tDVEH
tDS
Input Valid to Chip Enable High
Min
45
50
ns
tEHDX
tDH
Chip Enable High to Input Transition
Min
0
0
ns
tEHWH
tWH
Chip Enable High to Write Enable High
Min
0
0
ns
tEHEL
tCPH
Chip Enable High to Chip Enable Low
Min
30
30
ns
tAVEL
tAS
Address Valid to Chip Enable Low
Min
0
0
ns
tELAX
tAH
Chip Enable Low to Address Transition
Min
45
50
ns
Output Enable High Chip Enable Low
Min
0
0
ns
tGHEL
tEHGL
tOEH
Chip Enable High to Output Enable Low
Min
0
0
ns
tEHRL(1)
tBUSY
Program/Erase Valid to RB Low
Max
30
35
ns
tVCHWL
tVCS
VCC High to Write Enable Low
Min
50
50
µs
1. Sampled only, not 100% tested.
30/43
M29W008ET, M29W008EB
7 DC and AC characteristics
Figure 13. Reset/Block Temporary Unprotect AC Waveforms
W, E, G
tPHWL, tPHEL, tPHGL
RB
tRHWL, tRHEL, tRHGL
tPLPX
RP
tPHPHH
tPLYH
AI09447
Table 13.
Reset/Block Temporary Unprotect AC Characteristics
M29W008E
Symbol
Alt
tPHWL(1)
Parameter
Unit
70
90
tRH
RP High to Write Enable Low, Chip Enable Low,
Output Enable Low
Min
50
50
ns
tRB
RB High to Write Enable Low, Chip Enable Low,
Output Enable Low
Min
0
0
ns
tPLPX
tRP
RP Pulse Width
Min
500
500
ns
tPLYH(1)
tREADY
RP Low to Read Mode
Max
10
10
µs
tPHPHH(1)
tVIDR
RP Rise Time to VID
Min
500
500
ns
tPHEL
tPHGL(1)
tRHWL(1)
tRHEL(1)
tRHGL(1)
1. Sampled only, not 100% tested.
31/43
M29W008ET, M29W008EB
8 Package mechanical
8
Package mechanical
Figure 14. TSOP40 - 40 lead Plastic Thin Small Outline, 10 x 20mm, Package Outline
A2
1
N
e
E
B
N/2
D1
A
CP
D
DIE
C
A1
TSOP-a
Note:
α
L
Drawing is not to scale.
Table 14.
TSOP40 - 40 lead Plastic Thin Small Outline, 10 x 20mm, Package Mechanical Data
millimeters
inches
Symbol
Typ
Min
A
Typ
Min
1.200
Max
0
A1
0.050
0.150
0
0
A2
0.950
1.050
0
0
B
0.170
0.270
0
0
C
0.100
0.210
0
0
CP
0.100
0
D
19.800
20.200
1
1
D1
18.300
18.500
1
1
–
–
–
–
E
9.900
10.100
0
0
L
0.500
0.700
0
0
α
0
5
0
5
e
N
32/43
Max
0.500
40
0
40
M29W008ET, M29W008EB
9
9 Part numbering
Part numbering
Table 15.
Ordering Information Scheme
Example:
M29W008ET
70
N
1
E
Device Type
M29
Operating Voltage
W = 2.7 to 3.6V
Device Function
008E = 8 Mbit (1Mb x8), Boot Block
Array Matrix
T = Top Boot
B = Bottom Boot
Speed
70 = 70ns
90 = 90ns
Package
N = TSOP40: 10 x 20 mm
Temperature Range
1 = 0 to 70 °C
6 = –40 to 85 °C
Option
E = ECOPACK Package, Standard Packing
F = ECOPACK Package, Tape & Reel 24mm Packing
Devices are shipped from the factory with the memory content bits erased to ’1’.
For a list of available options (Speed, Package, etc.) or for further information on any aspect of
this device, please contact the ST Sales Office nearest to you.
33/43
M29W008ET, M29W008EB
9 Part numbering
Appendix A Block address table
Table 16.
