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Memory Card
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.Flash Memory Card 2005
Thursday, June 09, 2005
Flash memory is a form of EEPROM that allows multiple
memory locations to be erased or written in one
programming operation. In lay terms, it is a form of
rewritable memory chip that, unlike a Random Access
Memory chip, holds its content without maintaining a
power supply.
Normal EEPROM only allows one location at a time to be
erased or written, meaning that flash memory can operate
at higher effective speeds when the system uses it to
read and write to different locations at the same time.
All types of flash memory and EEPROM wear out after a
certain number of erase operations, due to wear on the
insulating oxide layer around the charge storage
mechanism used to store data.
Flash memory is non-volatile, which means that it stores
information on a silicon chip in a way that does not need
power to maintain the information in the chip. In
addition, flash memory offers fast read access times and
solid-state shock resistance. These characteristics
explain the popularity of flash memory for applications
such as storage on battery-powered devices like mobile
phones and personal digital assistants.
Flash memory is based on the Floating-Gate Avalanche-Injection
Metal Oxide Semiconductor (FAMOS transistor) which is
essentially an NMOS transistor with an additional
conductor suspended between the gate and source/drain
terminals.Flash memory is made in two forms: NOR flash
and NAND flash. The names refer to the type of logic gate
used in each storage cell. Flash memory is often used in
MP3 players, digital cameras and mobile phones.
50-pin CompactFlash™ Type I Memory Card
A CompactFlash Type I memory card is a solid-state disk
card with a 50-pin connector. The pins provide a
connection between the memory and the CompactFlash drive
in your electronic device. CompactFlash cards are used
more like a hard drive than RAM. They are designed with
flash technology, a non-volatile storage solution that
does not lose its information when power is removed from
the card. The cards contain no moving parts and are
extremely rugged, providing much greater data protection
than conventional magnetic disk drives.
CompactFlash cards are commonly used in portable
applications such as digital cameras, digital music
players, and personal digital assistants (PDAs).
When buying CompactFlash, be sure it is the type of
memory card your device takes—most cameras and other
devices can accept only one type of card (MultiMediaCard™,
CompactFlash card, or Secure Digital™ card).
CompactFlash Type I cards can be used in a CompactFlash
Type II slot. CompactFlash Type II cards cannot be used
in Type I slots. CompactFlash Type I cards can also be
used in Type III PCMCIA slots with an optional adapter or
with card readers that connect to USB ports and serial
ports.
CompactFlash Type I cards weigh just a half-ounce and are
about the size of a matchbook: 1.6 inches long, 1.4
inches high, and 0.13 inches thick (40.6 mm by 35.6 mm by
3.3 mm).
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Secure Digital Card
Secure Digital cards are solid-state devices designed
with flash technology, a non-volatile storage solution
that does not lose its information when power is removed
from the card. The cards contain no moving parts and are
extremely rugged, providing much greater data protection
than conventional magnetic disk drives.
The SD card's nimble, portable data transfer and low
battery consumption makes it ideal for high-speed digital
cameras, camcorders, MP3s, cell phones, PDAs, and global
positioning systems. Interface options include an SD
interface or a serial peripheral interface.
SD cards measure 0.95 inches wide, 1.26 inches high, and
0.08 inches thick (24 mm by 32 mm by 2.1 mm).
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High-Speed Secure Digital Cards
High-Speed Secure Digital cards are solid-state devices
designed with flash technology, a non-volatile storage
solution that does not lose its information when power is
removed from the card. The cards contain no moving parts
and are extremely rugged, providing much greater data
protection than conventional magnetic disk drives.
The high-speed SD card's nimble, portable data transfer
makes it ideal for high-speed digital cameras, camcorders,
MP3s, cell phones, PDAs, and global positioning systems.
Interface options include an SD interface or a serial
peripheral interface.
High-Speed SD cards measure 0.95 inches wide, 1.26 inches
high, and 0.08 inches thick (24 mm by 32 mm by 2.1 mm).
