MX29F4000
AUTOMATIC PROGRAMMING
AUTOMATIC ERASE ALGORITHM
The MX29F4000 is byte programmable using the
Automatic Programming algorithm. The Automatic
Programming algorithm makes the external system do
not need to have time out sequence nor to verify the data
programmed. The typical chip programming time at
room temperature of the MX29F4000 is less than 4
seconds.
MXIC's Automatic Erase algorithm requires the user to
write commands to the command register using standard
microprocessor write timings. The device will
automatically pre-program and verify the entire array.
Then the device automatically times the erase pulse
width, provides the erase verification, and counts the
number of sequences. A status bit toggling between
consecutive read cycles provides feedback to the user
as to the status of the programming operation.
AUTOMATIC CHIP ERASE
The entire chip is bulk erased using 10 ms erase pulses
according to MXIC's Automatic Chip Erase algorithm.
Typical erasure at room temperature is accomplished in
less than 4 second. The Automatic Erase algorithm
automatically programs the entire array prior to electrical
erase. The timing and verification of electrical erase are
controlled internally within the device.
Register contents serve as inputs to an internal statemachine which controls the erase and programming
circuitry. During write cycles, the command register
internally latches address and data needed for the
programming and erase operations. During a system
write cycle, addresses are latched on the falling edge of
WE or CE, whichever happeds later, and data are latched
on the rising edge of WE or CE, whichever happeds first.
AUTOMATIC SECTOR ERASE
MXIC's Flash technology combines years of EPROM
experience to produce the highest levels of quality,
reliability, and cost effectiveness. The MX29F4000
electrically erases all bits simultaneously using FowlerNordheim tunneling. The bytes are programmed by
using the EPROM programming mechanism of hot
electron injection.
The MX29F4000 is sector(s) erasable using MXIC's
Auto Sector Erase algorithm. Sector erase modes
allow sectors of the array to be erased in one erase
cycle. The Automatic Sector Erase algorithm
automatically programs the specified sector(s) prior to
electrical erase. The timing and verification of
electrical erase are controlled internally within the
device.
During a program cycle, the state-machine will control
the program sequences and command register will not
respond to any command set. During a Sector Erase
cycle, the command register will only respond to Erase
Suspend command. After Erase Suspend is completed,
the device stays in read mode. After the state machine
has completed its task, it will allow the command register
to respond to its full command set.
AUTOMATIC PROGRAMMING ALGORITHM
MXIC's Automatic Programming algorithm require the
user to only write program set-up commands (including
2 unlock write cycle and A0H) and a program command
(program data and address). The device automatically
times the programming pulse width, provides the program
verification, and counts the number of sequences. A
status bit similar to DATA polling and a status bit toggling
between consecutive read cycles, provide feedback to
the user as to the status of the programming operation.
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MX29F4000
TABLE1. SOFTWARE COMMAND DEFINITIONS
Command
First Bus
Second Bus
Third Bus
Fourth Bus
Fifth Bus
Sixth Bus
Bus
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Cycle
Addr
Data
Addr
Data
Addr
Data
Addr
Data
90H
ADI
DDI
Addr
Data
Addr
Data
Reset
1
XXXH
F0H
Read
1
RA
RD
Read Silicon ID
4
555H
AAH
2AAH 55H
555H
Sector Protect Verify
4
555H
AAH
2AAH 55H
555H 90H
(SA)X 00H
02
01H
Porgram
4
555H
AAH
2AAH 55H
555H A0H
PA
PD
Chip Erase
6
555H
AAH
2AAH 55H
555H
80H
555H
AAH
2AAH 55H
555H 10H
Sector Erase
6
555H
AAH
2AAH 55H
555H
80H
555H
AAH
2AAH 55H
SA
Sector Erase Suspend
1
XXXH
B0H
Sector Erase Resume
1
XXXH
30H
Unlock for sector
6
555H
AAH
2AAH 55H
555H
80H
555H
AAH
2AAH 55H
555H 20H
30H
protect/unprotect
Note:
1. ADI = Address of Device identifier; A1=0, A0 = 0 for manufacture code,A1=0, A0 = 1 for device code A2-A18=Do
not care.
(Refer to table 3)
DDI = Data of Device identifier : C2H for manufacture code, 99H for device code.
X = X can be VIL or VIH
RA=Address of memory location to be read.
RD=Data to be read at location RA.
2.PA = Address of memory location to be programmed.
PD = Data to be programmed at location PA.
SA = Address to the sector to be erased.
3.The system should generate the following address patterns: 555H or 2AAH to Address A10~A0 .
Address bit A11~A18=X=Don't care for all address commands except for Program Address (PA) and Sector
Address (SA). Write Sequence may be initiated with A11~A18 in either state.
4.For Sector Protect Verify Operation : If read out data is 01H, it means the sector has been protected.If read out data
is 00H,it means the sector is still not being protected.
COMMAND DEFINITIONS
Device operations are selected by writing specific address
and data sequences into the command register. Writing
incorrect address and data values or writing them in the
improper sequence will reset the device to the read
mode. Table 1 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. Either of the two
reset command sequences will reset the device(when
applicable).
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MX29F4000
TABLE 2. MX29F4000 BUS OPERATION
Mode
Pins
CE
OE
WE
A0
A1
A6
A9
Q0 ~ Q7
L
L
H
L
L
X
VID(2)
C2H
L
L
H
H
L
X
VID(2)
99H
Read
L
L
H
A0
A1
A6
A9
DOUT
Standby
H
X
X
X
X
X
X
HIGH Z
Output Disable
L
H
H
X
X
X
X
HIGH Z
Write
L
H
L
A0
A1
A6
A9
DIN(3)
Sector Protect with 12V
L
VID(2)
L
X
X
L
VID(2)
X
L
VID(2)
L
X
X
H
VID(2)
X
L
L
H
X
H
X
VID(2)
Code(5)
L
H
L
X
X
L
H
X
L
H
L
X
X
H
H
X
L
L
H
X
H
X
H
Code(5)
X
X
X
X
X
X
X
HIGH Z
Read Silicon ID
Manfacturer Code(1)
Read Silicon ID
Device Code(1)
system(6)
Chip Unprotect with 12V
system(6)
Verify Sector Protect
with 12V system
Sector Protect without 12V
system (6)
Chip Unprotect without 12V
system (6)
Verify Sector Protect/Unprotect
without 12V system (7)
Reset
NOTES:
1. Manufacturer and device codes may also be accessed via a command register write sequence. Refer to Table 1.
2. VID is the Silicon-ID-Read high voltage, 11.5V to 12.5V.
3. Refer to Table 1 for valid Data-In during a write operation.
4. X can be VIL or VIH.
5. Code=00H means unprotected.
Code=01H means protected.
