AMD AM29LV008B-90RECB 8 megabit (1,048,576 x 8-bit) cmos 3.0 volt-only, sectored flash memory Datasheet

PRELIMINARY
Am29LV008T/Am29LV008B
8 Megabit (1,048,576 x 8-Bit) CMOS 3.0 Volt-only,
Sectored Flash Memory
■ Single power supply operation
— Extended voltage range: 2.7 to 3.6 volt read and
write operations for battery-powered
applications
— Standard voltage range: 3.0 to 3.6 volt read and
write operations and for compatibility with high
performance 3.3 volt microprocessors
■ High performance
— Extended voltage range: access times as fast as
100 ns
— Standard voltage range: access times as fast as
90 ns
■ Ultra low power consumption
— Automatic Sleep Mode: 200 nA typical
— Standby mode: 200 nA typical
— Read mode: 2 mA/MHz typical
— Program/erase mode: 20 mA typical
■ Flexible sector architecture
— One 16 Kbyte, two 8 Kbyte, one 32 Kbyte, and
fifteen 64 Kbyte sectors
— Supports control code and data storage on a
single device
— Sector Protection features:
A hardware method of locking a sector to
prevent any program or erase operations within
that sector
Temporary Sector Unprotect feature allows code
changes in previously locked sectors
■ Top or bottom boot block configurations
available
■ Embedded Algorithms
— Embedded Erase algorithms automatically
preprogram and erase the entire chip or any
combination of designated sectors
— Embedded Program algorithms automatically
write and verify bytes or words at specified
addresses
■ Minimum 100,000 write cycle guarantee per
sector
■ Package option
— 40-pin TSOP
■ Compatibility with JEDEC standards
— Pinout and software compatible with singlepower supply Flash
— Superior inadvertent write protection
■ Data Polling and toggle bits
— Provides a software method of detecting
program or erase operation completion
■ Ready/Busy pin
— Provides a hardware method of detecting
program or erase cycle completion
■ Erase suspend/resume feature
— Provides the ability to suspend the erase
operation in any sector, read data from or
program data to any other sector, then return to
the original sector and complete the initial erase
operation
■ Hardware reset pin (RESET)
— Hardware method to reset the device to the read
mode
GENERAL DESCRIPTION
The Am29LV008 is an 8 Mbit, 3.0 Volt-only Flash memory organized as 512 Kbytes of 8 bits each. For flexible
erase and program capability, the 512 Kbits of data is
divided into 19 sectors of one 16 Kbyte, two 8 Kbyte,
one 32 Kbyte, and fifteen 64 Kbytes. The data appears
on DQ0–DQ7. The Am29LV008 is offered in a 40-pin
TSOP package. This device is designed to be pro-
grammed in-system with the standard system 3.0 volt
VCC supply. The device can also be reprogrammed in
standard EPROM programmers.
The Am29LV008 provides two levels of performance.
The first level offers access times as fast as 100 ns with
a VCC range as low as 2.7 volts, which is optimal for
battery powered applications. The second level offers a
This document contains information on a product under development at Advanced Micro Devices. The information
is intended to help you evaluate this product. AMD reserves the right to change or discontinue work on this proposed
product without notice.
Publication# 20511 Rev: C Amendment/+1
Issue Date: May 1997
3.0 V-only Flash
DISTINCTIVE CHARACTERISTICS
P R E L I M I N A R Y
90 ns access time, optimizing performance in systems
where the power supply is in the regulated range of 3.0
to 3.6 volts. To eliminate bus contention, the device has
separate chip enable (CE), write enable (WE), and
output enable (OE) controls.
The Am29LV008 is entirely command set-compatible
with the JEDEC single-power-supply Flash standard.
Commands are written to the command register using
standard microprocessor write timings. Register contents serve as input to an internal state-machine that
controls the erase and programming circuitry. Write cycles also internally latch addresses and data needed
for the programming and erase operations. Reading
data out of the device is similar to reading from other
Flash or EPROM devices.
The Am29LV008 is programmed by executing the program command sequence. This invokes the Embedded
Program Algorithm, which is an internal algorithm that
automatically times the program pulse widths and verifies proper cell margin. The device is erased by executing the erase command sequence. This invokes the
Embedded Erase Algorithm, which is an internal algorithm that automatically preprograms the array, if it is
not already programmed, before executing the erase
operation. During erase, the device automatically times
the erase pulse widths and verifies proper cell margin.
This device also features a sector erase architecture.
This allows for sectors of memory to be erased and reprogrammed without affecting the data contents of
other sectors. A sector is typically erased and verified
within 1.0 second. The Am29LV008 is fully erased
when shipped from the factory.
2
The Am29LV008 device also features hardware sector
protection, implemented via external programming
equipment, which disables both program and erase operations in any combination of the memory sectors.
The Erase Suspend feature enables the user to pause
the erase operation, for any period of time, to read data
from or program data to a sector that was not being
erased. Thus, true background erase can be achieved.
The device features 3.0 volt, single-power-supply operation for both read and write functions. Internally generated and regulated voltages are provided for the
program and erase operations. A low VCC detector automatically inhibits write operations during power transitions. The end of program or erase is detected by the
RY/BY pin. Data Polling of DQ7, or by the Toggle Bit
(DQ6). Once the end of a program or erase cycle has
been completed, the device automatically resets to the
read mode.
The Am29LV008 also has a hardware RESET pin.
When this pin is driven low, execution of any Embedded Program or Erase Algorithm will be terminated.
The internal state machine is then be reset into the
read mode. Resetting the device will enable the system’s microprocessor to read the boot-up firmware
from the Flash memory.
AMD’s Flash technology combines years of Flash
memory manufacturing experience to produce the
highest levels of quality, reliability and cost effectiveness. The Am29LV008 memory electrically erases
all bits within a sector simultaneously via FowlerNordheim tunneling. The bytes are programmed one
byte at a time using the EPROM programming mechanism of hot electron injection.
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
PRODUCT SELECTOR GUIDE
Am29LV008T/Am29LV008B
Family Part Number
VCC = 3.0–3.6 V
3.0 V-only Flash
Ordering Part Number:
-90R
VCC = 2.7–3.6 V
-100
-120
-150
Max access time (ns)
90
100
120
150
CE access time (ns)
90
100
120
150
OE access time (ns)
40
40
50
55
BLOCK DIAGRAM
RY/BY
Sector
Switches
DQ0–DQ7
Erase Voltage
Generator
Input/Output
Buffers
VCC
VSS
RESET
WE
BYTE
State
Control
Command
Register
PGM Voltage
Generator
Chip Enable
Output Enable
Logic
CE
OE
VCC Detector
A0–A19
Timer
Address Latch
STB
STB
Data Latch
Y-Decoder
Y-Gating
X-Decoder
Cell Matrix
20511C-1
Am29LV008T/Am29LV008B
3
P R E L I M I N A R Y
CONNECTION DIAGRAMS
A16
A15
A14
A13
A12
A11
A9
A8
WE
RESET
NC
RY/BY
A18
A7
A6
A5
A4
A3
A2
A1
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A17
VSS
NC
A19
A10
DQ7
DQ6
DQ5
DQ4
VCC
VCC
NC
DQ3
DQ2
DQ1
DQ0
OE
VSS
CE
A0
Standard 40-Pin TSOP
A17
VSS
NC
A19
A10
DQ7
DQ6
DQ5
DQ4
VCC
VCC
NC
DQ3
DQ2
DQ1
DQ0
CE
VSS
CE
A0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
40
39
38
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
22
21
A16
A15
A14
A13
A12
A11
A9
A8
WE
RESET
NC
RY/BY
A18
A7
A6
A5
A4
A3
A2
A1
Reverse 40-Pin TSOP
20511C-2
4
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
PIN CONFIGURATION
LOGIC SYMBOL
A0–A19
= 20 addresses
DQ0–DQ7
= 8 data inputs/outputs
CE
= Chip enable
OE
= Output enable
WE
= Write enable
CE (E)
RESET
= Hardware reset pin, active low
OE (G)
RY/BY
= Ready/Busy output
WE (W)
VCC
= Standard voltage range
(3.0 V to 3.6 V) for -90R
RESET
20
3.0 V-only Flash
A0–A19
8
DQ0–DQ7
Extended voltage range
(2.7 to 3.6 V) for -100, -120, -150
VSS
= Device ground
NC
= Pin not connected internally
Am29LV008T/Am29LV008B
RY/BY
20511C-3
5
P R E L I M I N A R Y
ORDERING INFORMATION
Standard Products
AMD standard products are available in several packages and operating ranges. The order number (Valid Combination) is formed by a combination of the elements below.