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MiniSD
miniSD (Secure Digital™) Card are solid-state devices
designed with flash technology, a non-volatile storage
solution that does not lose its information when power is
removed from the card. The cards contain no moving parts
and are extremely rugged, providing much greater data
protection than conventional magnetic disk drives.
Like regular SD cards, the miniSD card's nimble, portable
data transfer makes it ideal for portable electronic
devices. The miniSD's smaller size (it is about 40
percent of the size of a regular SD card) is designed for
use in newer mobile phones, which have memory-hungry
features such as built-in digital cameras, music download
capability, and games.
However, the card uses an adapter that converts the
miniSD card into a regular-sized SD card so that the card
can be used with other SD-compatible devices, such as
digital cameras, MP3 players, and handheld computers. The
adapter is also great for using your miniSD card in card
readers that accept SD cards but not miniSD cards.
MiniSD cards measure 0.8465 inches wide, 0.7874 inches
high, and 0.05512 inches thick (21.5 mm by 20 mm by 1.4
mm).
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MultiMediaCards™
A MultiMediaCard is a solid-state disk card with a 7-pin
connector. The pins provide a connection between the
memory and your electronic device. MultiMediaCards are
used more like a hard drive than RAM. They are designed
with flash technology, a non-volatile storage solution
that does not lose its information when power is removed
from the card. The cards contain no moving parts and are
extremely rugged, providing much greater data protection
than conventional magnetic disk drives.
MultiMediaCards are commonly used in portable devices
such as digital cameras, digital music players, and
personal digital assistants (PDAs). When buying
MultiMediaCards, be sure it is the type of memory card
your device uses—most cameras and other devices can
accept only one type of card (MultiMediaCard™,
CompactFlash card, or Secure Digital™ card).
MultiMediaCards weigh just 2 grams and are about the size
of a postage stamp: 1.26 inches long, 0.94 inches high,
and 0.06 inches thick (32 mm by 24 mm by 1.4 mm).
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Memory Stick®
The Memory Stick is a digital film card designed with
flash technology, a non-volatile storage solution that
does not lose its information when power is removed from
the card. The solid-state cards contain no moving parts
and are extremely rugged, providing much greater data
protection than conventional magnetic disk drives.
Memory Stick is about the size of a stick of gum and
comes in a 128MB capacity. Memory Sticks can be used in
an array of applications, including video cameras, audio
recorders, and computers with a Memory Stick slot.
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Olympus xD-Picture Card™
Compact, reliable, and durable, the Olympus xD-Picture
Card is a reusable digital media compatible with most
manufacturers' xD-compatible devices. You can use non-xD
devices as well, thanks to a number of new adapter
technologies that will be available including a
CompactFlash™ Adapter, SmartMedia™ USB Reader/Writer,
and PCMCIA/PC Card Adapter. The Olympus xD card is the
only xD card that supports the panorama function found on
most Olympus digital cameras.
Equipped with the most advanced storage technology
available, the Olympus xD-Picture Card is about the size
of a postage stamp, the xD card measures 0.787 inches
long, 0.984 inches wide, and 0.067 inches thick (20 mm by
25 mm by 1.7 mm).
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TransFlash Memory Module
The TransFlash product is an ultra small, semi-removable
flash memory module based on the miniSD card and TriFlash
designs for future mobile phone products, especially the
transfer of personal content between TransFlash-enabled
phones.
Due to the ultra small size of the product, it is not
intended to be handled or removed on a frequent basis.
The TransFlash form factor will be promoted globally to
other mobile phone manufacturers.
Advanced Features:
• Semi-removable Memory Module
• Expands memory capacity for mobile phones
• The world's smallest removable storage module
• Compatible with all TransFlash mobile devices
• The TransFlash memory module can be inserted into an
adapter and used in other SD-enabled devices
Product Specifications:
• Dimensions: 15 x 11 x 1 mm (L x W x D)
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