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Memory Cards Tutorial

Learn the differences between the several memory cards available for digital cameras on the market: Compact Flash (CF), Memory Stick (MS), MultiMediaCard (MMC), Secure Digital (SD), SmartMedia (SM) and xD.

Home » Memory Cards Tutorial

MultiMediaCard (MMC)

Contents

  • 1. Introduction
  • 2. CompactFlash (CF)
  • 3. Memory Stick (MS)
  • 4. MultiMediaCard (MMC)
  • 5. Secure Digital (SD)
  • 6. SmartMedia (SM)
  • 7. xD (eXtreme Digital)
  • 8. Summary

MultiMediaCard standard was introduced in 1997 and is used by companies such as HP, Nokia and Samsung. A new size was recently released, called RS-MMC, which stands for Reduced Size MMC and is a smaller MMC card. It can fit the original MMC slot by the use of an adapter.

MultiMediaCard (MMC)

Figure 4: MultiMediaCard (MMC).

RS-MMC

Figure 5: RS-MMC card.

Recently a new standard called MultiMediaCard Plus (a.k.a. MMC+, MMC Plus or MMC 4.0) was released, providing a higher speed rate.
Main Specs

  • Available Capacities (MMC): 32 MB, 64 MB and 128 MB
  • Available Capacities (RS-MMC): 128 MB, 256 MB and 512 MB
  • Available Capacities (MMC+): 256 MB, 512 MB and 1 GB
  • Read speed (MMC and RS-MMC): 2 MB/s
  • Read speed (MMC+): 11 MB/s
  • Write speed (MMC): 1 MB/s
  • Write speed (RS-MMC): 2 MB/s
  • Write speed (MMC+): 7 MB/s
  • Voltage: 2.7 V to 3.6 V
  • Power Consumption: < 33mA (read), < 35mA (write) and < 50µA (standby)
  • Length (MMC): 1.26 in (32 mm)
  • Length (RS-MMC): 0.71 in (18 mm)
  • Width: 0.94 in (24 mm)
  • Height: 0.05 in (1.4 mm)
  • Weight: 0.05 oz max (1.5 g max)
  • Operating temperature: -25º C to 85º C (-13º F to 185º F)
  • Storage  temperature: -40º C to 85º C (-40º F to 185º F)
  • Shock: 1000G max
  • Vibration: 15G peak-to-peak max
  • Humidity: 8% to 95%
  • For more information: https://www.mmca.org/
Continue: Secure Digital (SD)

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