Am29LV008
T
-90R
E
C
OPTIONAL PROCESSING
Blank = Standard Processing
B = Burn-in
TEMPERATURE RANGE
C = Commercial (0°C to +70°C)
I = Industrial (–40°C to +85°C)
E = Extended (–55°C to +125°C)
PACKAGE TYPE
E = 40-Pin Thin Small Outline Package (TSOP)
Standard Pinout (TS 040)
F = 40-Pin Thin Small Outline Package (TSOP)
Reverse Pinout (TSR040)
SPEED OPTION
-xxx = 2.7 to 3.6 V VCC
-xxR = 3.0 to 3.6 V VCC
See Product Selector Guide and Valid Combinations
BOOT CODE SECTOR ARCHITECTURE
T = Top Sector
B = Bottom Sector
DEVICE NUMBER/DESCRIPTION
Am29LV008
8 Megabit (1 M x 8-Bit) CMOS Flash Memory
3.0 Volt-only Program and Erase
Valid Combinations
Valid Combinations
Am29LV008T-90R,
Am29LV008B-90R
EC, EI, FC, FI
VCC = 3.0–3.6 V
Valid Combinations list configurations planned to be supported in volume for this device. Consult the local AMD sales
office to confirm availability of specific valid combinations and
to check on newly released combinations.
Am29LV008T-100,
Am29LV008B-100
Am29LV008T-120,
Am29LV008B-120
EC, EI, EE, EEB,
FC, FI, FE, FEB
Am29LV008T-150,
Am29LV008B-150
6
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
Table 1.
Am29LV008 User Bus Operations
OE
WE
A0
A1
A6
A9
DQ0–DQ7
RESET
Autoselect, Manufacturer Code
(Note 1)
L
L
H
L
L
L
VID
Code
H
Autoselect, Device Code (Note 1)
L
L
H
H
L
L
VID
Code
H
Read
L
L
H
A0
A1
A6
A9
RD
H
Standby
H
X
X
X
X
X
X
HIGH Z
H
Output Disable
L
H
H
X
X
X
X
HIGH Z
H
Write
L
H
L
A0
A1
A6
A9
PD (Note 2)
H
Enable Sector Protect (Note 3)
L
VID
Pulse/H
L
H
L
VID
Code
H
Verify Sector Protect (Note 4)
L
L
H
L
H
L
VID
Code
H
Temporary Sector Unprotect
X
X
X
X
X
X
X
X
VID
Reset
X
X
X
X
X
X
X
HIGH Z
L
3.0 V-only Flash
CE
Operation
Legend:
L = VIL, H = VIH, VID = 12.0 V ± 5%, X = Don’t care. See “DC Characteristics” on page 26 for voltage levels.
PD = program data, RD = read data. Refer to Table 3 on page 10 for more information.
Notes:
1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 5 on page 13.
2. Refer to Table 5 for valid PD during a write operation.
3. Set VCC = 3.0 volts ± 10%.
4. Refer to “Sector Protection” on page 12.
Am29LV008T/Am29LV008B
7
P R E L I M I N A R Y
USER BUS OPERATIONS
Read Mode
The Am29LV008 has three control functions which
must be satisfied in order to obtain data at the outputs:
■ CE is the power control and should be used for device selection (CE = VIL)
■ OE is the output control and should be used to gate
data to the output pins if the device is selected
(OE = VIL)
■ WE remains at VIH
Address access time (TACC) is equal to the delay from
stable addresses to valid output data. The chip enable
access time (TCE) is the delay from stable addresses
and stable CE to valid data at the output pins. The output enable access time (TOE) is the delay from the falling edge of OE to valid data at the output pins
(assuming the addresses have been stable at least
TACC – TOE time).
Standby Mode
The Am29LV008 is designed to accommodate low
standby power consumption by applying the following
voltages to the CE and RESET pins: ICC3 for CMOS
compatible I/Os (current consumption <5 µA max.) is
enabled when a CMOS logic level ‘1’ (VCC ± 0.3 V) is
applied to the CE control pin with RESET = VCC ± 0.3
V. While in the ICC3 standby mode, the data I/O pins remain in the high impedance state independent of the
voltage level applied to the OE input. See the DC Characteristics section for more details on Standby Modes.
8
Deselecting CE (CE and RESET = VCC ± 0.3 V) puts
the device into the ICC3 standby mode. If the device is
deselected during an Embedded Algorithm operation,
it continues to draw active power (ICC2) prior to entering
the standby mode, until the operation is complete.
When the device is again selected (CE = VIL), active
operations occur in accordance with the AC timing
specifications.
Automatic Sleep Mode
Advanced power management features such as the
automatic sleep mode minimize Flash device energy
c o n s u m p t i o n . T h i s i s ex t r e m e l y i m p o r t a n t i n
battery-powered applications. The Am29LV008 automatically enables the low-power, automatic sleep
mode when addresses remain stable for 200 ns. Automatic sleep mode is independent of the CE, WE, and
OE control signals. Typical sleep mode current draw is
200 nA (for CMOS-compatible operation). Standard
address access timings provide new data when
addresses are changed. While in sleep mode, output
data is latched and always available to the system.
Output Disable
If the OE input is at a logic high level (VIH), output from
the device is disabled. This will cause the output pins to
be in a high impedance state.
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
Autoselect
To activate this mode, the programming equipment
must force VID (12.0 V ± 5%) on address pin A9. Two
identifier bytes may then be sequenced from the device
outputs by toggling address A0 from VIL to VIH. All addresses are don’t cares except A0, A1, and A6 see
Table 2.
Byte 0 (A0 = VIL) represents the manufacturer’s code
and byte 1 (A0 = VIH) the device identifier code. For the
Am29LV008 these two bytes are given in Table 2. All
identifiers for manufacturer and device will exhibit odd
parity with DQ7 defined as the parity bit. In order to
read the proper device codes when executing Autoselect, A1 must be VIL (see Table 2). The device code is
3EH (for top boot block) or 37H (for bottom boot block).
In order to determine which sectors are write protected,
A1 must be at VIH while running through the sector addresses; if the selected sector is protected, a logical ‘1’
will be output on DQ0 (DQ0 = 1).
The manufacturer and device codes may also be read
via the command register, for instances when the
Table 2.
Autoselect/Sector Protection Codes
Type
A13–A19
A6
A1
A0
Code
(HEX)
DQ
7
DQ
6
DQ
5
DQ
4
DQ
3
DQ
2
DQ
1
DQ
0
Manufacturer Code: AMD
X
L
L
L
01H
0
0
0
0
0
0
0
1
29LV008 Device
(Top Boot Block)
X
L
L
H
3EH
0
0
1
1
1
1
1
0
29LV008 Device
(Bottom Boot Block)
X
L
L
H
37H
0
0
1
1
0
1
1
1
Set Sector
Addresses
L
H
L
01H*
0
0
0
0
0
0
0
1
Sector Protection
X = Don’t care.
* Outputs 01H at protected sector addresses.
Am29LV008T/Am29LV008B
9
3.0 V-only Flash
The Autoselect mode allows the reading out of a binary
code from the device and will identify its manufacturer
and type. The intent is to allow programming equipment
to automatically match the device to be programmed
with its corresponding programming algorithm. The Autoselect command may also be used to check the status of write-protected sectors (see Table 2). This mode
is functional over the entire temperature range of the
device.
Am29LV008 is erased or programmed in a system without access to high voltage on the A9 pin. The command
sequence is illustrated in Table 5 on page 13.
P R E L I M I N A R Y
Table 3.
Sector Address Tables (Am29LV008T)
A19
A18
A17
A16
A15
A14
A13
Sector Size
Address Range
SA0
0
0
0
0
X
X
X
64 Kbytes
00000h-0FFFFh
SA1
0
0
0
1
X
X
X
64 Kbytes
10000h-1FFFFh
SA2
0
0
1
0
X
X
X
64 Kbytes
20000h-2FFFFh
SA3
0
0
1
1
X
X
X
64 Kbytes
30000h-3FFFFh
SA4
0
1
0
0
X
X
X
64 Kbytes
40000h-4FFFFh
SA5
0
1
0
1
X
X
X
64 Kbytes
50000h-5FFFFh
SA6
0
1
1
0
X
X
X
64 Kbytes
60000h-6FFFFh
SA7
0
1
1
1
X
X
X
64 Kbytes
70000h-7FFFFh
SA8
1
0
0
0
X
X
X
64 Kbytes
80000h-8FFFFh
SA9
1
0
0
1
X
X
X
64 Kbytes
90000h-9FFFFh
SA10
1
0
1
0
X
X
X
64 Kbytes
A0000h-AFFFFh
SA11
1
0
1
1
X
X
X
64 Kbytes
B0000h-BFFFFh
SA12
1
1
0
0
X
X
X
64 Kbytes
C0000h-CFFFFh
SA13
1
1
0
1
X
X
X
64 Kbytes
D0000h-DFFFFh
SA14
1
1
1
0
X
X
X
64 Kbytes
E0000h-EFFFFh
SA15
1
1
1
1
0
X
X
32 Kbytes
F0000h-F7FFFh
SA16
1
1
1
1
1
0
0
8 Kbytes
F8000h-F9FFFh
SA17
1
1
1
1
1
0
1
8 Kbytes
FA000h-FBFFFh
SA18
1
1
1
1
1
1
X
16 Kbytes
FC000h-FFFFFh
10
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
Table 4.