A18~A16=Sector address for sector protect.
6. Refer to sector protect/unprotect algorithm and waveform.
Must issue "unlock for sector protect/unprotect" command before "sector protect/unprotect without 12V system"
command.
7. The "verify sector protect/unprotect without 12V sysytem" is only following "Sector protect/unprotect without 12V system"
command.
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MX29F4000
READ/RESET COMMAND
SET-UP AUTOMATIC CHIP/SECTOR ERASE
The read or reset operation is initiated by writing the
read/reset command sequence into the command
register. Microprocessor read cycles retrieve array
data. The device remains enabled for reads until the
command register contents are altered.
Chip erase is a six-bus cycle operation. There are two
"unlock" write cycles. These are followed by writing the
"set-up" command 80H. Two more "unlock" write cycles
are then followed by the chip erase command 10H.
The Automatic Chip Erase does not require the device
to be entirely pre-programmed prior to executing the
Automatic Chip Erase. Upon executing the Automatic
Chip Erase, the device will automatically program and
verify the entire memory for an all-zero data pattern.
When the device is automatically verified to contain an
all-zero pattern, a self-timed chip erase and verify begin.
The erase and verify operations are completed when the
data on Q7 is "1" at which time the device returns to the
Read mode. The system is not required to provide any
control or timing during these operations.
If program-fail or erase-fail happen, the write of F0H will
reset the device to abort the operation. A valid command
must then be written to place the device in the desired
state.
SILICON-ID-READ 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. PROM
programmers typically access signature codes by raising
A9 to a high voltage. However, multiplexing high voltage
onto address lines is not generally desired system
design practice.
When using the Automatic Chip Erase algorithm, note
that the erase automatically terminates when adequate
erase margin has been achieved for the memory array(no
erase verification command is required).
The MX29F4000 contains a Silicon-ID-Read operation to
supplement traditional PROM programming
methodology. The operation is initiated by writing the
read silicon ID command sequence into the command
register. Following the command write, a read cycle with
A1=VIL,A0=VIL retrieves the manufacturer code of C2H.
A read cycle with A1=VIL, A0=VIH returns the device
code of 99H for MX29F4000.
If the Erase operation was unsuccessful, the data on Q5
is "1"(see Table 4), indicating the erase operation exceed
internal timing limit.
The automatic erase begins on the rising edge of the last
WE or CE, whichever happeds first pulse in the command
sequence and terminates when the data on Q7 is "1" and
the data on Q6 stops toggling for two consecutive read
cycles, at which time the device returns to the Read
mode.
TABLE 3. EXPANDED SILICON ID CODE
Pins
A0
A1
Q7
Q6
Q5
Q4
Q3
Q2
Q1
Q0
Code(Hex)
Manufacture code
VIL
VIL
1
1
0
0
0
0
1
0
C2H
Device code for MX29F4000
VIH
VIL
1
0
1
0
0
0
1
1
99H
Sector Protection Verification
X
VIH
0
0
0
0
0
0
0
1
01H(Protected)
X
VIH
0
0
0
0
0
0
0
0
00H(Unprotected)
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MX29F4000
SECTOR ERASE COMMANDS
memory array (no erase verification command is
required). Sector erase is a six-bus cycle operation.
There are two "unlock" write cycles. These are
followed by writing the set-up command 80H. Two
more "unlock" write cycles are then followed by the
sector erase command 30H. The sector address is
latched on the falling edge of WE or CE, whichever
happeds later, while the command(data) is latched on
the rising edge of WE or CE, whichever happeds first.
Sector addresses selected are loaded into internal
register on the sixth falling edge of WE or CE,
whichever happeds later. Each successive sector load
cycle started by the falling edge of WE or CE,
whichever happeds later must begin within 30us from
the rising edge of the preceding WE or CE, whichever
happeds first. Otherwise, the loading period ends and
internal auto sector erase cycle starts. (Monitor Q3 to
determine if the sector erase timer window is still
open, see section Q3, Sector Erase Timer.) Any
command other than Sector Erase(30H) or Erase
Suspend(B0H) during the time-out period resets the
device to read mode.
The Automatic Sector Erase does not require the
device to be entirely pre-programmed prior to
executing the Automatic Set-up Sector Erase
command and Automatic Sector Erase command.
Upon executing the Automatic Sector Erase
command, the device will automatically program and
verify the sector(s) memory for an all-zero data
pattern. The system is not required to provide any
control or timing during these operations.
When the sector(s) is automatically verified to contain
an all-zero pattern, a self-timed sector erase and
verify begin. The erase and verify operations are
complete when the data on Q7 is "1" and the data on
Q6 stops toggling for two consecutive read cycles, at
which time the device returns to the Read mode. The
system is not required to provide any control or timing
during these operations.
When using the Automatic Sector Erase algorithm,
note that the erase automatically terminates when
adequate erase margin has been achieved for the
Table 4. Write Operation Status
Status
Q7
Q6
Note1
Byte Program in Auto Program Algorithm
Auto Erase Algorithm
Erase Suspend Read
In Progress
Erase Suspend Read
Q3
Q2
N/A
No Toggle
Note2
Q7
Toggle
0
0
Toggle
0
1
Toggle
1
No
0
N/A
Toggle
(Erase Suspended Sector)
Erase Suspended Mode
Q5
Toggle
Data
Data
Data
Data
Data
Q7
Toggle
0
N/A
N/A
Q7
Toggle
1
N/A
No Toggle
0
Toggle
1
1
Toggle
Q7
Toggle
1
N/A
N/A
(Non-Erase Suspended Sector)
Erase Suspend Program
Byte Program in Auto Program Algorithm
Exceeded
Auto Erase Algorithm
Time Limits Erase Suspend Program
Note:
1. Q7 and Q2 require a valid address when reading status information. Refer to the appropriate subsection for further
details.
