64 Mbit (x16) Multi-Purpose Flash Plus
SST39VF6401 / SST39VF6402
SST39VF160x / 320x / 640x2.7V 16Mb / 32Mb / 64Mb (x16) MPF+ memories
EOL Data Sheet
FEATURES:
• Organized as 4M x16: SST39VF6401/6402
• Single Voltage Read and Write Operations
– 2.7-3.6V
• Superior Reliability
– Endurance: 100,000 Cycles (Typical)
– Greater than 100 years Data Retention
• Low Power Consumption (typical values at 5 MHz)
– Active Current: 9 mA (typical)
– Standby Current: 3 µA (typical)
– Auto Low Power Mode: 3 µA (typical)
• Hardware Block-Protection/WP# Input Pin
– Top Block-Protection (top 32 KWord)
for SST39VF6402
– Bottom Block-Protection (bottom 32 KWord)
for SST39VF6401
• Sector-Erase Capability
– Uniform 2 KWord sectors
• Block-Erase Capability
– Uniform 32 KWord blocks
• Chip-Erase Capability
• Erase-Suspend/Erase-Resume Capabilities
• Hardware Reset Pin (RST#)
• Security-ID Feature
– SST: 128 bits; User: 128 bits
• Fast Read Access Time:
– 70 ns
• Latched Address and Data
• Fast Erase and Word-Program:
– Sector-Erase Time: 18 ms (typical)
– Block-Erase Time: 18 ms (typical)
– Chip-Erase Time: 40 ms (typical)
– Word-Program Time: 7 µs (typical)
• Automatic Write Timing
– Internal V
PP
Generation
• End-of-Write Detection
– Toggle Bits
– Data# Polling
• CMOS I/O Compatibility
• JEDEC Standard
– Flash EEPROM Pinouts and command sets
• Packages Available
– 48-lead TSOP (12mm x 20mm)
– 48-ball TFBGA (8mm x 10mm)
• All non-Pb (lead-free) devices are RoHS compliant
PRODUCT DESCRIPTION
The SST39VF6401 and SST39VF6402 devices are 4M
x16 respectively, CMOS Multi-Purpose Flash Plus
(MPF+) manufactured with SST’s proprietary, high perfor-
mance CMOS SuperFlash technology. The split-gate cell
design and thick-oxide tunneling injector attain better reli-
ability and manufacturability compared with alternate
approaches. The SST39VF640x write (Program or
Erase) with a 2.7-3.6V power supply. These devices con-
form to JEDEC standard pinouts for x16 memories.
Featuring high performance Word-Program, the
SST39VF640x devices provide a typical Word-Program
time of 7 µsec. These devices use Toggle Bit or Data# Poll-
ing to indicate the completion of Program operation. To pro-
tect against inadvertent write, they have on-chip hardware
and Software Data Protection schemes. Designed, manu-
factured, and tested for a wide spectrum of applications,
these devices are offered with a guaranteed typical endur-
ance of 100,000 cycles. Data retention is rated at greater
than 100 years.
The SST39VF640x devices are suited for applications that
require convenient and economical updating of program,
configuration, or data memory. For all system applications,
they significantly improve performance and reliability, while
lowering power consumption. They inherently use less
energy during Erase and Program than alternative flash
technologies. The total energy consumed is a function of
the applied voltage, current, and time of application. Since
for any given voltage range, the SuperFlash technology
uses less current to program and has a shorter erase time,
the total energy consumed during any Erase or Program
operation is less than alternative flash technologies. These
devices also improve flexibility while lowering the cost for
program, data, and configuration storage applications.
The SuperFlash technology provides fixed Erase and Pro-
gram times, independent of the number of Erase/Program
cycles that have occurred. Therefore the system software
or hardware does not have to be modified or de-rated as is
necessary with alternative flash technologies, whose
Erase and Program times increase with accumulated
Erase/Program cycles.
©2008 Silicon Storage Technology, Inc.
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1
The SST logo and SuperFlash are registered trademarks of Silicon Storage Technology, Inc.
MPF is a trademark of Silicon Storage Technology, Inc.
These specifications are subject to change without notice.
16 Mbit / 32 Mbit Multi-Purpose Flash Plus
SST39VF6401 / SST39VF6402
EOL Data Sheet
To meet high density, surface mount requirements, the
SST39VF640x are offered in 48-lead TSOP and 48-ball
TFBGA packages. See Figures 2 and 3 for pin assign-
ments.
µs. See Figures 5 and 6 for WE# and CE# controlled Pro-
gram operation timing diagrams and Figure 20 for flow-
charts. During the Program operation, the only valid reads
are Data# Polling and Toggle Bit. During the internal Pro-
gram operation, the host is free to perform additional tasks.
Any commands issued during the internal Program opera-
tion are ignored. During the command sequence, WP#
should be statically held high or low.