Sector Address Tables (Am29LV008B)
A18
A17
A16
A15
A14
A13
Sector Size
Address Range
SA0
0
0
0
0
0
0
X
16 Kbytes
00000h-03FFFh
SA1
0
0
0
0
0
1
0
8 Kbytes
04000h-05FFFh
SA2
0
0
0
0
0
1
1
8 Kbytes
06000h-07FFFh
SA3
0
0
0
0
1
X
X
32 Kbytes
08000h-0FFFFh
SA4
0
0
0
1
X
X
X
64 Kbytes
10000h-1FFFFh
SA5
0
0
1
0
X
X
X
64 Kbytes
20000h-2FFFFh
SA6
0
0
1
1
X
X
X
64 Kbytes
30000h-3FFFFh
SA7
0
1
0
0
X
X
X
64 Kbytes
40000h-4FFFFh
SA8
0
1
0
1
X
X
X
64 Kbytes
50000h-5FFFFh
SA9
0
1
1
0
X
X
X
64 Kbytes
60000h-6FFFFh
SA10
0
1
1
1
X
X
X
64 Kbytes
70000h-7FFFFh
SA11
1
0
0
0
X
X
X
64 Kbytes
80000h-8FFFFh
SA12
1
0
0
1
X
X
X
64 Kbytes
90000h-9FFFFh
SA13
1
0
1
0
X
X
X
64 Kbytes
A0000h-AFFFFh
SA14
1
0
1
1
X
X
X
64 Kbytes
B0000h-BFFFFh
SA15
1
1
0
0
X
X
X
64 Kbytes
C0000h-CFFFFh
SA16
1
1
0
1
X
X
X
64 Kbytes
D0000h-DFFFFh
SA17
1
1
1
0
X
X
X
64 Kbytes
E0000h-EFFFFh
SA18
1
1
1
1
X
X
X
64 Kbytes
F0000h-FFFFFh
Am29LV008T/Am29LV008B
3.0 V-only Flash
A19
11
P R E L I M I N A R Y
Write
Device erasure and programming are accomplished
via the command register. The command register is
written by bringing WE to VIL, while CE is at VIL and OE
is at VIH. Addresses are latched on the falling edge of
CE or WE, whichever occurs later, while data is latched
on the rising edge of the CE or WE pulse, whichever
occurs first. Standard microprocessor write timings are
used.
Refer to AC Write Characteristics and the Erase/
Programming Waveforms for specific timing parameters.
Sector Protection
Sectors of the Am29LV008 may be hardware protected
at the user’s factory with external programming equipment. The protection circuitry will disable both program
and erase functions for the protected sectors, making
the protected sectors read-only. Requests to program
or erase a protected sector will be ignored by the device. If the user attempts to write to a protected sector,
DATA Polling will be activated for about 1 µs; the device
will then return to read mode, with data from the protected sector unchanged. If the user attempts to erase
a protected sector, Toggle Bit will be activated for about
50 µs; the device will then return to read mode, without
having erased the protected sector.
It is possible to determine if a sector is protected in the
system by writing an Autoselect command. Performing
a read operation at the address location XX02H, where
the higher order address A18–A12 represents the sector address, will produce a logical ‘1’ at DQ0 for a protected sector.
Temporary Sector Unprotect
The sectors of the Am29LV008 may be temporarily unprotected by raising the RESET pin to 12.0 volts (VID).
During this mode, formerly protected sectors can be
programmed or erased with standard command sequences by selecting the appropriate byte or sector addresses. Once the RESET pin goes to V IH , all the
previously protected sectors will be protected again.
Command Definitions
Device operations are selected by writing specific address and data sequences into the command register.
Writing incorrect address and data values or writ-
12
ing them in the improper sequence will reset the
device to the read mode. Table 5 on page 13 defines
the valid register command sequences. Note that the
Erase Suspend (B0H) and Erase Resume (30H) commands are valid only while the Sector Erase operation
is in progress.
Read/Reset Command
The device will automatically power up in the read/
reset state. In this case, a command sequence is
not required to read data. Standard microprocessor cycles will retrieve array data. This default
value ensures that no spurious alteration of the
memory content occurs during the power transition. Refer to the AC Characteristics section for the
specific timing parameters.
The read or reset operation is initiated by writing the
read/reset command sequence into the command register. Microprocessor read cycles retrieve array data
from the memory. The device remains enabled for
reads until the command register contents are altered.
Autoselect Command
Flash memories are intended for use in applications
where the local CPU alters memory contents. As such,
manufacturer and device codes must be accessible
while the device resides in the target system. The
Am29LV008 contains an autoselect command operation that provides device information and sector protection status to the system. The operation is initiated by
writing the autoselect command sequence into the
command register. Following the command write, a
read cycle from address XX00H retrieves the manufacturer code of 01H. A read cycle from address XX01H
returns the device code 3EH (for top boot device) or
37H (for bottom boot device); see Table 2 on page 9.
All manufacturer and device codes will exhibit odd parity with the MSB of the lower byte (DQ7) defined as the
parity bit. Scanning the sector addresses (A13, A14,
A15, A16, A17, A18, and A19) while (A6, A1, A0) = (0,
1, 0) will produce a logical ‘1’ code at device output
DQ0 for a write protected sector (See Table 2).
To terminate the Autoselect operation, it is necessary to write the read/reset command sequence
into the register.
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
Table 5.
Bus
First Bus
Write
Write Cycle
Cycles
Req’d Addr Data
Second Bus
Read/Write
Cycle
Third Bus
Write Cycle
Fourth Bus
Read/Write
Cycle
Fifth Bus
Write Cycle
Sixth Bus
Write Cycle
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Addr
Data
Reset/Read
1
XXX
F0
RA
RD
Autoselect
Manufacturer ID
3
555
AA
2AA
55
555
90
X00
01
Autoselect
Device ID
(Top Boot Block)
3
555
AA
2AA
55
555
90
X01
3E
Autoselect
Device ID
(Bottom Boot Block)
3
555
AA
2AA
55
555
90
X01
37
Autoselect
Sector Protect Verify
(Note 3)
3
555
AA
2AA
55
555
90
SA
X02
00
01
Byte Program
4
555
AA
2AA
55
555
A0
PA
PD
Chip Erase
6
555
AA
2AA
55
555
80
555
AA
2AA
55
555
10
Sector Erase
6
555
AA
2AA
55
555
80
555
AA
2AA
55
SA
30
Erase Suspend
(Note 4)
1
XXX
B0
Erase Resume
(Note 5)
1
XXX
30
Legend:
RA = Address of the memory location to be read.
RD = Data read from location RA during read operation.
PA = Address of the memory location to be programmed. Addresses are latched on the falling edge of the WE or CE pulse.
PD = Data to be programmed at location PA. Data is latched on the rising edge of WE or CE pulse.
SA = Address of the sector to be erased or verified. Address bits A19–A13 uniquely select any sector.
Notes:
1. All values are in hexadecimal.
2. See Table 1 for description of bus operations.
3. The data is 00h for an unprotected sector and 01h for a protected sector. The complete bus address is composed of the sector
address on A19–A13 and 02h on A7–A0.
4. Read and program functions in non-erasing sectors are allowed in the Erase Suspend mode. The Erase Suspend command
is valid only during a sector erase operation.
5. The Erase Resume command is valid only during the Erase Suspend mode.
6. Unless otherwise noted, address bits A19–A11 = X = don’t care.
Byte Programming
The device is programmed on a byte-by-byte basis.
Programming is a four-bus-cycle operation. There
are two “unlock” write cycles. These are followed by
the program command and address/data write cycles. Addresses are latched on the falling edge of
CE or WE, whichever occurs later, while the data is
latched on the rising edge of CE or WE, whichever
occurs first. The rising edge of CE or WE, whichever
occurs first, initiates programming using the Em-
bedded Program Algorithm. Upon executing the
write command, the system is not required to provide further controls or timing. The device will automatically provide adequate internally generated
program pulses and verify the programmed cell
margin.
The status of the Embedded Program Algorithm operation can be determined three ways:
■ DATA Polling of DQ7
Am29LV008T/Am29LV008B
13
3.0 V-only Flash
Command
Sequence
Read/Reset
(Note 2)
Am29LV008 Command Definitions
P R E L I M I N A R Y
■ Checking the status of the toggle bit DQ6
■ Checking the status of the RY/BY pin
Any commands written to the chip during the Embedded Program Algorithm will be ignored. If a
hardware reset occurs during a programming operation, the data at that location will be corrupted.
Programming is allowed in any sequence and
across sector boundaries. Beware that a data ‘0’
cannot be programmed back to a ‘1’. Attempting to
do so will cause the device to exceed programming
time limits (DQ5 = 1) or result in an apparent success according to the data polling algorithm. However, reading the device after executing the Read/
Reset operation will show that the data is still ‘0’.
Only erase operations can convert ‘0’s to ‘1’s.
Figure 4 illustrates the Embedded Program Algorithm,
using typical command strings and bus operations.
Chip Erase
Chip erase is a six bus cycle operation. There are two
“unlock” write cycles, followed by writing the erase “set
up” command. Two more “unlock” write cycles are followed by the chip erase command.
