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參數(shù)資料
| 型號(hào)： | 5962-9458502H5X |
| 元件分類： | PROM |
| 英文描述： | 128K X 32 EEPROM 5V MODULE, 250 ns, CPGA66 |
| 封裝： | CERAMIC, PGA-66 |
| 文件頁數(shù)： | 8/12頁 |
| 文件大?。?/td> | 301K |
| 代理商： | 5962-9458502H5X |
A
A
Aeroflex Circuit Technology
SCD1662 REV C 9/6/02 Plainview NY (516) 694-6700
5
The usual procedure is to increment the least
significant address lines from A0 through A6
at each write cycle. In this manner a page of
up to 128 bytes can be loaded in to the
EEPROM in a burst mode before beginning
the relatively long interval programming
cycle.
After the
tBLC time out is completed, the
EEPROM begins an internal write cycle.
During this cycle the entire page will be
written at the same time.
The internal
programming cycle is the same regardless of
the number of bytes accessed.
SOFTWARE DATA PROTECTION
A software write protection feature may be
enabled or disabled by the user.
When
shipped by Aeroflex Microelectronics, the
ACT-E128K32 has the feature disabled.
Write access to the device is unrestricted.
To enable software write protection, the user
writes three access code bytes to three
special
internal
locations.
Once
write
protection has been enabled, each write to
the EEPROM must use the same three byte
write sequence to permit writing. The write
protection feature can be disabled by a six
byte write sequence of specific data to
specific locations. Power transitions will not
reset the software write protection.
Each 128K byte block of the EEPROM has
independent write protection. One or more
blocks may be enabled and the rest disabled
in any combination.
The software write
protection guards against inadvertent writes
during power transitions, or unauthorized
modification using a PROM programmer.
HARDWARE DATA PROTECTION
These features protect against inadvertent
writes to the ACT-E128K32. These are
included to improve reliability during normal
operation:
A) Vcc Sense
While below 3.8V typical write cycles
are inhibited.
B) Write inhibiting
Holding OE low and either CE or WE
high inhibits write cycles.
C) Noise filter
Pulses of <10ns (TYP) on WE or CE
will not initiate a write cycle.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 5962-9458503H5A | 制造商:Micross Components, Inc. 功能描述:EEPROM-MCM,4 MB - Trays |
| 5962-9458504H4A | 制造商:White Electronic Designs 功能描述:EEPROM Module Parallel 4Mbit 制造商:Micross Components, Inc. 功能描述:EEPROM-MCM,4 MB - Trays |
| 5962-9458504H4C | 制造商:Microsemi Corporation 功能描述:128K X 32 EEPROM MODULE, 150NS, NO CONNECT, 66 PGA 1.075" SQ - Bulk 制造商:White Electronic Designs 功能描述:128K X 32 EEPROM MODULE, 150NS, NO CONNECT, 66 PGA 1.075" SQ - Bulk |
| 5962-9458506HMC | 制造商:Microsemi Corporation 功能描述:128K X 32 EEPROM MODULE, 120NS, 68 CQFP 0.88" SQ., 0.180" HI - Bulk |
| 5962-9458507HZA | 制造商:Micross Components 功能描述:EEPROM-MCM,4MB - Trays |
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