Device Operation
Commands are used to initiate the memory operation func-
tions of the device. Commands are written to the device
using standard microprocessor write sequences. A com-
mand is written by asserting WE# low while keeping CE#
low. The address bus is latched on the falling edge of WE#
or CE#, whichever occurs last. The data bus is latched on
the rising edge of WE# or CE#, whichever occurs first.
The SST39VF640x also have the
Auto Low Power
mode
which puts the device in a near standby mode after data
has been accessed with a valid Read operation. This
reduces the I
DD
active read current from typically 9 mA to
typically 3 µA. The Auto Low Power mode reduces the typi-
cal I
DD
active read current to the range of 2 mA/MHz of
Read cycle time. The device exits the Auto Low Power
mode with any address transition or control signal transition
used to initiate another Read cycle, with no access time
penalty. Note that the device does not enter Auto-Low
Power mode after power-up with CE# held steadily low,
until the first address transition or CE# is driven high.
Sector/Block-Erase Operation
The Sector- (or Block-) Erase operation allows the system
to erase the device on a sector-by-sector (or block-by-
block) basis. The SST39VF640x offer both Sector-Erase
and Block-Erase mode. The sector architecture is based
on uniform sector size of 2 KWord. The Block-Erase mode
is based on uniform block size of 32 KWord. The Sector-
Erase operation is initiated by executing a six-byte com-
mand sequence with Sector-Erase command (30H) and
sector address (SA) in the last bus cycle. The Block-Erase
operation is initiated by executing a six-byte command
sequence with Block-Erase command (50H) and block
address (BA) in the last bus cycle. The sector or block
address is latched on the falling edge of the sixth WE#
pulse, while the command (30H or 50H) is latched on the
rising edge of the sixth WE# pulse. The internal Erase
operation begins after the sixth WE# pulse. The End-of-
Erase operation can be determined using either Data#
Polling or Toggle Bit methods. See Figures 10 and 11 for
timing waveforms and Figure 24 for the flowchart. Any
commands issued during the Sector- or Block-Erase oper-
ation are ignored. When WP# is low, any attempt to Sector-
(Block-) Erase the protected block will be ignored. During
the command sequence, WP# should be statically held
high or low.
Read
The Read operation of the SST39VF640x is controlled
by CE# and OE#, both have to be low for the system to
obtain data from the outputs. CE# is used for device
selection. When CE# is high, the chip is deselected and
only standby power is consumed. OE# is the output con-
trol and is used to gate data from the output pins. The
data bus is in high impedance state when either CE# or
OE# is high. Refer to the Read cycle timing diagram for
further details (Figure 4).
Erase-Suspend/Erase-Resume Commands
The Erase-Suspend operation temporarily suspends a
Sector- or Block-Erase operation thus allowing data to be
read from any memory location, or program data into any
sector/block that is not suspended for an Erase operation.
The operation is executed by issuing one byte command
sequence with Erase-Suspend command (B0H). The
device automatically enters read mode typically within 20
µs after the Erase-Suspend command had been issued.
Valid data can be read from any sector or block that is not
suspended from an Erase operation. Reading at address
location within erase-suspended sectors/blocks will output
DQ
2
toggling and DQ
6
at “1”. While in Erase-Suspend
mode, a Word-Program operation is allowed except for the
sector or block selected for Erase-Suspend.
Word-Program Operation
The SST39VF640x are programmed on a word-by-word
basis. Before programming, the sector where the word
exists must be fully erased. The Program operation is
accomplished in three steps. The first step is the three-byte
load sequence for Software Data Protection. The second
step is to load word address and word data. During the
Word-Program operation, the addresses are latched on the
falling edge of either CE# or WE#, whichever occurs last.
The data is latched on the rising edge of either CE# or
WE#, whichever occurs first. The third step is the internal
Program operation which is initiated after the rising edge of
the fourth WE# or CE#, whichever occurs first. The Pro-
gram operation, once initiated, will be completed within 10
©2008 Silicon Storage Technology, Inc.
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16 Mbit / 32 Mbit Multi-Purpose Flash Plus
SST39VF6401 / SST39VF6402
EOL Data Sheet
To resume Sector-Erase or Block-Erase operation which has
been suspended the system must issue Erase Resume
command. The operation is executed by issuing one byte
command sequence with Erase Resume command (30H)
at any address in the last Byte sequence.
completion of an internal Write operation, the remaining
data outputs may still be invalid: valid data on the entire
data bus will appear in subsequent successive Read
cycles after an interval of 1 µs. During internal Erase oper-
ation, any attempt to read DQ
7
will produce a ‘0’. Once the
internal Erase operation is completed, DQ
7
will produce a
‘1’. The Data# Polling is valid after the rising edge of fourth
WE# (or CE#) pulse for Program operation. For Sector-,
Block- or Chip-Erase, the Data# Polling is valid after the
rising edge of sixth WE# (or CE#) pulse. See Figure 7 for
Data# Polling timing diagram and Figure 21 for a flowchart.
