- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371435 > 28F800C3 (INTEL CORP) 3 Volt Advanced Boot Block Flash Memory(3 V 高級(jí)快速引導(dǎo)塊閃速存儲(chǔ)器) PDF資料下載
參數(shù)資料
| 型號(hào)： | 28F800C3 |
| 廠商： | INTEL CORP |
| 元件分類： | DRAM |
| 英文描述： | 3 Volt Advanced Boot Block Flash Memory(3 V 高級(jí)快速引導(dǎo)塊閃速存儲(chǔ)器) |
| 中文描述： | 16M X 8 FLASH 3V PROM |
| 文件頁數(shù)： | 19/59頁 |
| 文件大?。?/td> | 321K |
| 代理商： | 28F800C3 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁當(dāng)前第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁
E
3.3
28F800C3, 28F160C3, 28F320C3
19
PRELIMINARY
Flexible Block Locking
Intel 3 Volt Advanced+ Boot Block products offer an
instant, individual block locking scheme that allows
any block to be locked or unlocked with no latency,
enabling instant code and data protection.
This locking scheme offers two levels of protection.
The first level allows software-only control of block
locking (useful for data blocks that change
frequently), while the second level requires
hardware interaction before locking can be changed
(useful for code blocks that change infrequently).
The following sections will discuss the operation of
the locking system. The term
“state [XYZ]” will be
used to specify locking states; e.g., “state [001],”
where X = value of WP#, Y = bit DQ
1
of the Block
Lock status register, and Z = bit DQ
0
of the Block
Lock status register. Table 9 defines all of these
possible locking states.
3.3.1
LOCKING OPERATION
The following concisely summarizes the locking
functionality.
All blocks power-up locked, then can be
unlocked or locked with the Unlock and Lock
commands.
The Lock-Down command locks a block and
prevents it from being unlocked when WP# = 0.
When WP# = 1, Lock-Down is overridden
and commands can unlock/lock locked-
down blocks.
When WP# returns to 0, locked-down
blocks return to Lock-Down.
Lock-Down is cleared only when the device
is reset or powered-down.
The locking status of each block can be set to
Locked, Unlocked, and Lock-Down, each of which
will be described in the following sections. A
comprehensive state table for the locking functions
is shown in Table 9, and a flowchart for locking
operations is shown inFigure 15.
3.3.2
LOCKED STATE
The default status of all blocks upon power-up or
reset is locked (states [001] or [101]). Locked
blocks are fully protected from alteration. Any
program or erase operations attempted on a locked
block will return an error on bit SR.1 of the status
register. The status of a locked block can be
changed to Unlocked or Lock-Down using the
appropriate software commands. An Unlocked
block can be locked by writing the Lock command
sequence, 60H followed by 01H.
3.3.3
UNLOCKED STATE
Unlocked blocks (states [000], [100], [110]) can be
programmed or erased. All unlocked blocks return
to the Locked state when the device is reset or
powered down. The status of an unlocked block can
be changed to Locked or Locked-Down using the
appropriate software commands. A Locked block
can be unlocked by writing the Unlock command
sequence, 60H followed by D0H.
3.3.4
LOCK-DOWN STATE
Blocks that are Locked-Down (state [011]) are
protected from program and erase operations (just
like Locked blocks), but their protection status
cannot be changed using software commands
alone. A Locked or Unlocked block can be Locked-
down
by
writing
the
sequence, 60H followed by 2FH. Locked-Down
blocks revert to the Locked state when the device is
reset or powered down.
Lock-Down
command
The Lock-Down function is dependent on the WP#
input pin. When WP# = 0, blocks in Lock-Down
[011] are protected from program, erase, and lock
status changes. When WP# = 1, the Lock-Down
function is disabled ([111]) and locked-down blocks
can be individually unlocked by software command
to the [110] state, where they can be erased and
programmed. These blocks can then be relocked
[111] and unlocked [110] as desired while WP#
remains high. When WP# goes low, blocks that
were
previously
locked-down
Lock-Down state [011] regardless of any changes
made while WP# was high. Device reset or power-
down resets all blocks, including those in Lock-
Down, to Locked state.
return
to
the
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 28F160C3 | 3 Volt Advanced Boot Block Flash Memory(3 V 高級(jí)快速引導(dǎo)塊閃速存儲(chǔ)器) |
| 28F320D18 | 1.8 Volt Intel Dual-Plane Flash Memory(1.8 V Intel 雙平面閃速存儲(chǔ)器) |
| 28F320J5 | 5 Volt Intel StrataFlash Memory(5 V 32M位英特爾StrataFlash存儲(chǔ)器) |
| 28F640J5 | 5 V Intel StrataFlash Memory(5V 64M位英特爾StrataFlash閃速存儲(chǔ)器) |
| 28F400B3 | SMART 3 ADVANCED BOOT BLOCK WORD-WIDE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 28F800CE-T/B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Boot Flash |
| 28F800CV-T/B | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-MBIT (512K X 16. 1024K X 8) SmartVoltage BOOT BLOCK FLASH MEMORY FAMILY |
| 28F800F3 | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:FAST BOOT BLOCK FLASH MEMORY FAMILY 8 AND 16 MBIT |
| 28FAN2500_AAA3A862 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
| 28FAN2502_AAA3A862 WAF | 制造商:Fairchild Semiconductor Corporation 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。