2. Q5 switches to '1' when an Auto Program or Auto Erase operation has exceeded the maximum timing limits.
See "Q5:Exceeded Timing Limits " for more information.
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MX29F4000
ERASE SUSPEND
If the program opetation was unsuccessful, the data on
Q5 is "1"(see Table 4), indicating the program operation
exceed internal timing limit. The automatic programming
operation is completed when the data read on Q6 stops
toggling for two consecutive read cycles and the data on
Q7 and Q6 are equivalent to data written to these two
bits, at which time the device returns to the Read
mode(no program verify command is required).
This command only has meaning while the state machine
is executing Automatic Sector Erase operation, and
therefore will only be responded during Automatic Sector
Erase operation. However, When the Erase Suspend
command is written during the sector erase time-out, the
device immediately terminates the time-out period and
suspends the erase operation. After this command has
been executed, the command register will initiate erase
suspend mode. The state machine will return to read
mode automatically after suspend is ready. At this time,
state machine only allows the command register to
respond to the Read Memory Array, Erase Resume and
program commands.
DATA POLLING-Q7
The MX29F4000 also features Data Polling as a method
to indicate to the host system that the Automatic Program
or Erase algorithms are either in progress or completed.
While the Automatic Programming algorithm is in
operation, an attempt to read the device will produce the
complement data of the data last written to Q7. Upon
completion of the Automatic Program Algorithm an
attempt to read the device will produce the true data last
written to Q7. The Data Polling feature is valid after the
rising edge of the fourth WE or CE, whichever happeds
first pulse of the four write pulse sequences for automatic
program.
The system can determine the status of the program
operation using the Q7 or Q6 status bits, just as in the
standard program operation. After an erase-suspend
program operation is complete, the system can once
again read array data within non-suspended sectors.
ERASE RESUME
This command will cause the command register to clear
the suspend state and return back to Sector Erase mode
but only if an Erase Suspend command was previously
issued. Erase Resume will not have any effect in all
other conditions.Another Erase Suspend command can
be written after the chip has resumed erasing.
While the Automatic Erase algorithm is in operation, Q7
will read "0" until the erase operation is competed. Upon
completion of the erase operation, the data on Q7 will
read "1". The Data Polling feature is valid after the rising
edge of the sixth WE or CE, whichever happeds first
pulse of six write pulse sequences for automatic chip/
sector erase.
SET-UP AUTOMATIC PROGRAM
COMMANDS
The Data Polling feature is active during Automatic
Program/Erase algorithm or sector erase time-out.(see
section Q3 Sector Erase Timer)
To initiate Automatic Program mode, A three-cycle
command sequence is required. There are two "unlock"
write cycles. These are followed by writing the Automatic
Program command A0H.
Once the Automatic Program command is initiated, the
next WE or CE pulse causes a transition to an active
programming operation. Addresses are latched on the
falling edge, and data are internally latched on the rising
edge of the WE or CE, whichever happeds first pulse.
The rising edge of WE or CE, whichever happeds first
also begins the programming operation. The system is
not required to provide further controls or timings. The
device will automatically provide an adequate internally
generated program pulse and verify margin.
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MX29F4000
Q6:Toggle BIT I
Q2 toggles when the system reads at addresses within
those sectors that have been selected for erasure. (The
system may use either OE or CE to control the read
cycles.) But Q2 cannot distinguish whether the sector is
actively erasing or is erase-suspended. Q6, by
comparison, indicates whether the device is actively
erasing, or is in Erase Suspend, but cannot distinguish
which sectors are selected for erasure. Thus, both
status bits are required for sectors and mode information.
Refer to Table 4 to compare outputs for Q2 and Q6.
Toggle Bit I on Q6 indicates whether an Automatic
Program or Erase algorithm is in progress or complete,
or whether the device has entered the Erase Suspend
mode. Toggle Bit I may be read at any address, and is
valid after the rising edge of the final WE or CE, whichever
happeds first pulse in the command sequence(prior to the
program or erase operation), and during the sector timeout.
During an Automatic Program or Erase algorithm
operation, successive read cycles to any address cause
Q6 to toggle. The system may use either OE or CE to
control the read cycles. When the operation is complete,
Q6 stops toggling.
Reading Toggle Bits Q6/ Q2
Whenever the system initially begins reading toggle bit
status, it must read Q7-Q0 at least twice in a row to
determine whether a toggle bit is toggling. Typically, the
system would note and store the value of the toggle bit
after the first read. After the second read, the system
would compare the new value of the toggle bit with the
first. If the toggle bit is not toggling, the device has
completed the program or erase operation. The system
can read array data on Q7-Q0 on the following read
cycle.
After an erase command sequence is written, if all
sectors selected for erasing are protected, Q6 toggles
and returns to reading array data. If not all selected
sectors are protected, the Automatic Erase algorithm
erases the unprotected sectors, and ignores the selected
sectors that are protected.
The system can use Q6 and Q2 together to determine
whether a sector is actively erasing or is erase suspended.
When the device is actively erasing (that is, the Automatic
Erase algorithm is in progress), Q6 toggling. When the
device enters the Erase Suspend mode, Q6 stops
toggling. However, the system must also use Q2 to
determine which sectors are erasing or erase-suspended.
Alternatively, the system can use Q7.
However, if after the initial two read cycles, the system
determines that the toggle bit is still toggling, the system
also should note whether the value of Q5 is high (see the
section on Q5). If it is, the system should then determine
again whether the toggle bit is toggling, since the toggle
bit may have stopped toggling just as Q5 went high. If
the toggle bit is no longer toggling, the device has
successfuly completed the program or erase operation.
