參數(shù)資料
型號： MBM29LV320BE10PBT
廠商： FUJITSU LTD
元件分類： DRAM
英文描述： #10/12 CONT.SBS50 LOW DET.
中文描述： 2M X 16 FLASH 3V PROM, 100 ns, PBGA63
封裝： PLASTIC, FBGA-63
文件頁數(shù)： 24/64頁
文件大?。?/td> 877K
代理商： MBM29LV320BE10PBT
MBM29LV320TE/BE
80/90/10
24
Word 0 (A
0
=
V
IL
) represents the manufacturer’s code (Fujitsu
=
04h) and word 1 (A
0
=
V
IH
) represents the device
identifier code. Word 3 (A
1
=
A
0
=
V
IH
) represents the extended device code. These three bytes/words are given
in “MBM29LV320TE/BE Sector Group Protection Verify Autoselect Codes Table”and “Expanded Autoselect Code
Table“ (
I
DEVICE BUS OPERATIONS) . In order to read the proper device codes when executing the autoselect,
A
1
must be V
IL
. (See “MBM29LV320TE/BE Sector Group Protection Verify Autoselect Codes Table” and “Ex-
panded Autoselect Code Table“ in
I
DEVICE BUS OPERATIONS.)
Write
6.
The device erasure and programming are accomplished via the command register. The contents of the register
serve as inputs to the internal state machine. The state machine outputs dictate the function of the device.
The command register itself does not occupy any addressable memory location. The register is a latch used to
store the commands, along with the address and data information needed to execute the command. The com-
mand register is written by bringing WE to V
IL
, while CE is at V
IL
and OE is at V
IH
. Addresses are latched on the
falling edge of WE or CE, whichever happens later; while data is latched on the rising edge of WE or CE,
whichever happens first. Standard microprocessor write timings are used.
See “Read Only Operation Characteristics” in
I
AC CHARACTERISTICS for specific timing parameters.
Sector Group Protection
7.
The device features hardware sector group protection. This feature will disable both program and erase opera-
tions in any combination of twenty five sector groups of memory. (See “Sector Group Address Tables
(MBM29LV320TE/BE)” in
I
FLEXIBLE SECTOR-ERASE ARCHITECTURE). The sector group protection feature
is enabled using programming equipment at the user’s site. The device is shipped with all sector groups unpro-
tected.
To activate this mode, the programming equipment must force V
ID
on address pin A
9
and control pin OE, (suggest
V
ID
=
11.5 V) , CE
=
V
IL
and A
6
=
A
0
=
V
IL
, A
1
=
V
IH
. The sector group addresses (A
20
, A
19
, A
18
, A
17
, A
16
, A
15
, A
14
,
A
13
, and A
12
) should be set to the sector to be protected. “Sector Address Tables (MBM29LV320TE/BE)” in
I
FLEXIBLE SECTOR-ERASE ARCHITECTURE define the sector address for each of the seventy one (71)
individual sectors, and “Sector Group Address Tables (MBM29LV320TE/BE)” in
I
FLEXIBLE SECTOR-ERASE
ARCHITECTURE define the sector group address for each of the twenty five (25) individual group 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 group addresses must be held constant during the WE pulse. See “14. Sector
Group Protection Timing Diagram” in
I
TIMING DIAGRAM and “5. Sector Group Protection Algorithm” in
I
FLOW
CHART for sector group 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 group addresses (A
20
, A
19
, A
18
, 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 device will produce “0” for unprotected sector. In this mode, the lower order addresses, except
for A
0
, A
1
, and A
6
are DON’T CARES. 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 group 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
20
, A
19
, A
18
, A
17
,
A
16
, A
15
, A
14
, A
13
, and A
12
) are the desired sector group address will produce a logical “1” at DQ
0
for a protected
sector group. See “MBM29LV320TE/BE Sector Group Protection Verify Autoselect Codes Table” and “Expanded
Autoselect Code Table” in
I
DEVICE BUS OPERATIONS for Autoselect codes.
Temporary Sector Group Unprotection
8.
This feature allows temporary unprotection of previously protected sector groups of the device in order to change
data. The Sector Group Unprotection mode is activated by setting the RESET pin to high voltage (V
ID
) . During
this mode, formerly protected sector groups can be programmed or erased by selecting the sector group ad-
dresses. Once the V
ID
is taken away from the RESET pin, all the previously protected sector groups will be
protected again. See “15. Temporary Sector Group Unprotection Timing Diagram” in
I
TIMING DIAGRAM and
“6. Temporary Sector Group Unprotection Algorithm” in
I
FLOW CHART.
相關(guān)PDF資料
PDF描述
MBM29LV320BE10TN 32 M (4 M X 8/2 M X 16) BIT
MBM29LV320TE90TR 32 M (4 M X 8/2 M X 16) BIT
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MBM29LV320TE80PBT 32 M (4 M X 8/2 M X 16) BIT
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MBM29LV320BE10TN 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32 M (4 M X 8/2 M X 16) BIT
MBM29LV320BE10TR 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32 M (4 M X 8/2 M X 16) BIT
MBM29LV320BE80 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32 M (4 M X 8/2 M X 16) BIT
MBM29LV320BE80PBT 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32 M (4 M X 8/2 M X 16) BIT
MBM29LV320BE80TN 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:32 M (4 M X 8/2 M X 16) BIT
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