Chip-Erase Operation
The SST39VF640x provide a Chip-Erase operation, which
allows the user to erase the entire memory array to the “1”
state. This is useful when the entire device must be quickly
erased.
The Chip-Erase operation is initiated by executing a six-
byte command sequence with Chip-Erase command
(10H) at address 5555H in the last byte sequence. The
Erase operation begins with the rising edge of the sixth
WE# or CE#, whichever occurs first. During the Erase
operation, the only valid read is Toggle Bit or Data# Polling.
See Table 6 for the command sequence, Figure 10 for tim-
ing diagram, and Figure 24 for the flowchart. Any com-
mands issued during the Chip-Erase operation are
ignored. When WP# is low, any attempt to Chip-Erase will
be ignored. During the command sequence, WP# should
be statically held high or low.
Toggle Bits (DQ6 and DQ2)
During the internal Program or Erase operation, any con-
secutive attempts to read DQ
6
will produce alternating “1”s
and “0”s, i.e., toggling between 1 and 0. When the internal
Program or Erase operation is completed, the DQ
6
bit will
stop toggling. The device is then ready for the next opera-
tion. For Sector-, Block-, or Chip-Erase, the toggle bit (DQ
6
)
is valid after the rising edge of sixth WE# (or CE#) pulse.
DQ
6
will be set to “1” if a Read operation is attempted on an
Erase-Suspended Sector/Block. If Program operation is ini-
tiated in a sector/block not selected in Erase-Suspend
mode, DQ
6
will toggle.
An additional Toggle Bit is available on DQ
2
, which can be
used in conjunction with DQ
6
to check whether a particular
sector is being actively erased or erase-suspended. Table 1
shows detailed status bits information. The Toggle Bit
(DQ
2
) is valid after the rising edge of the last WE# (or CE#)
pulse of Write operation. See Figure 8 for Toggle Bit timing
diagram and Figure 21 for a flowchart.
TABLE 1: Write Operation Status
Status
Normal
Standard
Operation Program
Standard
Erase
Erase-
Suspend
Mode
Read from
Erase-Suspended
Sector/Block
Read from
Non- Erase-Suspended
Sector/Block
Program
Write Operation Status Detection
The SST39VF640x provide two software means to detect
the completion of a Write (Program or Erase) cycle, in
order to optimize the system write cycle time. The software
detection includes two status bits: Data# Polling (DQ
7
) and
Toggle Bit (DQ
6
). The End-of-Write detection mode is
enabled after the rising edge of WE#, which initiates the
internal Program or Erase operation.
The actual completion of the nonvolatile write is asyn-
chronous with the system; therefore, either a Data# Poll-
ing or Toggle Bit read may be simultaneous with the
completion of the write cycle. If this occurs, the system
may possibly get an erroneous result, i.e., valid data may
appear to conflict with either DQ
7
or DQ
6
. In order to pre-
vent spurious rejection, if an erroneous result occurs, the
software routine should include a loop to read the
accessed location an additional two (2) times. If both
reads are valid, then the device has completed the Write
cycle, otherwise the rejection is valid.
DQ
7
DQ
7
#
0
1
DQ
6
Toggle
Toggle
1
DQ
2
No Toggle
Toggle
Toggle
Data
Data
Data
DQ
7
#
Toggle
N/A
T1.0 1223(03)
Data# Polling (DQ
7
)
When the SST39VF640x are in the internal Program oper-
ation, any attempt to read DQ
7
will produce the comple-
ment of the true data. Once the Program operation is
completed, DQ
7
will produce true data. Note that even
though DQ
7
may have valid data immediately following the
©2008 Silicon Storage Technology, Inc.
Note:
DQ
7
and DQ
2
require a valid address when reading
status information.
S71223(03)-00-EOL
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16 Mbit / 32 Mbit Multi-Purpose Flash Plus
SST39VF6401 / SST39VF6402
EOL Data Sheet
Data Protection
The SST39VF640x provide both hardware and software
features to protect nonvolatile data from inadvertent writes.
Hardware Reset (RST#)
The RST# pin provides a hardware method of resetting the
device to read array data. When the RST# pin is held low
for at least T
RP,
any in-progress operation will terminate and
return to Read mode. When no internal Program/Erase
operation is in progress, a minimum period of T
RHR
is
required after RST# is driven high before a valid Read can
take place (see Figure 16).
The Erase or Program operation that has been interrupted
needs to be reinitiated after the device resumes normal
operation mode to ensure data integrity.