If it is still toggling, the device did not complete the
operation successfully, and the system must write the
reset command to return to reading array data.
If a program address falls within a protected sector, Q6
toggles for approximately 2us after the program command
sequence is written, then returns to reading array data.
The remaining scenario is that system initially determines
that the toggle bit is toggling and Q5 has not gone high.
The system may continue to monitor the toggle bit and
Q5 through successive read cycles, determining the
status as described in the previous paragraph.
Alternatively, it may choose to perform other system
tasks. In this case, the system must start at the beginning
of the algorithm when it returns to determine the status
of the operation.
Q6 also toggles during the erase-suspend-program
mode, and stops toggling once the Automatic Program
algorithm is complete.
Table 4 shows the outputs for Toggle Bit I on Q6.
Q2:Toggle Bit II
The "Toggle Bit II" on Q2, when used with Q6, indicates
whether a particular sector is actively eraseing (that is,
the Automatic Erase alorithm is in process), or whether
that sector is erase-suspended. Toggle Bit I is valid after
the rising edge of the final WE or CE, whichever happeds
first pulse in the command sequence.
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MX29F4000
with its control register architecture, alteration of the
memory contents only occurs after successful completion
of specific command sequences. The device also
incorporates several features to prevent inadvertent
write cycles resulting from VCC power-up and powerdown transition or system noise.
Q5
Exceeded Timing Limits
Q5 will indicate if the program or erase time has exceeded
the specified limits(internal pulse count). Under these
conditions Q5 will produce a "1". This time-out condition
indicates that the program or erase cycle was not
successfully completed. Data Polling and Toggle Bit are
the only operating functions of the device under this
condition.
Q3
Sector Erase Timer
After the completion of the initial sector erase command
sequence, the sector erase time-out will begin. Q3 will
remain low until the time-out is complete. Data Polling
and Toggle Bit are valid after the initial sector erase
command sequence.
If this time-out condition occurs during sector erase
operation, it specifies that a particular sector is bad and
it may not be reused. However, other sectors are still
functional and may be used for the program or erase
operation. The device must be reset to use other
sectors. Write the Reset command sequence to the
device, and then execute program or erase command
sequence. This allows the system to continue to use the
other active sectors in the device.
If Data Polling or the Toggle Bit indicates the device has
been written with a valid erase command, Q3 may be
used to determine if the sector erase timer window is still
open. If Q3 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 Data Polling or
Toggle Bit. If Q3 is low ("0"), the device will accept
additional sector erase commands. To insure the
command has been accepted, the system software
should check the status of Q3 prior to and following each
subsequent sector erase command. If Q3 were high on
the second status check, the command may not have
been accepted.
If this time-out condition occurs during the chip erase
operation, it specifies that the entire chip is bad or
combination of sectors are bad.
If this time-out condition occurs during the byte
programming operation, it specifies that the entire sector
containing that byte is bad and this sector maynot be
reused, (other sectors are still functional and can be
reused).
WRITE PULSE "GLITCH" PROTECTION
The time-out condition may also appear if a user tries to
program a non blank location without erasing. In this
case the device locks out and never completes the
Automatic Algorithm operation. Hence, the system
never reads a valid data on Q7 bit and Q6 never stops
toggling. Once the Device has exceeded timing limits,
the Q5 bit will indicate a "1". Please note that this is not
a device failure condition since the device was incorrectly
used.
Noise pulses of less than 5ns(typical) on CE or WE will
not initiate a write cycle.
LOGICAL INHIBIT
Writing is inhibited by holding any one of OE = VIL, CE
= VIH or WE = VIH. To initiate a write cycle CE and WE
must be a logical zero while OE is a logical one.
DATA PROTECTION
POWER SUPPLY DECOUPLING
The MX29F4000 is designed to offer protection against
accidental erasure or programming caused by spurious
system level signals that may exist during power
transition. During power up the device automatically
resets the state machine in the Read mode. In addition,
In order to reduce power switching effect, each device
should have a 0.1uF ceramic capacitor connected
between its VCC and GND.
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MX29F4000
SECTOR PROTECTION WITH 12V SYSTEM
It is also possible to determine if the chip is unprotected
in the system by writing the Read Silicon ID command.
Performing a read operation with A1=VIH, it will produce
00H at data outputs(Q0-Q7) for an unprotected sector.
It is noted that all sectors are unprotected after the chip
unprotect algorithm is completed.
The MX29F4000 features sector protection. This feature
will disable both program and erase operations for these
sectors protected. To activate this mode, the
programming equipment must force VID on address pin
A9 and control pin OE, (suggest VID = 12V) A6 = VIL and
CE = VIL.(see Table 2) Programming of the protection
circuitry begins on the falling edge of the WE or CE,
whichever happeds later pulse and is terminated on the
rising edge. Please refer to sector protect algorithm and
waveform.
POWER-UP SEQUENCE
The MX29F4000 powers up in the Read only mode. In
addition, the memory contents may only be altered after
successful completion of the predefined command
sequences.
To verify programming of the protection circuitry, the
programming equipment must force VID on address pin
A9 ( with CE and OE at VIL and WE at VIH). When A1=1,
it will produce a logical "1" code at device output Q0 for
a protected sector. Otherwise the device will produce
00H for the unprotected sector. In this mode, the
addresses, except for A1, are don't care. Address
locations with A1 = VIL are reserved to read manufacturer
and device codes.(Read Silicon ID)
SECTOR PROTECTION WITHOUT 12V
SYSTEM
The MX29F4000 also feature a sector protection method
in a system without 12V power suppply. The programming
equipment do not need to supply 12 volts to protect
sectors. The details are shown in sector protect algorithm
and waveform.
It is also possible to determine if the sector is protected
in the system by writing a Read Silicon ID command.
Performing a read operation with A1=VIH, it will produce
a logical "1" at Q0 for the protected sector.