Chip erase does not require the user to preprogram the
device to all ‘0’s prior to erase. Upon executing the Embedded Erase Algorithm command sequence, the device automatically programs and verifies the entire
memory to an all zero data pattern prior to electrical
erase. The system is not required to provide any controls or timings during these operations.
The Embedded Erase Algorithm erase begins on the
rising edge of the last WE or CE (whichever occurs
first) pulse in the command sequence. The status of the
Embedded Erase Algorithm operation can be determined three ways:
■ DATA Polling of DQ7
■ Checking the status of the toggle bit DQ6
■ Checking the status of the RY/BY pin
Figure 5 illustrates the Embedded Erase Algorithm,
using a typical command sequence and bus operations.
Sector erase does not require the user to program the
device prior to erase. The device automatically preprograms all memory locations, within sectors to be
erased, prior to electrical erase. When erasing a sector
or sectors, the remaining unselected sectors or the
write protected sectors are unaffected. The system is
not required to provide any controls or timings during
sector erase operations. The Erase Suspend and
Erase Resume commands may be written as often as
required during a sector erase operation.
Automatic sector erase operations begin on the rising
edge of the WE (or CE) pulse of the last sector erase
command issued, and once the 80 µs time-out window
has expired. The status of the sector erase operation
can be determined three ways:
■ DATA Polling of DQ7
■ Checking the status of the toggle bit DQ6
■ Checking the status of the RY/BY pin
Sector Erase
Sector erase is a six bus cycle operation. There are two
“unlock” writes. These are followed by writing the erase
“set up” command. Two more “unlock” writes are followed by the Sector Erase command (30H). The sector
address (any address location within the desired sector) is latched on the falling edge of WE or CE (whichever occurs last) while the command (30H) is latched
on the rising edge of WE or CE (whichever occurs first).
Multiple sectors can be specified for erase by writing
the six bus cycle operation as described above and
14
then following it by additional writes of the Sector Erase
command to addresses of other sectors to be erased.
The time between Sector Erase command writes must
be less than 80 µs, otherwise that command will not be
accepted. It is recommended that processor interrupts
be disabled during this time to guarantee this condition.
The interrupts can be re-enabled after the last Sector
Erase command is written. A time-out of 80 µs from the
rising edge of the last WE (or CE) will initiate the execution of the Sector Erase command(s). If another falling edge of the WE (or CE) occurs within the 80 µs
time-out window, the timer is reset. During the 80 µs
window, any command other than Sector Erase or
Erase Suspend written to the device will reset the device back to Read mode. Once the 80 µs window has
timed out, only the Erase suspend command is recognized. Note that although the Reset command is not
recognized in the Erase Suspend mode, the device is
available for read or program operations in sectors that
are not erase suspended. The Erase Suspended and
Erase Resume commands may be written as often as
required during a sector erase operation. Hence, once
erase has begun, it must ultimately complete unless
Hardware Reset is initiated. Loading the sector erase
registers may be done in any sequence and with any
number of sectors (0 to 18).
Further status of device activity during the sector erase
operation can be determined using toggle bits DQ2 and
DQ3.
Figure 5 illustrates the Embedded Erase Algorithm,
using a typical command sequence and bus operations.
Erase Suspend
The Erase Suspend command allows the user to interrupt a Sector Erase operation and then perform data
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
When the Erase Suspend command is written during a
Sector Erase operation, the chip will take between 0.1
µs and 20 µs to actually suspend the operation and go
into erase suspended read mode (pseudo-read mode),
at which time the user can read or program from a sector that is not erase suspended. Reading data in this
mode is the same as reading from the standard read
mode, except that the data must be read from sectors
that have not been erase suspended.
Successively reading from the erase-suspended sector
while the device is in the erase-suspend-read mode will
cause DQ2 to toggle. Polling DQ2 on successive reads
from a given sector provides the system the ability to
determine if a sector is in Erase Suspend.
After entering the erase-suspend-read mode, the user
can program the device by writing the appropriate command sequence for Byte Program. This program mode
is known as the erase suspend-program mode. Again,
programming in this mode is the same as programming
in the regular Byte Program mode, except that the data
must be programmed to sectors that are not erase suspended. Successively reading from the erase suspended sector while the device is in the erase
suspend-program mode will cause DQ2 to toggle.
Completion of the erase suspend operation can be determined two ways:
■ Checking the status of the toggle bit DQ2
■ Checking the status of the RY/BY pin
To resume the operation of Sector Erase, the Resume
command (30H) should be written. Any further writes of
the Resume command at this point will be ignored.
However, another Erase Suspend command can be
written after the device has resumed sector erase operations.
When the erase operation has been suspended, the
device defaults to the erase-suspend-read mode.
Reading data in this mode is the same as reading from
the standard read mode except that the data must be
r e a d f r o m s e c t o r s t h a t h ave n o t b e e n
erase-suspended.
To resume the operation of Sector Erase, the Resume
command (30H) should be written. Any further writes of
the Resume command at this point will be ignored. Another Erase Suspend command can be written after the
chip has resumed erasing.
Write Operation Status
Address Sensitivity of Write Status Flags
Detailed in Table 6 are all the status flags that can be
used to check the status of the device for current mode
operation. During Sector Erase, the part provides the
status flags automatically to the I/O ports. The information on DQ2 is address sensitive. This means that if an
address from an erasing sector is consecutively read,
then the DQ2 bit will toggle. However, DQ2 will not toggle if an address from a non-erasing sector is consecutively read. This allows the user to determine which
sectors are erasing and which are not.
Once Erase Suspend is entered, address sensitivity
still applies. If the address of a non-erasing sector (that
is, one available for read) is provided, then stored data
can be read from the device. If the address of an erasing sector (that is, one unavailable for read) is applied,
the device will output its status bits. Confirmation of status bits can be done by doing consecutive reads to toggle DQ2, which is active throughout the Embedded
Erase mode, including Erase Suspend.
In order to effectively use DATA Polling to determine if
the device has entered into erase-suspended mode, it
is necessary to apply a sector address from a sector
being erased.
Am29LV008T/Am29LV008B
15
3.0 V-only Flash
read or programs in a sector not being erased. This
command is applicable only during the Sector Erase
operation, which includes the time-out period for Sector
Erase. The Erase Suspend command will be ignored if
written during the execution of the Chip Erase operation or Embedded Program Algorithm (but will reset the
chip if written improperly during the command sequences.) Writing the Erase Suspend command during
the Sector Erase time-out results in immediate termination of the time-out period and suspension of the erase
operation. Once in Erase Suspend, the device is available for read (note that in the Erase Suspend mode, the
Reset/Read command is not required for read operations and is ignored) or program operations in sectors
not being erased. Any other command written during
the Erase Suspend mode will be ignored, except for the
Erase Resume command. Writing the Erase Resume
command resumes the sector erase operation. The addresses are “don’t cares” when writing the Erase Suspend or Erase Resume command.
P R E L I M I N A R Y
Table 6.
Hardware Sequence Flags
Status
DQ7
DQ6
DQ5
DQ3
DQ2
RY/BY
DQ7
Toggle
0
0
No Toggle
0
Program/Erase in Auto-Erase
0
Toggle
0
1
(Note 1)
0
Erase Sector Address
Erase
Suspend
Mode
Non-Erase Sector Address
1
No Toggle
0
0
Toggle
(Note 1)
1
Data
Data
Data
Data
Data (Note
2)
1
DQ7
(Note 2)
Toggle
0
0
1
(Note 2)
0
DQ7
Toggle
1
0
No Toggle
0
0
Toggle
1
1
(Note 3)
0
DQ7
Toggle
1
0
No Toggle
0
Programming
In Progress
Program in Erase Suspend
Programming
Exceeded
Time Limits
Program/Erase in Auto-Erase
Program in Erase Suspend
Notes:
1. DQ2 can be toggled when the sector address applied is that of an erasing or erase suspended sector. Conversely, DQ2 cannot
be toggled when the sector address applied is that of a non-erasing or non-erase suspended sector. DQ2 is therefore used
to determine which sectors are erasing or erase suspended and which are not.
2. These status flags apply when outputs are read from the address of a non-erase-suspended sector.
3. If DQ5 is high (exceeded timing limits), successive reads from a problem sector will cause DQ2 to toggle.
DQ7: Data Polling
The Am29LV008 features DATA Polling as a method to
indicate to the host system that the embedded algorithms are in progress or completed.
During the Embedded Program Algorithm, an attempt
to read the device will produce the compliment of the
data last written to DQ7. Upon completion of the Embedded Program Algorithm, an attempt to read the device will produce the true data last written to DQ7. Note
that just at the instant when DQ7 switches to true data,
the other bits, DQ6–DQ0, may not yet be true data.
However, they will all be true data on the next read from
the device. Please note that Data Polling (DQ7) may
give an inaccurate result when an attempt is made
to write to a protected sector. During an Embedded
Erase Algorithm, an attempt to read the device will produce a ‘0’ at the DQ7 output. Upon completion of the
Embedded Erase Algorithm, an attempt to read
t h e d ev i c e w i l l p r o d u c e a ‘ 1 ’ a t D Q 7 .
