最新的存储卡Samsung MMCMicro详细介绍(以及和T-flash,SD,MiniSD的对比)

solarsonic

The Flash Card Solution will be segmented by the different mobile phones requirement even though RS-MMC/MMCmobile become major card solution.

FunctionCharacteristics
High-
end Entertainment
Communication
Information
Finance 3D Game, VOD, DMB
MP3, DSC/DVC
Large LCD (2.8”)
Wireless LAN
Navigation (GPS)
Dual Slot (SIM/Card)
MMC
RS-MMC
MMCmobile
SecureMMC

Thin,
Light,
Small Communication
Information
Finance   MMCmicro

Low-
end Communication
Finance  Voice
Messaging (SMS, MSM) / Chatting
M-Commerce
Single Slot (SIM or Card)  Embedded
   Flash
SIM+Card  





Form Factor Size : 12.0mm x 14.0mm x 1.1mm






10pin, 12mm x 14mm x 1.1mm
Compatible with MMC Interface
> x1/x4 4bit Data Bus (based on MMC4.0)
1GByte with 5Stack Technology
> 4 x 2Gbit + 1 Controller
Shallow notch for preventing Flying-out
Support the hot-swapping by the socket



Higher Performance
> Use the high performance technology SLC(Single Layer Cell)
- X1 MMCmicro : > 1.9MB/s
- X4 MMCmicro : > 7.0MB/s
MMCmicro can operate on both 1.8V and 3V supply voltage
Lower Power Consumption
> Dual Voltage Support
> Lower Stand-by Current
Higher Density
> Use 5-Stack technology
- 512MB in early ’05, 1GB in late ‘05
Stronger Mechanical Spec
> Verified ESD immunity in current MMC
- Contact : 4KV, Air Discharge : 15KV
Open Standard Interface
> Use MMC interface
MMCmicro extends battery life and eliminate the need for voltage step-up circuits to power card slots in 1.8V systems.
> For example, TI OMAP 1710 chipset supplies only 1.8V to card now
> If 3V card is used, needs level-shifter
Data recorded on a dual-voltage card in a mobile phone operating at 1.8 V can be read by a PDA or similar device
   operating at 3 V.





ItemsMMCmicroTrans-Flash
Form Factor12mm x 14mm x 1.1mm11mm x 15mm x 1.0mm

InterfaceMMC 3.X & MMC 4.0SD

# of Pin10pin (1/4 data pins)8pin (4 data pins)

Frequency20MHz~52MHz25MHz

TechnologySLC FlashMLC Flash






Performance Comparison
> PC Type : AMD Athlon XP 1900+ 1.46GHz
> O/S : Win2000, Win XP
> Test size : 10MB
> Test Program : HD-Bench

Unit : [MB/S]

ItemsPC O/SSequential WriteRandom Write
SanDisk 128MB Trans-Flash20001.85 0.76

XP1.71 0.76

SEC MMCmicro 128MB20007.44 6.52

XP7.12 6.50

PDC 128MB MMC20001.93 0.69

XP1.87 0.69


MMC has better performance than Trans-Flash nevertheless supporting 1 bit data bus !!!




20models of Nokia high-end phone is targeted to have mega-pixel camera module in 2005.
MMCmicro is the best solution for the write speed of VGA/mega-pixel !!!