#
Size
(Kbytes)
Address Range
(x8)
18
16
FC000h-FFFFFh
17
8
FA000h-FBFFFh
16
8
F8000h-F9FFFh
15
32
F0000h-F7FFFh
14
64
E0000h-EFFFFh
13
64
D0000h-DFFFFh
12
64
C0000h-CFFFFh
11
64
B0000h-BFFFFh
10
64
A0000h-AFFFFh
9
64
90000h-9FFFFh
8
64
80000h-8FFFFh
7
64
70000h-7FFFFh
6
64
60000h-6FFFFh
5
64
50000h-5FFFFh
4
64
40000h-4FFFFh
3
64
30000h-3FFFFh
2
64
20000h-2FFFFh
1
64
10000h-1FFFFh
0
64
00000h-0FFFFh
Table 17.
34/43
Top Boot Block Addresses, M29W008ET
Bottom Boot Block Addresses, M29W008EB
#
Size
(Kbytes)
Address Range
(x8)
18
64
F0000h-FFFFFh
17
64
E0000h-EFFFFh
16
64
D0000h-DFFFFh
15
64
C0000h-CFFFFh
14
64
B0000h-BFFFFh
13
64
A0000h-AFFFFh
12
64
90000h-9FFFFh
11
64
80000h-8FFFFh
10
64
70000h-7FFFFh
M29W008ET, M29W008EB
9 Part numbering
9
64
60000h-6FFFFh
8
64
50000h-5FFFFh
7
64
40000h-4FFFFh
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
35/43
9 Part numbering
M29W008ET, M29W008EB
Appendix B Block protection
Block protection can be used to prevent any operation from modifying the data stored in the
Flash. Each Block can be protected individually. Once protected, Program and Erase
operations on the block fail to change the data.
There are three techniques that can be used to control Block Protection, these are the
Programmer technique, the In-System technique and Temporary Unprotection. Temporary
Unprotection is controlled by the Reset/Block Temporary Unprotection pin, RP; this is described
in the Signal Descriptions section.
Unlike the Command Interface of the Program/Erase Controller, the techniques for protecting
and unprotecting blocks change between different Flash memory suppliers. For example, the
techniques for AMD parts will not work on STMicroelectronics parts. Care should be taken
when changing drivers for one part to work on another.
9.1
Programmer technique
The Programmer technique uses high (VID) voltage levels on some of the bus pins. These
cannot be achieved using a standard microprocessor bus, therefore the technique is
recommended only for use in Programming Equipment.
To protect a block follow the flowchart in Figure 15: Programmer Equipment Block Protect
Flowchart. To unprotect the whole chip it is necessary to protect all of the blocks first, then all
blocks can be unprotected at the same time. To unprotect the chip follow Figure 16:
Programmer Equipment Chip Unprotect Flowchart. Table 18: Programmer Technique Bus
Operations, gives a summary of each operation.
The timing on these flowcharts is critical. Care should be taken to ensure that, where a pause is
specified, it is followed as closely as possible. Do not abort the procedure before reaching the
end. Chip Unprotect can take several seconds and a user message should be provided to show
that the operation is progressing.
9.2
In-System technique
The In-System technique requires a high voltage level on the Reset/Blocks Temporary
Unprotect pin, RP. This can be achieved without violating the maximum ratings of the
components on the microprocessor bus, therefore this technique is suitable for use after the
Flash has been fitted to the system.
To protect a block follow the flowchart in Figure 17: In-System Equipment Block Protect
Flowchart. To unprotect the whole chip it is necessary to protect all of the blocks first, then all
the blocks can be unprotected at the same time. To unprotect the chip follow Figure 18: InSystem Equipment Chip Unprotect Flowchart.
The timing on these flowcharts is critical. Care should be taken to ensure that, where a pause is
specified, it is followed as closely as possible. Do not allow the microprocessor to service
interrupts that will upset the timing and do not abort the procedure before reaching the end.
Chip Unprotect can take several seconds and a user message should be provided to show that
the operation is progressing.
36/43
M29W008ET, M29W008EB
Table 18.