CHIP UNPROTECT WITHOUT 12V SYSTEM
CHIP UNPROTECT WITH 12V SYSTEM
The MX29F4000 also feature a chip unprotection method
in a system without 12V power supply. The programming
equipment do not need to supply 12 volts to unprotect all
sectors. The details are shown in chip unprotect algorithm
and waveform.
The MX29F4000 also features the chip unprotect mode,
so that all sectors are unprotected after chip unprotect
is completed to incorporate any changes in the code. It
is recommended to protect all sectors before activating
chip unprotect mode.
To activate this mode, the programming equipment
must force VID on control pin OE and address pin A9.
The CE pins must be set at VIL. Pins A6 must be set to
VIH.(see Table 2) Refer to chip unprotect algorithm and
waveform for the chip unprotect algorithm. The
unprotection mechanism begins on the falling edge of
the WE or CE, whichever happeds later, pulse and is
terminated on the rising edge.
P/N:PM0629
REV. 1.0, DEC. 20, 1999
12
MX29F4000
CAPACITANCE (TA = 25oC, f = 1.0 MHz)
SYMBOL
PARAMETER
CIN1
MIN.
TYP
MAX.
UNIT
CONDITIONS
Input Capacitance
8
pF
VIN = 0V
CIN2
Control Pin Capacitance
12
pF
VIN = 0V
COUT
Output Capacitance
12
pF
VOUT = 0V
READ OPERATION
DC CHARACTERISTICS (TA = 0° C TO 70° C, VCC = 5V±10%)
SYMBOL
PARAMETER
MIN.
TYP
MAX.
UNIT
CONDITIONS
ILI
Input Leakage Current
1
uA
VIN = GND to VCC
ILO
Output Leakage Current
10
uA
VOUT = GND to VCC
ISB1
Standby VCC current
1
mA
CE = VIH
5
uA
CE = VCC + 0.3V
ISB2
1
ICC1
Operating VCC current
ICC2
30
mA
IOUT = 0mA, f=5MH
50
mA
IOUT = 0mA, f=10MHz
VIL
Input Low Voltage
-0.3(NOTE 1)
0.8
V
VIH
Input High Voltage
2.0
VCC + 0.3
V
0.45
VOL
Output Low Voltage
V
IOL = 2.1mA
VOH1
Output High Voltage(TTL)
2.4
V
IOH = -2mA
VOH2
Output High Voltage(CMOS)
VCC-0.4
V
IOH = -100uA,VCC=VCC MIN
NOTES:
1. VIL min. = -1.0V for pulse width is equal to or less than 50 ns. 2. VIH max. = VCC + 1.5V for pulse width is equal to or less
VIL min. = -2.0V for pulse width is equal to or less than 20 ns.
than 20 ns.
If VIH is over the specified maximum value, read operation
cannot be guaranteed.
±10%)
AC CHARACTERISTICS (TA = 0oC to 70oC, VCC = 5V±
29F4000-55(note2) 29F4000-70
Symbol PARAMETER
MIN.
MAX.
29F4000-90
29F4000-12
MIN. MAX. MIN. MAX. MIN. MAX. Unit
Conditions
tACC
Address to Output Delay
55
70
90
120
ns
CE=OE=VIL
tCE
CE to Output Delay
55
70
90
120
ns
OE=VIL
tOE
OE to Output Delay
30
40
40
50
ns
CE=VIL
tDF
OE High to Output Float (Note1) 0
30
40
ns
CE=VIL
tOH
Address to Output hold
ns
CE=OE=VIL
0
0
30
0
0
0
40
0
0
TEST CONDITIONS:
NOTE:
• Input pulse levels: 0.45V/2.4V
1. tDF is defined as the time at which the output achieves the
• Input rise and fall times is equal to or less than 0ns
open circuit condition and data is no longer driven.
• Output load: 1 TTL gate + 100pF (Including scope and jig)
2.Under condition of VCC=5V±10%,CL=50pF,VIH/VIL=3.0/
• Reference levels for measuring timing: 0.8V, 2.0V
0V,VOH/VOL=1.5/1.5V,IOL=2mA,IOH=-2mA.
P/N:PM0629
REV. 1.0, DEC. 20, 1999
13
MX29F4000
ABSOLUTE MAXIMUM RATINGS
RATING
VALUE
Ambient Operating Temperature
0oC to 70oC
Storage Temperature
-65oC to 125oC
Applied Input Voltage
-0.5V to 7.0V
Applied Output Voltage
-0.5V to 7.0V
VCC to Ground Potential
-0.5V to 7.0V
A9 & OE
-0.5V to 13.5V
NOTICE:
Stresses greater than those listed under ABSOLUTE
MAXIMUM RATINGS may cause permanent damage to
the device. This is a stress rating only and functional
operational sections of this specification is not implied.
Exposure to absolute maximum rating conditions for
extended period may affect reliability.
NOTICE:
Specifications contained within the following tables are
subject to change.
READ TIMING WAVEFORMS
VIH
ADD Valid
Addresses
VIL
tCE
VIH
CE
VIL
WE
VIH
VIL
OE
VIH
tACC
VIL
Outputs
tDF
tOE
VOH
tOH
HIGH Z
HIGH Z
DATA Valid
VOL
COMMAND PROGRAMMING/DATA PROGRAMMING/ERASE OPERATION
±10%)
DC CHARACTERISTICS (TA = 0oC to 70oC, VCC = 5V±
SYMBOL
PARAMETER
ICC1 (Read)
Operating VCC Current
MIN.
TYP
MAX.
UNIT
CONDITIONS
30
mA
IOUT=0mA, f=5MHz
ICC2
50
mA
IOUT=0mA, F=10MHz
ICC3 (Program)
50
mA
In Programming
ICC4 (Erase)
50
mA
In Erase
mA
CE=VIH, Erase Suspended
ICCES
VCC Erase Suspend Current
2
NOTES:
1. VIL min. = -0.6V for pulse width is equal to or less than
3. ICCES is specified with the device de-selected. If the
20ns.
device is read during erase suspend mode, current draw is
2. If VIH is over the specified maximum value, programming
the sum of ICCES and ICC1 or ICC2.
operation cannot be guranteed.
