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MMC Multi Media memory cards Categories
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MultiMediaCards use ROM technology for read-only applications and Flash technology
for read/write applications. The cards are fast and energy efficient for excellent
system performance in mobile phones, digital cameras and other portable device
products.
MultiMediaCards Highlights
- Highest Transfer Speed Available
- Greatest Flexibility and Support
- Backwards Compatible
The new MMCplus Card have these advanced features:
Highest clock frequency:
Extending the maximum clock frequencies from 20 MHz to 26 MHz and 52 MHz allows
higher data transfer rate and better compatibility to mobile phone architectural
requirements. Operating at 52 MHz in x8 bit mode, data can be transferred at
up to 52MB/sec, (or 416 Mbits/sec) a 20-fold improvement from the previous standards.
This is the highest data transfer rate of all existing memory card standards
available today.
Wider bus-width:
The new multiple (x1 bit, x4 bit and x8 bit) bus-width feature allows for host
design flexibility and higher data transfer bandwidth at a given clock speed,
to accommodate the more data intensive content in mobile phones and digital
cameras. Additionally, the MMCmobile Card is the first small form factor
memory card standard to offer dual-voltage operation at both 3/3.3V and 1.8V.
This is especially important for new generations of mobile phones and small
consumer electronics devices that require lower power consumption. It meets
the toughest space saving requirements, and is fully compatible with the original
MMC and MMCplus Cards when used with an extender typically supplied
with the card. MMCmobile is also fully compatible with the original
Reduced Size MMC (RS-MMC, 20 MHz, x1 bit). In fact, while the new specification
has 13 pins to accommodate the additional features, it is backward compatible
with all previous 7-pin versions.
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