參數(shù)資料
型號(hào)： MBM29F400BC-90PF
廠商： FUJITSU LTD
元件分類： DRAM
英文描述： Current-Limited, Power-Distribution Switches 16-SOIC -40 to 85
中文描述： 256K X 16 FLASH 5V PROM, 90 ns, PDSO44
封裝： PLASTIC, SOP-44
文件頁數(shù)： 12/47頁
文件大?。?/td> 542K
代理商： MBM29F400BC-90PF
12
MBM29F400TC
-55/-70/-90
/MBM29F400BC
-55/-70/-90
To activate this mode, the programming equipment must force V
ID
on address pin A
9
and control pin OE, (suggest
V
ID
= 11.5V), CE = V
IL
, and A
6
= V
IL
. The sector addresses (A
17
, A
16
, A
15
, A
14
, A
13
, and A
12
) should be set to the
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 16 and
23 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 produce 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 MBM29F400TC/BC device in
order to change data. The Sector Unprotection mode is activated by setting the RESET pin to high voltage
(12 V). 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 17 and 24.
相關(guān)PDF資料
PDF描述
MBM29F400BC-90PFTN Current-Limited, Power-Distribution Switches 16-SOIC -40 to 85
MBM29F400BC-90PFTR Current-Limited, Power-Distribution Switches 16-SOIC -40 to 85
MBM29F400TC Current-Limited, Power-Distribution Switches 16-SOIC -40 to 85
MBM29F400TC-55 Replaced by TPS2044B : 0.7A, 2.7-5.5V Quad (2In/4Out) Hi-Side MOSFET, Fault Report, Act-Low Enable 16-SOIC -40 to 85
MBM29F400TC-55PF 4M (512K X 8/256K X 16) BIT
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MBM29F400BC-90PFTN 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:4M (512K X 8/256K X 16) BIT
MBM29F400BC-90PFTN-SFL(E1) 制造商:Spansion 功能描述:
MBM29F400BC-90PFTN-SFLE1 制造商:Spansion 功能描述:IC 5V 4M FLASH
MBM29F400BC-90PFTR 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:4M (512K X 8/256K X 16) BIT
MBM29F400BC-90PFVGTSFLE1 制造商:Spansion 功能描述:
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