4. All current are in RMS unless otherwise noted.
P/N:PM0629
REV. 1.0, DEC. 20, 1999
14
MX29F4000
AC CHARACTERISTICS TA = 0oC to 70oC, VCC = 5V ± 10%
29F4000-55(Note2) 29F4000-70
SYMBOL PARAMETER
MIN.
MAX. MIN.
29F4000-90
MAX. MIN.
MAX.
29F4000-12
MIN.
MAX. Unit
tOES
OE setup time
50
50
50
50
ns
tCWC
Command programming cycle
70
70
90
120
ns
tCEP
WE programming pulse width
45
45
45
50
ns
tCEPH1
WE programming pluse width High
20
20
20
20
ns
tCEPH2
WE programming pluse width High
20
20
20
20
ns
tAS
Address setup time
0
0
0
0
ns
tAH
Address hold time
45
45
45
50
ns
tDS
Data setup time
30
30
45
50
ns
tDH
Data hold time
0
0
0
0
ns
tCESC
CE setup time before command write
0
0
0
0
ns
tDF
Output disable time (Note 1)
tAETC
Total erase time in auto chip erase
4(TYP.)
tAETB
Total erase time in auto sector erase
1.3(TYP.)10.4
tAVT
Total programming time in auto verify
7
tBAL
Sector address load time
100
100
100
100
us
tCH
CE Hold Time
0
0
0
0
ns
30
32
210
30
40
40
32
4(TYP.) 32
4(TYP.) 32
s
1.3(TYP.) 10.4
1.3(TYP.)10.4
1.3(TYP.)10.4
s
7
7
7
us
4(TYP.)
210
210
210
ns
tCS
CE setup to WE going low
0
0
0
0
ns
tVLHT
Voltge Transition Time
4
4
4
4
us
tOESP
OE Setup Time to WE Active
4
4
4
4
us
tWPP1
Write pulse width for sector protect
10
10
10
10
us
tWPP2
Write pulse width for sector unprotect
12
12
12
12
ms
NOTES:
1. tDF defined as the time at which the output achieves the open circuit condition and data is no longer driven.
2.Under conditions of VCC=5V±10%,CL=50pF,VIH/VIL=3.0/0V,VOL/VOH=1.5/1.5, IOL=2mA,IOH=-2mA.
P/N:PM0629
REV. 1.0, DEC. 20, 1999
15
MX29F4000
SWITCHING TEST CIRCUITS
1.6K ohm
DEVICE UNDER
+5V
TEST
CL
1.2K ohm
DIODES=IN3064
OR EQUIVALENT
CL=100pF Including jig capacitance
CL= 50pF for 29F4000-55
SWITCHING TEST WAVEFORMS
2.4V
2.0V
2.0V
TEST POINTS
0.8V
0.8V
0.45V
INPUT
OUTPUT
AC TESTING: Inputs are driven at 2.4V for a logic "1" and 0.45V for a logic "0".
Input pulse rise and fall times are < 20ns.(5ns for 29F4000-55)
Note:VIH/VIL=3.0/0V,VOH/VOL=1.5/1.5V for 29F4000-55
COMMAND WRITE TIMING WAVEFORM
VCC
Addresses
5V
VIH
ADD Valid
VIL
tAH
tAS
WE
VIH
VIL
tOES
tCEPH1
tCEP
tCWC
CE
VIH
VIL
tCS
OE
tCH
VIH
VIL
tDS
tDH
VIH
Data
DIN
VIL
P/N:PM0629
REV. 1.0, DEC. 20, 1999
16
MX29F4000
AUTOMATIC PROGRAMMING TIMING WAVEFORM
bit checking after automatic verification starts. Device
outputs DATA during programming and DATA after
programming on Q7.(Q6 is for toggle bit; see toggle bit,
DATA polling, timing waveform)
One byte data is programmed. Verify in fast algorithm
and additional programming by external control are not
required because these operations are executed
automatically by internal control circuit. Programming
completion can be verified by DATA polling and toggle
AUTOMATIC PROGRAMMING TIMING WAVEFORM
Vcc 5V
A11~A18
A0~A10
ADD Valid
2AAH
555H
tAS
WE
ADD Valid
555H
tCWC
tAH
tCEPH1
tCESC
tAVT
CE
tCEP
OE
tDS
Q0,Q1,Q2
tDH
Command In
tDF
Command In
Command In
DATA
Data In
DATA polling
Q4(Note 1)
Q7
Command In
Command #AAH
Command In
Command In
Command #55H
Command #A0H
DATA
Data In
DATA
tOE
(Q0~Q7)
Notes:
(1). Q6:Toggle bit, Q5:Timing-limit bit, Q3: Time-out bit
P/N:PM0629
REV. 1.0, DEC. 20, 1999
17
MX29F4000
AUTOMATIC PROGRAMMING ALGORITHM FLOWCHART
START
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data A0H Address 555H
Write Program Data/Address
Toggle Bit Checking
Q6 not Toggled
NO
YES
Invalid
Command
NO
Verify Byte Ok
YES
NO
Q5 = 1
Auto Program Completed
YES
Reset
Auto Program Exceed
Timing Limit
P/N:PM0629
REV. 1.0, DEC. 20, 1999
18
MX29F4000
AUTOMATIC CHIP ERASE TIMING WAVEFORM
All data in chip are erased. External erase verification is
not required because data is erased automatically by
internal control circuit. Erasure completion can be
verified by DATA polling and toggle bit checking after
automatic erase starts. Device outputs 0 during erasure
and 1 after erasure on Q7.(Q6 is for toggle bit; see toggle
bit, DATA polling, timing waveform)
AUTOMATIC CHIP ERASE TIMING WAVEFORM
Vcc 5V
A11~A18
A0~A10
2AAH
555H
555H
555H
tAS
WE
2AAH
555H
tCWC
tAH
tCEPH1
tAETC
CE
tCEP
OE
tDS tDH
Q0,Q1,
Command In
Command In
Command In
Command In
Command In
Command In
Q4(Note 1)
Q7
DATA polling