For chip erase, the DATA Polling is valid (DQ7 = 1) after
the rising edge of the sixth WE pulse in the six write
pulse sequence. For sector erase, the DATA Polling is
valid after the last rising edge of the sector erase WE
pulse. DATA Polling must be performed at sector addresses within any of the sectors being erased and not
a sector that is within a protected sector. Otherwise, the
status may not be valid.
Just prior to the completion of Embedded Algorithm operations, DQ7 may change asynchronously while the
output enable (OE) is asserted low. This means that the
16
device is driving status information on DQ7 at one instant of time and in the next instance of time, that byte
has valid data. Depending on when the system samples the DQ7 output, it may read the status or valid
data. Even if the device has completed the Embedded
Algorithm operations and DQ7 has valid data, DQ0–
DQ6 may still provide write operation status. The valid
data on DQ0–DQ7 can be read on the next successive
read attempt.
The DATA Polling feature is only active during the Embedded Programming Algorithm, Embedded Erase Algorithm, Erase Suspend, erase suspend-program
mode, or sector erase time-out (see Table 6).
If the user attempts to write to a protected sector, DATA
Polling will be activated for about 1 µs; the device will
then return to read mode, with data from the protected
sector unchanged. If the user attempts to erase a protected sector, Toggle Bit will be activated for about 50
µs; the device will then return to read mode, without
having erased the protected sector.
See Figure 6 for the DATA Polling timing specifications
and diagrams.
DQ6: Toggle Bit
The Am29LV008 also features a “Toggle Bit” as a
method to indicate to the host system whether the embedded algorithms are in progress or completed.
During an Embedded Program or Erase Algorithm,
successive attempts to read data from the device will
result in DQ6 toggling between one and zero. Once the
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
Either CE or OE toggling will cause DQ6 to toggle. If
the user attempts to write to a protected sector, DATA
Polling will be activated for about 1 µs; the device will
then return to read mode, with data from the protected
sector unchanged. If the user attempts to erase a protected sector, Toggle Bit will be activated for about 50
µs; the device will then return to read mode, without
having erased the protected sector.
DQ5: Exceeded Timing Limits
DQ5 will indicate if the program or erase time has exceeded the specified limits (internal pulse count).
Under these conditions, DQ5 will produce a ‘1’ indicating that the program or erase cycle was not successfully completed. Write operation status and reset
command are the only operating functions under this
condition. The device will draw active power under this
condition.
The DQ5 failure condition will also appear if the user attempts to write a data ‘1’ to a bit that has already been
programmed to a data ‘0’. In this case, the DQ5 failure
condition is not guaranteed to happen, since the device
was incorrectly used. Please note that programming a
data ‘0’ to a data ‘1’ should never be attempted, and
only erasure should be used for this purpose. If programming to a data ‘1’ is attempted, the device should
be reset.
If the DQ5 failure condition is observed while in Sector
Erase mode (that is, exceeded timing limits), then DQ2
can be used to determine which sector had the problem. This is especially useful when multiple sectors
have been loaded for erase.
DQ3: Sector Erase Timer
After the completion of the initial Sector Erase command sequence, the Sector Erase time-out will begin.
DQ3 will remain low until the time-out is complete.
DATA Polling (DQ7) and Toggle Bit (DQ6) are also valid
after the first sector erase command sequence.
If DATA Polling or the Toggle Bit indicates the device
has been written with a valid Sector Erase command,
DQ3 may be used to determine if the sector erase timer
window is still open. If DQ3 is high (‘1’), the internally
controlled erase cycle has begun; attempts to write
subsequent commands to the device will be ignored
until the erase operation is completed as indicated by
the DATA Polling or Toggle Bit. If DQ3 is low (‘0’), the
device will accept additional sector erase commands.
To be certain the command has been accepted, the
software should check the status of DQ3 following each
Sector Erase command. If DQ3 was high on the second status check, the command may not have been accepted.
It is recommended that the user guarantee the time between sector erase command writes be less than 80 µs
by disabling the processor interrupts just for the duration of the Sector Erase (30H) commands. This approach will ensure that sequential sector erase
command writes will be written to the device while the
sector erase timer window is still open.
DQ2: Toggle Bit 2
This toggle bit, along with DQ6, can be used to determine whether the device is in the Embedded Erase Algorithm or in Erase Suspend.
Successive reads from the erasing sector will cause
DQ2 to toggle during the Embedded Erase Algorithm.
If the device is in the erase-suspend-read mode, successive reads from the erase-suspended sector will
cause DQ2 to toggle. When the device is in the erase
suspend-program mode, successive reads from the
byte address of the non-erase suspended sector will indicate a logic ‘1’ at the DQ2 bit. Note that a sector which
is selected for erase is not available for read in Erase
Suspend mode. Other sectors which are not selected
for Erase can be read in Erase Suspend.
DQ6 is different from DQ2 in that DQ6 toggles only
when the standard program or erase, or erase
suspend-program operation is in progress.
If the DQ5 failure condition is observed while in Sector
Erase mode (that is, exceeded timing limits), the DQ2
toggle bit can give extra information. In this case, the
normal function of DQ2 is modified. If DQ5 is at logic
‘1’, then DQ2 will toggle with consecutive reads only at
the sector address that caused the failure condition.
DQ2 will toggle at the sector address where the failure
occurred and will not toggle at other sector addresses.
Am29LV008T/Am29LV008B
17
3.0 V-only Flash
Embedded Program or Erase Algorithm is completed,
DQ6 will stop toggling and valid data can be read on
the next successive attempts. During programming, the
Toggle Bit is valid after the rising edge of the fourth WE
pulse in the four-write-pulse sequence. During Chip
erase, the Toggle Bit is valid after the rising edge of the
sixth WE pulse in the six-write-pulse sequence. During
Sector erase, the Toggle Bit is valid after the last rising
edge of the sector erase WE pulse. The Toggle Bit is
active during the Sector Erase time-out.
P R E L I M I N A R Y
RY/BY: Ready/Busy Pin
The Am29LV008 provides a RY/BY open-drain output
pin as a way to indicate to the host system that the Embedded Algorithms are either in progress or have been
completed. If the output is low, the device is busy with
either a program or erase operation. If the output is
high, the device is ready to accept any read/write or
erase operation. When the RY/BY pin is low, the device
will not accept any additional program or erase commands with the exception of the Erase Suspend command. If the Am29LV008 is placed in an Erase
Table 7.
Mode
Suspend mode, the RY/BY output will be high. For programming, the RY/BY is valid (RY/BY=0) after the rising edge of the fourth WE pulse in the four write pulse
sequence. For chip erase, the RY/BY is valid after the
rising edge of the sixth WE pulse in the six write pulse
sequence. For sector erase, the RY/BY is also valid
after the rising edge of the sixth WE pulse.
Since the RY/BY pin is an open-drain output, several
RY/BY pins can be tied together in parallel with a
pull-up resistor to VCC.
Toggle Bit Status
DQ7
DQ6
DQ2
DQ7
Toggles
1
Erase
0
Toggles
Toggles
Erase-Suspend Read (Note 1) (Erase-Suspended Sector)
1
1
Toggles
DQ7 (Note 2)
Toggles
1 (Note 2)
Program
Erase Suspend Program
Notes:
1. These status flags apply when outputs are read from a sector that has been erase suspended.
2. These status flags apply when outputs are read from the addresses of the non-erase suspended sector.
CE
LAST_BUS_CYCLE
WE
RY/BY
tBUSY
20511C-4
Figure 1.
18
RY/BY Timing Diagram
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
ecuting (RY/BY pin is high), the reset operation will be
complete within 500 ns.
RESET: Hardware Reset Pin
Asserting RESET during a program or erase operation
leaves erroneous data stored in the address locations
being operated on at the time of device reset. These locations need updating after the reset operation is complete. See Figure 2 for timing specifications.
The device enters ICC4 standby mode (200 nA) when
VSS ± 0.3 V is applied to the RESET pin. The device can
enter this mode at any time, regardless of the logical
condition of the CE pin. Furthermore, entering ICC4
during a program or erase operation leaves erroneous
data in the address locations being operated on at the
time of the RESET pulse. These locations need updating after the device resumes standard operations. After
the RESET pin goes high, a minimum latency period of
50 ns must occur before a valid read can take place.
If RESET is asserted during a program or erase operation, the RY/BY pin will remain low until the reset operation is internally complete. This will require between
1 µs and 20 µs. Hence the RY/BY pin can be used to
signal that the reset operation is complete. Otherwise,
allow for the maximum reset time of 20 µs. If RESET is
asserted when a program or erase operation is not ex-
tRL
RESET
RY/BY
tRRB
20511C-5
Figure 2.
Device Reset During a Program or Erase Operation
tRP
RESET
RY/BY
0V
20511C-6
Figure 3.
