參數(shù)資料
型號(hào)： W78M64V100SBC
廠商： WHITE ELECTRONIC DESIGNS CORP
元件分類： PROM
英文描述： 8M X 64 FLASH 3.3V PROM MODULE, 100 ns, PBGA159
封裝： 13 X 22 MM, 1.27 MM PITCH, PLASTIC, BGA-159
文件頁(yè)數(shù)： 14/54頁(yè)
文件大?。?/td> 1348K
代理商： W78M64V100SBC
21
White Electronic Designs Corporation (602) 437-1520 www.whiteedc.com
White Electronic Designs
W78M64V-XSBX
July 2006
Rev. 4
White Electronic Designs Corp. reserves the right to change products or specications without notice.
TEMPORARY SECTOR UNPROTECT
This feature allows temporary unprotection of previously
protected sectors to change data in-system. The Sector
Unprotect mode is activated by setting the RESET# pin to
VID. During this mode, formerly protected sectors can be
programmed or erased by selecting the sector addresses.
Once VID is removed from the RESET# pin, all the previously
protected sectors are protected again. Figure 3 shows the
algorithm, and Figure 24 shows the timing diagrams, for
this feature. While PPB lock is set, the device cannot enter
the Temporary Sector Unprotection Mode.
SecSi sector is divided into 64 factory-lockable words that
can be programmed and locked by the user. The SecSi
sector is located at addresses 000000h-00007Fh in both
Persistent Protection mode and Password Protection mode.
It uses indicator bits (DQ6, DQ7) to indicate the factory-
locked and user-locked status of the part.
The system accesses the SecSi Sector through a command
sequence (see “Enter SecSi Sector/Exit SecSi Sector
Command Sequence”). After the sysem has written the
Enter SecSi Sector command sequence, it may read the
SecSi Sector by using the addresses normally occupied by
the boot sectors. This mode of operation continues until the
system issues the Exit SecSi Sector command sequence,
or until power is removed from the device. On power-up, or
following a hardware reset, the device reverts to sending
commands to the normal address space. Note that the ACC
function and unlock bypass modes are not available when
the SecSi Sector is enabled.
Factory-Locked Area (64 words)
The factory-locked area of the SecSi Sector (000000h-
00003Fh) is locked when the part is shipped, whether or
not the area was programmed at the factory. The SecSi
Sector Factory-locked Indicator Bit (DQ7) is permanently
set to a “1”.
User-Lockable Area (64 words)
The user-lockable area of the SecSi Sector (000040h-
00007Eh) is shipped unprotected, which allows the user
to program and optionally lock the area as appropriate for
the application. The SecSi Sector User-locked Indicator Bit
(DQ6) is shipped as “0” and can be permanently locked to
“1” by issuing the SecSi Protection Bit Program Command.
The SecSi Sector can be read any number of times, but
can be programmed and locked only once. Note that
the accelerated programming (ACC) and unlock bypass
functions are not available when programming the SecSi
Sector.
The User-lockable SecSi Sector area can be protected using
one of the following procedures:
Follow the SecSi Sector protection Agorithm as
shown in Figure 4. This allows in-system protection
of the SecSi Sector without raising any device pin
to a high voltage. Note that this method is only
appliacable to the SecSi Sector.
To verify the protect/unprotect status of the SecSi
Sector, follow the algorithm shown in Figure 5.
SecSi (SECURED SILICON) SECTOR
FLASH MEMORY REGION
The SecSi (Secured Silicon) Sector feature provides a Flash
memory region that enables permanent part identication
through an Electronic Serial Number (ESN) The 128-word
START
Perform Erase or
Program Operations
RESET# = V
IH
Temporary Sector
Unprotect Completed
(Note 2)
RESET# = V
ID
(Note 1)
FIGURE 3. TEMPORARY SECTOR UNPROTECT
OPERATION
Notes:
1.
All protected sectors unprotected (If WP#/ACC = VIL, sectors 0, 1, 268, 269 will
remain protected).
2.
All previously protected sectors are protected once again
相關(guān)PDF資料
PDF描述
W78M64VP120SBM SPECIALTY MEMORY CIRCUIT, PBGA156
W78M64VP120SBI SPECIALTY MEMORY CIRCUIT, PBGA156
W83L761G DIGITAL TEMP SENSOR-SERIAL
W8D-PF29062 36 CONTACT(S), FEMALE, STRAIGHT SINGLE PART CARD EDGE CONN, PRESS FIT
W8D-PF29063 36 CONTACT(S), FEMALE, STRAIGHT SINGLE PART CARD EDGE CONN, PRESS FIT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
W78M64VP110SBM 制造商:Microsemi Corporation 功能描述:8MX64 FLASH 3.3V PAGE MODE - Bulk
W78M64V-XSBX 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Flash MCP
W78NCSX-23 功能描述:低信號(hào)繼電器 - PCB 4PDT 3A 24VDC IND RoHS:否 制造商:NEC 觸點(diǎn)形式:2 Form C (DPDT-BM) 觸點(diǎn)電流額定值: 線圈電壓:5 V 最大開關(guān)電流:1 A 線圈電流:1 A 線圈類型:Non-Latching 功耗:140 mW 端接類型:SMT 絕緣: 介入損耗:
W78PCX-1 制造商:Magnecraft 功能描述:
W78PCX-2 制造商:Magnecraft 功能描述:
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*