- 您現在的位置：買賣IC網 > PDF目錄377951 > MBM29LV400T (Fujitsu Limited) CMOS 4M (512K ×8/256K×16) Falsh Memory(512K ×8/256K×16位 單5V 電源電壓閃速存儲器) PDF資料下載
參數資料
| 型號： | MBM29LV400T |
| 廠商： | Fujitsu Limited |
| 英文描述： | CMOS 4M (512K ×8/256K×16) Falsh Memory(512K ×8/256K×16位 單5V 電源電壓閃速存儲器) |
| 中文描述： | 的CMOS 4分（為512k × 8/256K × 16）Falsh存儲器（為512k × 8/256K × 16位單5V的電源電壓閃速存儲器） |
| 文件頁數： | 13/51頁 |
| 文件大?。?/td> | 334K |
| 代理商： | MBM29LV400T |
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頁當前第13頁第14頁第15頁第16頁第17頁第18頁第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
13
MBM29LV400T/MBM29LV400B
sector to be protected. Tables 5 and 6 define the sector address for each of the eleven (11) individual sectors.
Programming of the protection circuitry begins on the falling edge of the WE pulse and is terminated with the
rising edge of the same. Sector addresses must be held constant during the WE pulse. Refer to figures 15 and
22 for sector protection waveforms and algorithm.
To verify programming of the protection circuitry, the programming equipment must force V
ID
on address pin A
9
with CE and OE at V
IL
and WE at V
IH
. Scanning the sector addresses (A
17
, A
16
, A
15
, A
14
, A
13
, and A
12
) while (A
6
,
A
1
, A
0
) = (0, 1, 0) will produce a logical “1” code at device output DQ
0
for a protected sector. Otherwise the
devices will read 00H for unprotected sector. In this mode, the lower order addresses, except for A
0
, A
1
, and A
6
are DON'T CARE. Address locations with A
1
= V
IL
are reserved for Autoselect manufacturer and device codes.
A
-1
requires to apply to V
IL
on byte mode.
It is also possible to determine if a sector is protected in the system by writing an Autoselect command. Performing
a read operation at the address location XX02H, where the higher order addresses (A
17
, A
16
, A
15
, A
14
, A
13
, and
A
12
) are the desired sector address will produce a logical “1” at DQ
0
for a protected sector. See Tables 4.1 and
4.2 for Autoselect codes.
Temporary Sector Unprotection
This feature allows temporary unprotection of previously protected sectors of the MBM29LV400T/400B devices
in order to change data. The Sector Unprotection mode is activated by setting the RESET pin to high voltage
(12V). During this mode, formerly protected sectors can be programmed or erased by selecting the sector
addresses. Once the 12 V is taken away from the RESET pin, all the previously protected sectors will be protected
again. Refer to Figures 16 and 23.
RESET
Hardware Reset
The MBM29LV400T/400B devices may be reset by driving the RESET pin to V
IL
. The RESET pin has a pulse
requirement and has to be kept low (V
IL
) for at least 500 ns in order to properly reset the internal state machine.
Any operation in the process of being executed will be terminated and the internal state machine will be reset
to the read mode 20
μ
s after the RESET pin is driven low. Furthermore, once the RESET pin goes high, the
devices require an additional t
RH
= 50 ns before it will allow read access. When the RESET pin is low, the devices
will be in the standby mode for the duration of the pulse and all the data output pins will be tri-stated. If a hardware
reset occurs during a program or erase operation, the data at that particular location will be corrupted. Please
note that the RY/BY output signal should be ignored during the RESET pulse. Refer to Figure 12 for the timing
diagram. Refer to Temporary Sector Unprotection for additional functionality.
If hardware reset occurs during Embedded Erase Algorithm, there is a possibility that the erasing sector(s)
cannot be used.
相關PDF資料 |
PDF描述 |
|---|---|
| MBM29LV400TC-90 | 4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-90PBT | 4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-90PF | 4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-90PFTN | 4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-90PFTR | 4M (512K X 8/256K X 16) BIT |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MBM29LV400TC | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-12 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-12PBT | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-12PCV | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:4M (512K X 8/256K X 16) BIT |
| MBM29LV400TC-12PF | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:4M (512K X 8/256K X 16) BIT |
發(fā)布緊急采購，3分鐘左右您將得到回復。