Device Reset During Read Mode
Am29LV008T/Am29LV008B
19
3.0 V-only Flash
The RESET pin is an active low signal. A logic ‘0’ on
this pin will force the device out of any mode that is currently executing back to the reset state. This allows a
system reset to take effect immediately without having
to wait for the device to finish a long execution cycle. To
avoid a potential bus contention during a system reset,
the device is isolated from the data I/O bus by tri-stating
the data output pins for the duration of the RESET
pulse.
P R E L I M I N A R Y
Data Protection
Write Pulse “Glitch” Protection
The Am29LV008 is designed to offer protection against
accidental erasure or programming caused by spurious
system level signals that may exist during power transitions. During power-up, the device automatically resets
the internal state machine to the read mode. Also, with
its control register architecture, alteration of the memory contents only occurs after successful completion of
the command sequences.
Noise pulses of less than 5 ns (typical) on OE, CE, or
WE will not change the command registers.
The Am29LV008 incorporates several features to prevent inadvertent write cycles resulting from V CC
power-up and power-down transitions or system noise.
Low VCC Write Inhibit
Logical Inhibit
Writing is inhibited by holding any one of OE = VIL, CE
= VIH, or WE = VIH. To initiate a write, CE and WE must
be logical zero while OE is a logical one.
Power-Up Write Inhibit
Power up of the device with WE = CE = VIL and OE =
VIH will not accept commands on the rising edge of WE.
The internal state machine is automatically reset to
read mode on power up.
To avoid initiation of a write cycle during VCC power-up
and power-down, a write cycle is locked out for VCC
less than VLKO (lock-out voltage). If VCC < VLKO, the
command register is disabled and all internal program/
erase circuits are disabled. Under this condition, the
device will reset to read mode. Subsequent writes will
be ignored until the VCC level is greater than VLKO. It is
the user’s responsibility to ensure that the control levels
are logically correct when VCC is above VLKO (unless
the RESET pin is asserted).
20
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
EMBEDDED ALGORITHMS
Embedded Program Algorithm
3.0 V-only Flash
START
Write Program Cmd Sequence
Data Poll Device
No
Verify Byte?
Yes
Increment Address
No
Last Address?
Yes
Programming Completed
20511C-7
Figure 4.
Bus Operation
Embedded Program Algorithm
Command Sequence
Comments
Program
Valid Address/Data
Standby*
Write
Read
DATA Polling to Verify Programming
Standby*
Compare Data Output to Data Expected
* Device is either powered-down, erase inhibit, or program inhibit.
Am29LV008T/Am29LV008B
21
P R E L I M I N A R Y
Embedded Erase Algorithm
START
Write Erase Cmd Sequence
Data Poll from Device
No
Data = FFH?
Yes
Erasure Completed
20511C-8
Figure 5.
Bus Operation
Embedded Erase Algorithm
Command Sequence
Comments
Standby
Write
22
Erase
Read
DATA Polling to Verify Erasure
Standby
Compare Output to FFH
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
Data Polling Algorithm
3.0 V-only Flash
START
DQ7 = Data?
Yes
No
No
DQ5 = 1?
Yes
DQ7 = Data?
Yes
No
FAIL
PASS
20511C-9
Figure 6.
Data Polling Algorithm
Am29LV008T/Am29LV008B
23
P R E L I M I N A R Y
Toggle Bit Algorithm
START
DQ6 = Toggle?
No
Yes
No
DQ5 = 1?
Yes
DQ6 = Toggle?
No
Yes
FAIL
PASS
20511C-10
Figure 7.
Toggle Bit Algorithm
Temporary Sector Unprotect Algorithm
Start
RESET = VID
(Note 1)
Perform Erase or
Program Operations
RESET = VIH
Temporary Sector
Unprotect Completed
(Note 2)
Notes:
1. All protected sectors unprotected.
2. All previously protected sectors are protected once again.
20511C-11
Figure 8.
24
Temporary Sector Unprotect Algorithm
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
OPERATING RANGES
Storage Temperature
Plastic Packages . . . . . . . . . . . . . . . -65°C to +150°C
Commercial (C) Devices
Ambient Temperature
with Power Applied. . . . . . . . . . . . . . -55°C to +125°C
Industrial (I) Devices
Voltage with Respect to Ground
All pins except A9, OE and RESET
(Note 1) . . . . . . . . . . . . . . . . . . . . -0.5 V to VCC+0.5 V
Ambient Temperature (TA). . . . . . . . . . . . 0˚C to +70˚C
Ambient Temperature (TA). . . . . . . . . . –40˚C to +85˚C
Extended (E) Devices
Ambient Temperature (TA). . . . . . . . . –55˚C to +125˚C
VCC (Note 1). . . . . . . . . . . . . . . . . . . . -0.5 V to +3.6 V
VCC Supply Voltages
A9, OE, and RESET (Note 2). . . . . . -0.5 V to +13.0 V
VCC for Am29LV008T/B-90R. . . . . . . . +3.0 V to 3.6 V
Output Short Circuit Current (Note 3) . . . . . . 200 mA
VCC for Am29LV008T/B-100,
-120, -150 . . . . . . . . . . . . . . . . . . . . . . +2.7 V to 3.6 V
Notes:
1. Minimum DC voltage on input or I/O pins is -0.5 V. During
voltage transitions, input or I/O pins may undershoot VSS
to -2.0 V for periods of up to 20 ns. Maximum DC voltage
on input or I/O pins is VCC +0.5 V. During voltage
transitions, input or I/O pins may overshoot to VCC +2.0 V
for periods up to 20 ns. See Tables 10 and 11.
Operating ranges define those limits between which the functionality of the device is guaranteed.
2. Minimum DC input voltage on pins A9, OE, and RESET is
-0.5 V. During voltage transitions, A9, OE, and RESET
may undershoot VSS to -2.0 V for periods of up to 20 ns.
Maximum DC input voltage on pin A9 is +12.5 V which
may overshoot to 14.0 V for periods up to 20 ns. See
Tables 10 and 11.
3. No more than one output may be shorted to ground at a
time. Duration of the short circuit should not be greater
than one second.
4. Stresses above those listed under “Absolute Maximum
Ratings” may cause permanent damage to the device.
This is a stress rating only; functional operation of the device at these or any other conditions above those indicated in the operational sections of this data sheet is not
implied. Exposure of the device to absolute maximum rating conditions for extended periods may affect device reliability.
Am29LV008T/Am29LV008B
25
3.0 V-only Flash
ABSOLUTE MAXIMUM RATINGS
P R E L I M I N A R Y
DC CHARACTERISTICS
CMOS Compatible
Parameter
Symbol
Parameter Description
Test Conditions
Min
Max
Unit
±1.0
µA
35
µA
±1.0
µA
ILI
Input Load Current
VIN = VSS to VCC, VCC = VCC max
ILIT
A9 Input Load Current
VCC = VCC max;
A9 = 13.0 V
ILO
Output Leakage Current
VOUT = VSS to VCC, VCC = VCC max
VCC Active Current
(Note 1)
CE = VIL, OE = VIH at 5 MHz
16
mA
ICC1
CE = VIL, OE = VIH at 1 MHz
4
mA
ICC2
VCC Active Current
(Notes 1, 2, and 4)
CE = VIL, OE = VIH
30
mA
ICC3
VCC Standby Current
VCC = VCC max;
CE, RESET = VCC ± 0.3 V
5
µA
ICC4
VCC Standby Current During Reset
VCC = VCC max; CE = VCC ± 0.3 V;
RESET = VSS ± 0.3 V
5
µA
ICC5
Automatic Sleep Mode (Note 3)
5
µA
VIL
Input Low Voltage
-0.5
0.8
V
VIH
Input High Voltage
0.7 x VCC
VCC + 0.3
V
VID
Voltage for Autoselect and Temporary
VCC = 3.3 V
Sector Unprotect
11.5
12.5
V
VOL
Output Low Voltage
0.45
V
VOH1
VIH = VCC ± 0.3 V; VIL = VSS ± 0.3 V
IOL = 4.0 mA, VCC = VCC min
Output High Voltage
VOH2
VLKO
IOH = -2.0 mA, VCC = VCC min
0.85 VCC
IOH = -100 µA, VCC = VCC min
VCC-0.4
Low VCC Lock-Out Voltage (Note 4)
2.3
V
2.5
V
Notes:
1. The ICC current listed includes both the DC operating current and the frequency dependent component (at 5 MHz). The
frequency component typically is less than 2 mA/MHz, with OE at VIH.
2. ICC active while Embedded Erase or Embedded Program is in progress.
3. Automatic sleep mode enables the low power mode when addresses remain stable for 200 ns. Typical sleep mode current is
200 nA.
4. Not 100% tested.
26
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
DC CHARACTERISTICS (CONTINUED)
3.0 V-only Flash
Supply Current in mA
25
20
15
10
5
0
0
500
1000
1500
2000
2500
3000
3500
4000
Time in ns
Note: Addresses are switching at 1 MHz
20511C-11A
Figure 8A.
ICC Current vs. Time
Supply Current in mA
15
10
3.6 V
2.7 V
5
0
1
2
3
Frequency in MHz
Note: T = 25 °C
4
5
20511C-11B
Figure 8B.
