SH7760 Datasheet, PDF (959/1345 Pages) Renesas Technology Corp – SuperHTM RISC engine

Section 26 Multimedia Card Interface (MMCIF)
This LSI supports a multimedia card interface (MMCIF). The MMC mode interface can be
utilized. The MMCIF is a clock-synchronous serial interface that transmits/receives data that is
distinguished in terms of command and response. A number of commands/responses are
predefined in the multimedia card. As the MMCIF specifies a command code and command
type/response type upon the issuance of a command, commands extended by the secure
multimedia card (Secure-MMC) and additional commands can be supported in the future within
the range of combinations of currently defined command types/response types.
26.1 Features
The MMCIF has the following features:
• Interface that complies with The MultiMediaCard System Specification Version 2.11
• Supports MMC mode
• 20-Mbps bit rate (max.) for the card interface at a peripheral operating clock of 20 MHz
• Incorporates 64 data-transfer FIFOs of 16 bits
• Supports DMA transfer
• Four interrupt sources
FIFO empty/full, command/response/data transfer complete, transfer error, and FIFO ready
• Interface via the MCCLK output (transfer clock output) pin, the MCCMD input/output
(command output/response input) pin, and the MCDAT input/output (data input/output) pin
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