Hardware Data Protection
Noise/Glitch Protection: A WE# or CE# pulse of less than 5
ns will not initiate a write cycle.
V
DD
Power Up/Down Detection: The Write operation is
inhibited when V
DD
is less than 1.5V.
Write Inhibit Mode: Forcing OE# low, CE# high, or WE#
high will inhibit the Write operation. This prevents inadvert-
ent writes during power-up or power-down.
Software Data Protection (SDP)
The SST39VF640x provide the JEDEC approved Software
Data Protection scheme for all data alteration operations,
i.e., Program and Erase. Any Program operation requires
the inclusion of the three-byte sequence. The three-byte
load sequence is used to initiate the Program operation,
providing optimal protection from inadvertent Write opera-
tions, e.g., during the system power-up or power-down.
Any Erase operation requires the inclusion of six-byte
sequence. These devices are shipped with the Software
Data Protection permanently enabled. See Table 6 for the
specific software command codes. During SDP command
sequence, invalid commands will abort the device to read
mode within T
RC.
The contents of DQ
15
-DQ
8
can be V
IL
or
V
IH
, but no other value, during any SDP command
sequence.
Hardware Block Protection
The SST39VF6402 support top hardware block protection,
which protects the top 32 KWord block of the device. The
SST39VF6401 support bottom hardware block protection,
which protects the bottom 32 KWord block of the device.
The Boot Block address ranges are described in Table 2.
Program and Erase operations are prevented on the 32
KWord when WP# is low. If WP# is left floating, it is inter-
nally held high via a pull-up resistor, and the Boot Block is
unprotected, enabling Program and Erase operations on
that block.
TABLE 2: Boot Block Address Ranges
Product
Bottom Boot Block
SST39VF6401
Top Boot Block
SST39VF6402
3F8000H-3FFFFFH
T2.0 1223(03)
Address Range
000000H-007FFFH
Common Flash Memory Interface (CFI)
The SST39VF640x also contain the CFI information to
describe the characteristics of the device. In order to enter
the CFI Query mode, the system must write three-byte
sequence, same as product ID entry command with 98H
(CFI Query command) to address 5555H in the last byte
sequence. Once the device enters the CFI Query mode,
the system can read CFI data at the addresses given in
Tables 7 through 9. The system must write the CFI Exit
command to return to Read mode from the CFI Query
mode.
©2008 Silicon Storage Technology, Inc.
S71223(03)-00-EOL
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4
16 Mbit / 32 Mbit Multi-Purpose Flash Plus
SST39VF6401 / SST39VF6402
EOL Data Sheet
Product Identification
The Product Identification mode identifies the devices as
the SST39VF6401 or SST39VF6402, and manufacturer
as SST. This mode may be accessed software opera-
tions. Users may use the Software Product Identification
operation to identify the part (i.e., using the device ID)
when using multiple manufacturers in the same socket.
For details, see Table 6 for software operation, Figure 12
for the Software ID Entry and Read timing diagram and
Figure 22 for the Software ID Entry command sequence
flowchart.
TABLE 3: Product Identification
Address
Manufacturer’s ID
Device ID
SST39VF6401
SST39VF6402
0001H
0001H
236BH
236AH
T3.2 1223(03)
Security ID
The SST39VF640x devices offer a 256-bit Security ID
space. The Secure ID space is divided into two 128-bit seg-
ments - one factory programmed segment and one user
programmed segment. The first segment is programmed
and locked at SST with a random 128-bit number. The user
segment is left un-programmed for the customer to pro-
gram as desired.
To program the user segment of the Security ID, the user
must use the Security ID Word-Program command. To
detect end-of-write for the SEC ID, read the toggle bits. Do
not use Data# Polling. Once this is complete, the Sec ID
should be locked using the User Sec ID Program Lock-Out.
This disables any future corruption of this space. Note that
regardless of whether or not the Sec ID is locked, neither
Sec ID segment can be erased.
The Secure ID space can be queried by executing a three-
byte command sequence with Enter Sec ID command
(88H) at address 5555H in the last byte sequence. To exit
this mode, the Exit Sec ID command should be executed.
Refer to Table 6 for more details.
Data
BFH
0000H
Product Identification Mode Exit/
CFI Mode Exit
In order to return to the standard Read mode, the Software
Product Identification mode must be exited. Exit is accom-
plished by issuing the Software ID Exit command
sequence, which returns the device to the Read mode.
This command may also be used to reset the device to the
Read mode after any inadvertent transient condition that
apparently causes the device to behave abnormally, e.g.,
not read correctly. Please note that the Software ID Exit/
CFI Exit command is ignored during an internal Program or
Erase operation. See Table 6 for software command
codes, Figure 14 for timing waveform, and Figures 22 and
23 for flowcharts.
©2008 Silicon Storage Technology, Inc.
S71223(03)-00-EOL
6/08
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