ICC vs. Frequency
Am29LV008T/Am29LV008B
27
P R E L I M I N A R Y
AC CHARACTERISTICS
Read-Only Operations Characteristics
Parameter Symbols
Speed Option (Note 1)
JEDEC
Standard
Description
Test Setup
-90R
-100
-120
-150
Unit
tAVAV
tRC
Read Cycle Time (Note 3)
Min
90
100
120
150
ns
tAVQV
tACC
Address to Output Delay
CE = VIL
OE = VIL
Max
90
100
120
150
ns
tELQV
tCE
Chip Enable to Output Delay
OE = VIL
Max
90
100
120
150
ns
tGLQV
tOE
Output Enable to Output Delay
Max
40
40
50
55
ns
tEHQZ
tDF
Chip Enable to Output High Z (Notes 2, 3)
Max
30
30
30
40
ns
tGHQZ
tDF
Output Enable to Output High Z (Notes 2, 3)
Max
30
30
30
40
ns
tAXQX
tOH
Output Hold Time From Addresses, CE or
OE, Whichever Occurs First (Note 3)
Min
0
0
0
0
ns
tReady
RESET Pin Low to Read Mode (Note 3)
Max
20
20
20
20
µs
Notes:
1. Test Conditions
Input Rise and Fall Times: 5 ns
Input Pulse Levels: 0.0 V to 3.0 V
Timing Measurement Reference Level:
Input: 1.5 V
Output: 1.5 V
2. Output Driver Disable Time
3. Not 100% tested.
3.3 V
IN3064
or Equivalent
Device
Under
Test
CL
2.7 kΩ
6.2 kΩ
IN3064 or Equivalent
IN3064 or Equivalent
IN3064 or Equivalent
Notes:
CL = 30 pF for 90 and 100 ns
CL = 100 pF for 120 and 150 ns
20511C-12
Figure 9.
28
Test Conditions
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
AC CHARACTERISTICS
Write (Erase/Program) Operations
JEDEC
Standard Description
-90R
-100
-120
-150
Unit
tAVAV
tWC
Write Cycle Time (Note 2)
Min
90
100
120
150
ns
tAVWL
tAS
Address Setup Time
Min
0
0
0
0
ns
tWLAX
tAH
Address Hold Time
Min
50
50
50
65
ns
tDVWH
tDS
Data Setup Time
Min
50
50
50
65
ns
tWHDX
tDH
Data Hold Time
Min
0
0
0
0
ns
tOES
Output Enable Setup Time (Note 2)
Min
0
0
0
0
ns
Read (Note 2)
Min
0
0
0
0
ns
tOEH
Output
Enable Hold
Time
Toggle and Data Polling
(Note 2)
Min
10
10
10
10
ns
tGHWL
tGHWL
Read Recovery Time Before Write
(OE High to WE Low)
Min
0
0
0
0
ns
tELWL
tCS
CE Setup Time
Min
0
0
0
0
ns
tWHEH
tCH
CE Hold Time
Min
0
0
0
0
ns
tWLWH
tWP
Write Pulse Width
Min
50
50
50
65
ns
tWHWL
tWPH
Write Pulse Width High
Min
30
30
30
35
ns
tWHWH1
tWHWH1
Programming Operation
Typ
9
9
9
9
µs
tWHWH2
tWHWH2
Sector Erase Operation (Note 1)
Typ
1
1
1
1
sec
tVCS
VCC Setup Time
Min
50
50
50
50
µs
tRB
Write Recovery Time from RY/BY
Min
0
0
0
0
ns
tRH
RESET High Time Before Read
Min
50
50
50
50
ns
tRPD
RESET To Power Down Time
Min
20
20
20
20
µs
tBUSY
Program/Erase Valid to RY/BY Delay
Min
90
90
90
90
ns
tVIDR
Rise Time to VID
Min
500
500
500
500
ns
tRP
RESET Pulse Width
Min
500
500
500
500
ns
t RRB
RESET Low to RY/BY High
Max
20
20
20
20
µs
tRSP
RESET Setup Time for Temporary Sector
Unprotect
Min
4
4
4
4
µs
Notes:
1. The duration of the program or erase operation is variable and is calculated in the internal algorithms.
2. Note 100% tested.
Am29LV008T/Am29LV008B
29
3.0 V-only Flash
Parameter Symbols
P R E L I M I N A R Y
KEY TO SWITCHING WAVEFORMS
WAVEFORM
INPUTS
OUTPUTS
Must be
Steady
Will be
Steady
May
Change
from H to L
Will be
Changing
from H to L
May
Change
from L to H
Will be
Changing
from L to H
Don’t Care,
Any Change
Permitted
Changing,
State
Unknown
Does Not
Apply
Center
Line is HighImpedance
“Off” State
KS000010-PAL
20 ns
20 ns
+0.8 V
–0.5 V
–2.0 V
20 ns
20511C-13
Figure 10.
Maximum Negative Overshoot Waveform
20 ns
VCC + 2.0 V
VCC + 0.5 V
2.0 V
20 ns
20 ns
20511C-14
Figure 11.
30
Maximum Positive Overshoot Waveform
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
SWITCHING WAVEFORMS
3.0 V-only Flash
tRC
Addresses Stable
Addresses
tACC
CE
tDF
tOE
OE
tOEH
tCE
WE
tOH
HIGH Z
HIGH Z
Output Valid
Outputs
20511C-15
Figure 12.
tWC
ADDRESSES
AC Waveforms for Read Operations
Data Polling
tAS
555H
PA
PA
tAH
tRC
CE
tGHWL
OE
tWP
WE
tCS
tWHWH1_or_2
tDF
tWPH
tDS
tOE
tDH
A0H
DATA
PD
DQ7
DOUT
tOH
VCC
tCE
tVCS
Notes:
1. DQ7 is the output of the complement of the data written to the device.
2. DOUT is the output of the data written to the device.
3. PA is the address of the memory location to be programmed.
4. PD is the data to be programmed at the byte address.
5. Illustration shows the last two cycles of a four-bus-cycle sequence..
20511C-16
Figure 13.
AC Waveforms for Program Operations
Am29LV008T/Am29LV008B
31
P R E L I M I N A R Y
SWITCHING WAVEFORMS
tWC
tAS
555H
ADDRESSES
555H for chip erase
AAAH
555H
555H
AAAH
SA
tAH
CE
tGHWL
OE
tWP
WE
tCS
tWPH
tDS
10H for Chip Erase
tDH
DATA
55H
AAH
80H
AAH
55H
30H
VCC
Note:
1. SA is the sector address for Sector Erase.
20511C-17
Figure 14.
AC Waveforms for Chip/Sector Erase Operations
tCH
CE
tDF
tOE
OE
tOEH
WE
tCE
*
DQ7
DQ7
tOH
DQ7=Valid Data
HIGH Z
tWHWH1_or_2
DQ0-DQ6
DQ0-DQ6=Invalid Data
DQ0-DQ6 Valid Data
HIGH Z
* DQ7 = Valid Data (The device has completed the embedded operation.)
20511C-18
Figure 15.
32
AC Waveforms for Data Polling During Embedded Algorithm Operations
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
SWITCHING WAVEFORMS
CE
3.0 V-only Flash
tOEH
WE
tOES
OE
*
Data (DQ0-DQ7)
DQ6=Toggle
DQ6=Toggle
DQ6=Stop Toggling
DQ0-DQ7
Data Valid
tOE
DQ6 stops toggling (The device has completed the embedded operation.)
20511C-19
Figure 16.
AC Waveforms for Toggle Bit During Embedded Algorithm Operations
CE
The rising edge of the last WE signal
WE
Entire programming
or erase operations
RY/BY
tBUSY
DQ7 = Valid Data (The device has completed the embedded operation.)
20511C-20
Figure 17.
RY/BY Timing Diagram During Program/Erase Operations
RESET
tRP
tReady
20511C-21
Figure 18.
RESET Timing Diagram
Am29LV008T/Am29LV008B
33
P R E L I M I N A R Y
SWITCHING WAVEFORMS
tVIDR
12 V
RESET
0 V or 3 V
0 V or 3 V
CE
WE
tRSP
Program or Erase Command Sequence
20511C-22
Figure 19.
