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SST36VF1602 데이터시트(PDF) 2 Page - Silicon Storage Technology, Inc

부품명 SST36VF1602
상세설명  16 Megabit Concurrent SuperFlash
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제조업체  SST [Silicon Storage Technology, Inc]
홈페이지  http://www.sst.com/
Logo SST - Silicon Storage Technology, Inc

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© 2000 Silicon Storage Technology, Inc.
16 Megabit Concurrent SuperFlash
SST36VF1601 / SST36VF1602
Advance Information
S71142
373-3 11/00
gies, whose Erase and Program times increase with
accumulated Erase/Program cycles.
To meet high density, surface mount requirements, the
SST36VF1601/1602 are offered in 48-pin TSOP and 48-
ball TFBGA packages. See Figures 3 and 4 for pinouts.
Device Operation
Commands are used to initiate the memory operation
functions of the device. Commands are written to the
device using standard microprocessor write sequences.
A command 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 SST36VF1601/1602 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 IDD active read current to typically 4 µA. 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.
Concurrent Read/Write Operation
Dual bank architecture of SST36VF1601/1602 devices
allows the Concurrent Read/Write operation whereby the
user can read from one bank while program or erase in the
other bank. This operation can be used when the user
needs to read system code in one bank while updating
data in the other bank.
CONCURRENT READ/WRITE STATE TABLE
Bank 1
Bank 2
Read
No Operation
Read
Write
Write
Read
Write
No Operation
No Operation
Read
No Operation
Write
Note: For the purposes of this table, write means to Block-,
Sector-, or Chip-Erase, or Word-Program as applicable to
the appropriate bank.
Read
The Read operation of the SST36VF1601/1602 is con-
trolled 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 control 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 5).
Word-Program Operation
The SST36VF1601/1602 are programmed on a word-by-
word basis. The Program operation consists of 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 Program operation, once initi-
ated, will be completed within 10 µs. See Figures 6 and 7 for
WE# and CE# controlled Program operation timing dia-
grams and Figure 19 for flowcharts. During the Program
operation, the only valid reads are Data# Polling and Toggle
Bit. During the internal Program operation, the host is free
to perform additional tasks. Any commands issued during
the internal Program operation are ignored.
Sector- (Block-) Erase Operation
The Sector- (Block-) Erase operation allows the system to
erase the device on a sector-by-sector (or block-by-block)
basis. The SST36VF1601/1602 offer both Sector-Erase
and Block-Erase mode. The sector architecture is based on
uniform sector size of 1 KWord. The Block-Erase mode is
basedonuniformblocksizeof32KWord.TheSector-Erase
operation is initiated by executing a six-byte command
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. See Figures 11
and 12 for timing waveforms. Any commands issued during
the Sector- or Block-Erase operation are ignored.
Chip-EraseOperation
The SST36VF1601/1602 provide a Chip-Erase operation,
which allows the user to erase all unprotected sectors/
blocks to the “1” state. This is useful when the 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


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