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參數(shù)資料
| 型號： | IMC004FLSA |
| 廠商： | Intel Corp. |
| 英文描述： | SERIES 2 FLASH MEMORY CARDS iMC002FLSA, iMC004FLSA, iMC010FLSA, iMC020FLSA |
| 中文描述： | 系列2記憶卡iMC002FLSA，iMC004FLSA，iMC010FLSA，iMC020FLSA |
| 文件頁數(shù)： | 23/39頁 |
| 文件大?。?/td> | 548K |
| 代理商： | IMC004FLSA |
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SERIES 2 FLASH MEMORY CARDS
SYSTEM DESIGN CONSIDERATIONS
POWER SUPPLY DECOUPLING
Flash memory power-switching characteristics re-
quire careful device decoupling. System designers
are interested in three supply current issuesDstand-
by, active and transient current peaks, produced by
rising and falling edges of CE
1
Y
and CE
2
Y
. The
capacitive and inductive loads on the card and inter-
nal flash memory device pairs determine the magni-
tudes of these peaks.
The Flash Memory Card features on-card ceramic
decoupling capacitors connected between V
CC
and
GND, and between V
PP1
/V
PP2
and GND to help
transient voltage peaks.
On the host side, the card connector should also
have a 4.7
m
F electrolytic capacitor between V
CC
and GND, as well as between V
PP1
/V
PP2
and GND.
The bulk capacitors will overcome voltage slumps
caused by printed-circuit-board trace inductance,
and will supply charge to the smaller capacitors as
needed.
POWER UP/DOWN PROTECTION
Each device in the Flash Memory Card is designed
to offer protection against accidental erasure or writ-
ing, caused by spurious system-level signals that
may exist during power transitions. The card will
power-up into the Read Array Mode.
A system designer must guard against active writes
for V
CC
voltages above V
LKO
when V
PP
is active.
Since both WE
Y
and CE
1
Y
(and/or CE
2
Y
) must be
low for a command write, driving either to V
IH
will
inhibit writes. With its Command User Interface, al-
teration of device contents only occurs after suc-
cessful completion of the two-step command se-
quences.
While these precautions are sufficient for most appli-
cations, an alternative approach would allow V
CC
to
reach its steady state value before raising V
PP1
/
V
PP2
above V
CC
a
2.0V. In addition, upon power-
ing-down, V
PP1
/V
PP2
should be below V
CC
a
2.0V,
before lowering V
CC
.
HOT INSERTION/REMOVAL
The capability to remove or insert PC cards while the
system is powered on (i.e., hot insertion/removal)
requires careful design approaches on the system
and card levels. To design for this capability consid-
er card overvoltage stress, system power droop and
control line stability.
A PCMCIA/JEIDA specified socket properly se-
quences the power supplies to the flash memory
card via shorter and longer pins. This assures that
hot insertion and removal will not result in card dam-
age or data loss.
PCMCIA CARD INFORMATION
STRUCTURE
The Card Information Structure (CIS) starts at ad-
dress zero of the card’s Attribute Memory Plane. It
contains a variable-length chain of data blocks (tu-
ples) that conform to a basic format as shown in
Table 5. This section describes each tuple contained
within the Series 2 Flash Memory Card.
The Device Information Tuple
This tuple (CISTPLDDEV
e
01H) contains informa-
tion pertaining to the card’s speed and size. The Se-
ries 2 Card is offered with a 150 nanosecond access
time. Card sizes range between 2 and 20 Mega-
bytes.
Table 5. Tuple Format
Bytes
Data
0
Tuple Code: CISTPLDxxx. The tuple code 0FFH indicates no more tuples in the list.
Tuple Link: TPLDLlNK. Link to the next tuple in the list. This can be viewed as the number of
additional bytes in tuple, excluding this byte. If the link field is zero, the tuple body is empty. If the
link field contains 0FFH, this tuple is the last tuple in the list.
1
2
b
n
Bytes specific to this tuple.
23
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| IMC004FLSAET | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8/x16 Flash EEPROM Module |
| IMC010FLSA | 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:SERIES 2 FLASH MEMORY CARDS iMC002FLSA, iMC004FLSA, iMC010FLSA, iMC020FLSA |
| IMC010FLSAET | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:x8/x16 Flash EEPROM Module |
| IMC01GR | 制造商:MA-COM 制造商全稱:M/A-COM Technology Solutions, Inc. 功能描述:IM Series Signal Relays |
| IMC01TS | 制造商:MA-COM 制造商全稱:M/A-COM Technology Solutions, Inc. 功能描述:IM Series Signal Relays |
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