34
Temporary Sector Unprotect Timing Diagram
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
AC CHARACTERISTICS
Write (Erase/Program) Operations
Parameter Symbols
JEDEC
Standard
Description
-90R
-100
-120
-150
Unit
tAVAV
tWC
Write Cycle Time (Note 1)
Min
90
100
120
150
ns
tAVEL
tAS
Address Setup Time
Min
0
0
0
0
ns
tELAX
tAH
Address Hold Time
Min
50
50
50
65
ns
tDVEH
tDS
Data Setup Time
Min
50
50
50
65
ns
tEHDX
tDH
Data Hold Time
Min
0
0
0
0
ns
tOES
Output Enable Setup Time
Read (Note 1)
Min
0
0
0
0
ns
Min
0
0
0
0
ns
tOEH
Output Enable
Toggle and Data Polling
Hold Time
(Note 1)
Min
10
10
10
10
ns
tGHEL
tGHEL
Read Recovery Time Before Write
(OE High to WE Low)
Min
0
0
0
0
ns
tWLEL
tWS
WE Setup Time
Min
0
0
0
0
ns
tEHWH
tWH
WE Hold Time
Min
0
0
0
0
ns
tELEH
tCP
CE Pulse Width
Min
50
50
50
65
ns
tEHEL
tCPH
CE Pulse Width High
Min
30
30
30
35
ns
tWHWH1
tWHWH1
Programming Operation
Typ
9
9
9
9
µs
tWHWH2
tWHWH2
Sector Erase Operation (Note 3)
Typ
1
1
1
1
sec
Notes:
1. Not 100% tested.
2. The duration of the program or erase operation is variable and is calculated in the internal algorithms.
3. Does not include the preprogramming time.
Am29LV008T/Am29LV008B
35
3.0 V-only Flash
Alternate CE Controlled Writes
P R E L I M I N A R Y
SWITCHING WAVEFORMS
tWC
ADDRESSES
Data Polling
tAS
555H
PA
PA
tAH
WE
tGHWL
OE
tCP
CE
tWS
tWHWH1_or_2
tCPH
tDS
tDH
A0H
DATA
PD
DQ7
DOUT
VCC
tVCS
Notes:
1. PA is address of the memory location to be programmed.
2. PD is data to be programmed at byte address.
3. DQ7 is the complement of the data written to the device.
4. DOUT is the data written to the device.
5. Figure indicates last two bus cycles of four bus cycle sequence.
20511C-23
Figure 20.
36
Alternate CE Controlled Write Operation Timings
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
ERASE AND PROGRAMMING PERFORMANCE
Parameter
Max (Note 3)
Unit
Sector Erase Time
1
15
s
Chip Erase Time
19
Byte Programming Time
9
300
µs
Chip Programming Time
9
27
s
Erase/Program Endurance
s
1,000,000
cycles
Comments
Excludes 00h programming
prior to erasure (Note 4)
Excludes system level overhead
(Note 5)
Minimum 100,000 cycles
guaranteed
Notes:
1. The typical program and erase times are considerably less than the maximum times since most bytes program or erase
significantly faster than the worst case byte. The device enters the failure mode (DQ5=“1”) only after the maximum times given
are exceeded. See the section on DQ5 for further information.
2. Except for erase and program endurance, the typical program and erase times assume the following conditions: 25°C, 3.0 V
VCC, 100,000 cycles. Additionally, programming typicals assume checkerboard pattern.
3. Under worst case conditions of 90˚C, VCC = 2.7 V, 100,000 cycles.
4. In the pre-programming step of the Embedded Erase algorithm, all bytes are programmed to 00h before erasure.
5. System-level overhead is the time required to execute the four-bus-cycle sequence for the program command. See Table 5
for further information on command definitions.
LATCHUP CHARACTERISTICS
Min
Max
Input voltage with respect to VSS on all pins except I/O pins
(including A9, OE, and RESET)
-1.0 V
13.0 V
Input voltage with respect to VSS on all I/O pins
-1.0 V
VCC + 1.0 V
-100 mA
+100 mA
VCC Current
Includes all pins except VCC. Test conditions: VCC = 3.0 V, one pin at a time.
TSOP PIN CAPACITANCE (Notes 1–2)
Parameter
Symbol
Parameter Description
Test Setup
Typ
Max
Unit
CIN
Input Capacitance
VIN = 0
6
7.5
pF
COUT
Output Capacitance
VOUT = 0
8.5
12
pF
CIN2
Control Pin Capacitance
VIN = 0
7.5
9
pF
Notes:
1. Sampled, not 100% tested.
2. Test conditions TA = 25˚C, f = 1.0 MHz.
Am29LV008T/Am29LV008B
37
3.0 V-only Flash
Typ (Note 2)
P R E L I M I N A R Y
DATA SHEET REVISION SUMMARY FOR
AM29LV008
Distinctive Characteristics:
Rearranged bullets. Renamed “2.7 to 3.6 volt, extended voltage range...” to “Single power supply operation.” Under “Single power supply operation” and “High
performance” bullets, defined standard and extended
voltage ranges and added 90 ns speed option. Combined “Advanced power management” and “Low current consumption” bullets into new “Ultra low power
consumption” bullet. Under that bullet, revised the typical standby and automatic sleep mode current specifications from 1 µA to 200 nA; revised read current
specification from 10 mA to 2 mA/MHz. Combined
“Sector protection” and “Flexible sector architecture”
bullets. Under flexible sector architecture bullet, added
temporary sector unprotect feature description. Combined Embedded Program and Embedded Erase bullets under new “Embedded Algorithms” bullet; removed
™ designations. Clarified descriptions of sector protection, erase suspend/resume, hardware reset pin,
ready/busy pin, and data polling and toggle bits.
General Description:
Added text on new speed option and voltage range to
the second paragraph.
Product Selector Guide:
sector protect verify. Added note 3 to explain sector
protect codes. In Note 8, changed A13 to A11, added
“unless otherwise noted”; is now new Note 6.
RESET: Hardware Reset Pin:
Fourth paragraph: Revised standby mode specification
to 200 nA.
Operating Ranges:
VCC Supply Voltages: Added 3.0 to 3.6 V voltage range
and -90R speed option.
DC Characteristics:
CMOS Compatible: Changed ICC1 from 30 mA maximum at 6 MHz to 16 mA maximum at 5 MHz and 4 mA
maximum at 1 MHz. Changed ICC2 from 35 mA to 30
mA maximum. In the VOL specification, changed the
IOL test condition from 5.8 to 4.0 mA. In Note 1,
changed 6 MHz to 5 MHz. In Note 3, changed address
stable time from 300 ns to 200 ns; changed typical automatic sleep mode current from 1 µA to 200 nA.
Figure 8A, ICC Current vs. Time, and Figure 8B, ICC
vs. Frequency:
Figure 8A illustrates current draw during the Automatic
Sleep Mode after the addresses are stable. Figure 8B
shows how frequency affects the current draw curves
for both voltage ranges.
AC Characteristics:
Added -90R voltage range and speed option.
Pin Configuration:
Read Only Operations Characteristics: Added -90R
column.
Added new voltage range for -90R to VCC specification.
Test Conditions, Figure 9:
Ordering Information, Standard Products:
Added 90 ns speed to CL note.
The -90R speed option is now listed in the example.
Revised “Speed Option” section to indicate both voltage ranges.
AC Characteristics:
Write/Erase/Program Operations: Added the -90R column.
Valid Combinations: Added -90R speed option and
voltage range.
Figure 13, AC Waveforms for Program Operations:
Automatic Sleep Mode:
Changed 5555H to 555H in addresses waveform to
match command definitions (Table 5).
Revised addresses stable time to 200 ns and current
draw to 200 nA.
Table 5, Command Definitions:
Grouped address designators PA, PD, RA, RD, and SA
under the legend heading. Modified SA definition to accommodate the sector protect verify command. Since
unlock addresses only require address bits A0–A10 to
be valid, the number of hexadecimal digits in the unlock
addresses were changed from four to three. The remaining upper address bits are don’t care. Removed
“H” designation from hexadecimal values in table and
replaced with new Note 1. Revised Notes 5 and 6 to indicate when commands are valid; are now new Notes
4 and 5. Expanded autoselect section to show each
function separately: manufacturer ID, device ID, and
38
Figure 14, AC Waveforms for Chip/Sector Erase
Operations:
Changed 5555H to 555H in addresses waveform to
match command definitions (Table 5).
Figure 19, Temporary Sector Unprotect Diagram:
Corrected callouts on RESET waveform to “0 V or 3 V”.
AC Characteristics:
Alternate CE Controlled Writes: Added the -90R column. Changed tAH from 45 to 50 ns for -100, from 50 to
65 ns for -150. Changed tDS from 50 to 65 ns for -150.
Changed tCP from 45 to 50 ns for -100, from 50 to 65
ns for -150. Changed tCPH from 20 to 30 ns for -100, 120; from 20 to 35 ns for -150.
Am29LV008T/Am29LV008B
P R E L I M I N A R Y
Figure 20, Alternate CE Controlled Write Operation
Timings:
Erase and Programming Performance:
Added typical chip erase specification. Renamed
erase/program cycles specification to erase/program
endurance. Corrected to indicate 1,000,000 cycle endurance is typical, not maximum, and that 100,000
Am29LV008T/Am29LV008B
39
3.0 V-only Flash
Changed 5555H to 555H in addresses waveform to
match command definitions (Table 5).
cycle endurance is minimum, not typical. Revised Note
1 to include write endurance; moved Note 1 references
in table to table head. Consolidated and moved Note 1
and Note 3 references in table to table head. Combined
Note 2 and Note 5 into new Note 1, which applies to the
entire table; revised to indicate that DQ5=1 after any
maximum time. Comments for program and erase now
straddle parameter rows. Separated the two sentences
in Note 4 into new Notes 4 and 5; added corresponding
note references to comment section.