MultiMedia Card (MMC) pinout |
memory connector |
MMC memory cards are up to 1Gb and uses up to 20MHz 1-bit data bus
7 pin MM-card special connector | The MultiMedia Card communication is based on serial bus designed to operate in a low voltage range.
For compatibility to existing controllers the cards may offer,in addition to the MultiMedia Card mode, an alternate general-purpose synchronous serial interface which is based on the SPI (Serial Peripheral Interface) standard.
The MultiMediaCard card identification and addressing methods are replaced by a hardware Chip Select (CS) signal. For every command, a card (slave) is selected by asserting the CS signal (active low). The CS signal must be continuously active for the duration of the SPI transactions. The MM card bidirectional CMD and DAT lines are replaced by unidirectional DATA in and DATA out signals (single and multiple block read/write commands are supported). | |||||||||||||||||||||||||||||||||||||||||||||||||
Pinouts.ru > Memory slots and cards connectors pinouts > Pinout of MultiMedia Card (MMC) and layout of 7 pin MM-card special connector |
correct | |
Source(s) of this and additional information: MultiMedia Card System Summary and others | 3 reports | |
Last updated at Tue Sep 11 2007. Submit additions or corrections for this document. | Is this document correct or incorrect? What is your opinion? |