Command In
Command In
Command In
Command In
Command In
Command In
Command #AAH
Command #55H
Command #80H
Command #AAH
Command #55H
Command #10H
(Q0~Q7)
Notes:
(1). Q6:Toggle bit, Q5:Timing-limit bit, Q3: Time-out bit, Q2: Toggle bit
P/N:PM0629
REV. 1.0, DEC. 20, 1999
19
MX29F4000
AUTOMATIC CHIP ERASE ALGORITHM FLOWCHART
START
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data 80H Address 555H
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data 10H Address 555H
NO
Toggle Bit Checking
Q6 not Toggled
YES
Invalid
Command
NO
DATA Polling
Q7 = 1
YES
NO
Auto Chip Erase Completed
Q5 = 1
Reset
Auto Chip Erase Exceed
Timing Limit
P/N:PM0629
REV. 1.0, DEC. 20, 1999
20
MX29F4000
AUTOMATIC SECTOR ERASE TIMING WAVEFORM
checking after automatic erase starts. Device outputs 0
during erasure and 1 after erasure on Q7.(Q6 is for
toggle bit; see toggle bit, DATA polling, timing waveform)
Sector data indicated by A16 to A18 are erased. External
erase verify is not required because data are erased
automatically by internal control circuit. Erasure completion can be verified by DATA polling and toggle bit
AUTOMATIC SECTOR ERASE TIMING WAVEFORM
Vcc 5V
Sector
Address0
A16-A18
A0~A10
555H
2AAH
555H
555H
Sector
Address1
Sector
Addressn
2AAH
tAS
tCWC
tAH
WE
tCEPH1
tBAL
tAETB
CE
tCEP
OE
tDS tDH
Q0,Q1,
Command
In
Command
In
Command
In
Command
In
Command
In
Command
In
Command
In
Command
In
Q4(Note 1)
Q7
DATA polling
Command
In
Command
In
Command
In
Command
In
Command
In
Command
In
Command #AAH Command #55H Command #80H Command #AAH Command #55H Command #30H
(Q0~Q7)
Command
In
Command #30H
Command
In
Command #30H
Notes:
(1). Q6:Toggle bit, Q5:Timing-limit bit, Q3: Time-out bit, Q2: Toggle bit
P/N:PM0629
REV. 1.0, DEC. 20, 1999
21
MX29F4000
AUTOMATIC SECTOR ERASE ALGORITHM FLOWCHART
START
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data 80H Address 555H
Write Data AAH Address 555H
Write Data 55H Address 2AAH
Write Data 30H Sector Address
Toggle Bit Checking
Q6 Toggled ?
NO
Invalid Command
YES
Load Other Sector Addrss If Necessary
(Load Other Sector Address)
NO
Last Sector
to Erase
YES
Time-out Bit
Checking Q3=1 ?
NO
YES
Toggle Bit Checking
Q6 not Toggled
NO
YES
Q5 = 1
DATA Polling
Q7 = 1
Reset
Auto Sector Erase Completed
Auto Sector Erase Exceed
Timing Limit
P/N:PM0629
REV. 1.0, DEC. 20, 1999
22
MX29F4000
ERASE SUSPEND/ERASE RESUME FLOWCHART
START
Write Data B0H
NO
Toggle Bit checking Q6
not toggled
YES
Read Array or
Program
Reading or
Programming End
NO
YES
Write Data 30H
Continue Erase
Another
Erase Suspend ?
NO
YES
P/N:PM0629
REV. 1.0, DEC. 20, 1999
23
MX29F4000
TIMING WAVEFORM FOR SECTOR PROTECTION FOR SYSTEM WITH 12V
A1
A6
12V
5V
A9
tVLHT
Verify
12V
5V
OE
tVLHT
tVLHT
tWPP 1
WE
tOESP
CE
Data
01H
F0H
tOE
A18-A16
Sector Address
P/N:PM0629
REV. 1.0, DEC. 20, 1999
24
MX29F4000
TIMING WAVEFORM FOR CHIP UNPROTECTION FOR SYSTEM WITH 12V
A1
12V
5V
A9
tVLHT
A6
Verify
12V
5V
OE
tVLHT
tVLHT
tWPP 2
WE
tOESP
CE
Data
00H
F0H
tOE
P/N:PM0629
REV. 1.0, DEC. 20, 1999
25
MX29F4000
SECTOR PROTECTION ALGORITHM FOR SYSTEM WITH 12V
START
Set Up Sector Addr
(A18, A17, A16)
PLSCNT=1
OE=VID,A9=VID,CE=VIL
A6=VIL
Activate WE Pulse
Time Out 10us
Set WE=VIH, CE=OE=VIL
A9 should remain VID
Read from Sector
Addr=SA, A1=1
No
PLSCNT=32?
.
No
Data=01H?
Yes
Device Failed
Protect Another
Sector?
Yes
Remove VID from A9
Write Reset Command
Sector Protection
Complete
P/N:PM0629
REV. 1.0, DEC. 20, 1999
26
MX29F4000
CHIP UNPROTECTION ALGORITHM FOR SYSTEM WITH 12V
START
Protect All Sectors
PLSCNT=1
Write "unlock for sector protect/unprotect"
Command (Table 1)
Set OE=A9=VIH
CE=VIL,A6=1
Activate WE Pulse to start
Data do'nt care
No
Toggle bit checking
Q6 not Toggled
Increment
PLSCNT
Yes
Set OE=CE=VIL
A9=VIH,A1=1
Set Up First Sector Addr
Read Data from Device
No
Data=00H?
Increment
No
PLSCNT=1000?
Sector Addr
Yes
No
All sectors have
been verified?
Yes
Device Failed
Yes
Write Reset Command
Chip Unprotect
Complete
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
P/N:PM0629
REV. 1.0, DEC. 20, 1999
27
MX29F4000
TIMING WAVEFORM FOR SECTOR PROTECTION FOR SYSTEM WITHOUT 12V
A1
A6
Toggle bit polling
Verify
5V
OE
tCEP
WE
* See the following Note!
