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參數(shù)資料
| 型號： | MBM29F080AC-90PFTN |
| 廠商： | Fujitsu Limited |
| 元件分類： | 基準電壓源/電流源 |
| 英文描述： | Single-Channel Current-Limited Power Distribution Switch 8-MSOP-PowerPAD -40 to 85 |
| 中文描述： | 8米（1米× 8）位 |
| 文件頁數(shù)： | 12/47頁 |
| 文件大小： | 564K |
| 代理商： | MBM29F080AC-90PFTN |
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12
MBM29F080A
-55/-70/-90
Write
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
command 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.
Refer to AC Write Characteristics and the Erase/Programming Waveforms for specific timing parameters.
Sector Group Protection
The MBM29F080A features hardware sector group protection. This feature will disable both program and erase
operations in any combination of eight sector groups of memory. Each sector group consists of four adjacent
sectors grouped in the following pattern: sectors 0-1, 2-3, 4-5, 6-7, 8-9, 10-11, 12-13, and 14-15(see Table 5).
The sector group protection feature is enabled using programming equipment at the user's site. The device is
shipped with all sector groups unprotected.
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
. The sector addresses (A
19
, A
18
, and A
17
) should be set to the sector to be protected.
Tables 4 and 5 define the sector address for each of the thirty two (16) individual sectors, and the sector group
address for each of the eight (8) 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 addresses must be held
constant during the WE pulse. See figures 14 and 21 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
19
, A
18
, and A
17
) 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
00H 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.
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
19
, A
18
, and
A
17
) are the desired sector group address will produce a logical “1” at DQ
0
for a protected sector group. See
Table 3 for Autoselect codes.
相關PDF資料 |
PDF描述 |
|---|---|
| MBM29F080AC-90PFTR | Single-Channel Current-Limited Power Distribution Switch 8-MSOP-PowerPAD -40 to 85 |
| MBM29F080AC-90PTN | Single-Channel Current-Limited Power Distribution Switch 8-MSOP-PowerPAD -40 to 85 |
| MBM29F080AC-90PTR | Single-Channel Current-Limited Power Distribution Switch 8-SOIC -40 to 85 |
| MBM29F080AC-55PF | M39012 MIL RF CONNECTOR |
| MBM29F080AC-55PFTN | M39012 MIL RF CONNECTOR |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| MBM29F080AC-90PFTR | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8M (1M X 8) BIT |
| MBM29F080AC-90PTN | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8M (1M X 8) BIT |
| MBM29F080AC-90PTR | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:8M (1M X 8) BIT |
| MBM29F160BE-55 | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16M (2M X 8/1M X 16) BIT |
| MBM29F160BE-55PFTN | 制造商:FUJITSU 制造商全稱:Fujitsu Component Limited. 功能描述:16M (2M X 8/1M X 16) BIT |
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