9 Part numbering
Programmer Technique Bus Operations
Operation
E
G
W
Block Protect
VIL
VID
VIL Pulse
Chip Unprotect
VID
VID
VIL Pulse
Block Protection
Verify
VIL
VIL
VIH
Block Unprotection
Verify
VIL
Address Inputs
A0-A18
A9 = VID, A13-A19= Block Address
Others = X
A9 = VID, A13 = VIH, A16 = VIH
Others = X
A0 = VIL, A1 = VIH, A6 = VIL,
A9 = VID, A13-A19= Block Address
Others = X
VIL
VIH
A0 = VIL, A1 = VIH, A6 = VIH,
A9 = VID, A13-A19= Block Address
Others = X
Data Inputs/Outputs
DQ7-DQ0
X
X
Pass = 01h
Retry = 00h
Retry = 01h
Pass = 00h
37/43
M29W008ET, M29W008EB
9 Part numbering
Figure 15. Programmer Equipment Block Protect Flowchart
START
Set-up
ADDRESS = BLOCK ADDRESS
W = VIH
n=0
G, A9 = VID,
E = VIL
Protect
Wait 4µs
W = VIL
Wait 100µs
W = VIH
E, G = VIH,
A0, A6 = VIL,
A1 = VIH
E = VIL
Verify
Wait 4µs
G = VIL
Wait 60ns
Read DATA
DATA
NO
=
01h
YES
A9 = VIH
E, G = VIH
++n
= 25
NO
End
YES
PASS
A9 = VIH
E, G = VIH
FAIL
38/43
AI09448
M29W008ET, M29W008EB
9 Part numbering
Figure 16. Programmer Equipment Chip Unprotect Flowchart
START
Set-up
PROTECT ALL BLOCKS
n=0
CURRENT BLOCK = 0
A6, A13, A16 = VIH(1)
E, G, A9 = VID
Unprotect
Wait 4µs
W = VIL
Wait 10ms
W = VIH
E, G = VIH
ADDRESS = CURRENT BLOCK ADDRESS
A0 = VIL, A1, A6 = VIH
E = VIL
Wait 4µs
G = VIL
INCREMENT
CURRENT BLOCK
Verify
Wait 60ns
Read DATA
NO
End
NO
++n
= 1000
DATA
=
00h
YES
LAST
BLOCK
YES
YES
A9 = VIH
E, G = VIH
A9 = VIH
E, G = VIH
FAIL
PASS
NO
AI09449
39/43
M29W008ET, M29W008EB
9 Part numbering
Figure 17. In-System Equipment Block Protect Flowchart
Set-up
START
n=0
RP = VID
Protect
WRITE 60h
ADDRESS = BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIL
WRITE 60h
ADDRESS = BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIL
Wait 100µs
Verify
WRITE 40h
ADDRESS = BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIL
Wait 4µs
READ DATA
ADDRESS = BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIL
DATA
NO
=
01h
YES
End
RP = VIH
ISSUE READ/RESET
COMMAND
PASS
++n
= 25
NO
YES
RP = VIH
ISSUE READ/RESET
COMMAND
FAIL
AI09450
40/43
M29W008ET, M29W008EB
9 Part numbering
Figure 18. In-System Equipment Chip Unprotect Flowchart
START
Set-up
PROTECT ALL BLOCKS
n=0
CURRENT BLOCK = 0
RP = VID
WRITE 60h
ANY ADDRESS WITH
A0 = VIL, A1 = VIH, A6 = VIH
Unprotect
WRITE 60h
ANY ADDRESS WITH
A0 = VIL, A1 = VIH, A6 = VIH
Wait 10ms
Verify
WRITE 40h
ADDRESS = CURRENT BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIH
Wait 4µs
READ DATA
ADDRESS = CURRENT BLOCK ADDRESS
A0 = VIL, A1 = VIH, A6 = VIH
NO
End
NO
++n
= 1000
YES
DATA
=
00h
INCREMENT
CURRENT BLOCK
YES
LAST
BLOCK
NO
YES
RP = VIH
RP = VIH
ISSUE READ/RESET
COMMAND
ISSUE READ/RESET
COMMAND
FAIL
PASS
AI09451
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M29W008ET, M29W008EB
10 Revision history
10
Revision history
Table 19.
Document Revision History
Date
Version
21-Jun-2005
0.1
42/43
Revision Details
First Issue.
M29W008ET, M29W008EB
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences
of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted
by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject
to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not
authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics.
The ST logo is a registered trademark of STMicroelectronics.
All other names are the property of their respective owners
© 2005 STMicroelectronics - All rights reserved
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43/43