CE
Data
Don't care
(Note 2)
01H
F0H
tOE
A18-A16
Sector Address
Note1: Must issue "unlock for sector protect/unprotect" command before sector protection
for a system without 12V provided.
Note2: Except F0H
P/N:PM0629
REV. 1.0, DEC. 20, 1999
28
MX29F4000
TIMING WAVEFORM FOR CHIP UNPROTECTION FOR SYSTEM WITHOUT 12V
A1
A6
Toggle bit polling
Verify
5V
OE
tCEP
WE
* See the following Note!
CE
Data
Don't care
(Note 2)
00H
F0H
tOE
Note1: Must issue "unlock for sector protect/unprotect" command before sector unprotection
for a system without 12V provided.
Note2: Except F0H
P/N:PM0629
REV. 1.0, DEC. 20, 1999
29
MX29F4000
SECTOR PROTECTION ALGORITHM FOR SYSTEM WITHOUT 12V
START
PLSCNT=1
Write "unlock for sector protect/unprotect"
Command(Table1)
Set Up Sector Addr
(A18, A17, A16)
OE=VIH,A9=VIH
CE=VIL,A6=VIL
Activate WE Pulse to start
Data don't care
Toggle bit checking
Q6 not Toggled
No
.
Yes
Increment PLSCNT
Set CE=OE=VIL
A9=VIH
Read from Sector
Addr=SA, A1=1
No
PLSCNT=32?
No
Data=01H?
Yes
Device Failed
Protect Another
Sector?
Yes
Write Reset Command
Sector Protection
Complete
P/N:PM0629
REV. 1.0, DEC. 20, 1999
30
MX29F4000
CHIP UNPROTECTION ALGORITHM FOR SYSTEM WITHOUT 12V
START
Protect All Sectors
PLSCNT=1
Set OE=A9=VID
CE=VIL,A6=1
Activate WE Pulse
Time Out 12ms
Increment
PLSCNT
Set OE=CE=VIL
A9=VID,A1=1
Set Up First Sector Addr
Read Data from Device
No
Data=00H?
Increment
Sector Addr
Yes
No
All sectors have
been verified?
No
PLSCNT=1000?
Yes
Device Failed
Yes
Remove VID from A9
Write Reset Command
Chip Unprotect
Complete
* It is recommended before unprotect whole chip, all sectors should be protected in advance.
P/N:PM0629
REV. 1.0, DEC. 20, 1999
31
MX29F4000
ID CODE READ TIMING WAVEFORM
VCC
5V
ADD
VID
VIH
A9
VIL
ADD
A0
VIH
A1
VIH
VIL
tACC
tACC
VIL
ADD
A2-A8
A10-A18
CE
VIH
VIL
VIH
VIL
WE
VIH
tCE
VIL
OE
VIH
tOE
VIL
tDF
tOH
tOH
VIH
DATA
Q0-Q7
DATA OUT
DATA OUT
VIL
99H
C2H
P/N:PM0629
REV. 1.0, DEC. 20, 1999
32
MX29F4000
ORDERING INFORMATION
PLASTIC PACKAGE
PART NO.
ACCESS TIME
OPERATING CURRENT
STANDBY CURRENT
(ns)
MAX.(mA)
MAX.(uA)
30
5
MX29F4000PC-55 55
PACKAGE
32 Pin PDIP
(EPROM pinout)
MX29F4000PC-70 70
30
5
32 Pin PDIP
(EPROM pinout)
MX29F4000PC-90 90
30
5
32 Pin PDIP
(EPROM pinout)
MX29F4000PC-12 120
30
5
32 Pin PDIP
(EPROM pinout)
P/N:PM0629
REV. 1.0, DEC. 20, 1999
33
MX29F4000
ERASE AND PROGRAMMING PERFORMANCE(1)
LIMITS
TYP.(2)
MAX.(3)
UNITS
1.3
10.4
sec
Chip Erase Time
4
32
sec
Byte Programming Time
7
210
us
Chip Programming Time
4
12
sec
PARAMETER
MIN.
Sector Erase Time
Erase/Program Cycles
Note:
100,000
Cycles
1.Not 100% Tested, Excludes external system level over head.
2.Typical values measured at 25°C,5V.
3.Maximunm values measured at 25°C,4.5V.
LATCHUP CHARACTERISTICS
MIN.
MAX.
Input Voltage with respect to GND on all pins except I/O pins
-1.0V
13.5V
Input Voltage with respect to GND on all I/O pins
-1.0V
Vcc + 1.0V
-100mA
+100mA
MIN.
UNIT
20
Years
Current
Includes all pins except Vcc. Test conditions: Vcc = 5.0V, one pin at a time.
DATA RETENTION
PARAMETER
Data Retention Time
P/N:PM0629
REV. 1.0, DEC. 20, 1999
34
MX29F4000
REVISION HISTORY
Revision
Description
Page
Date
1.0
1.To remove "Advanced Information" datasheet marking and
contain information on products in full production
2.The modification summary of Revision 0.1 & Revision 1.0:
2-1.Program/erase cycle times:10K cycles-->100K cycles
2-2.To add data retention 20 years
2-3.To modify timing of sector address loading period while
operating multi-sector erase from 80us to 30us
2-4.To modify tBAL from 80us to 100us
2-5.To remove A9 from "timing waveform for sector protection for
system without 12V"
To remove A9 from "timing waveform for chip unprotection for
system without 12V"
P1
DEC/20/1999
P/N:PM0629
P1,34
P1,34
P8
P15
P28
P29
REV. 1.0, DEC. 20, 1999
35
MX29F4000
MACRONIX INTERNATIONAL CO., LTD.
HEADQUARTERS:
TEL:+886-3-578-8888
FAX:+886-3-578-8887
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TEL:+32-2-456-8020
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TEL:+81-44-246-9100
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FAX:+1-847-963-1909
http : //www.macronix.com
MACRONIX INTERNATIONAL CO., LTD. reserves the rignt to change product and specifications without notice.
36