Section 31 Multimedia Card Interface (MMCIF)
Rev. 1.00 Oct. 01, 2007 Page 1326 of 1956
REJ09B0256-0100
31.4 Operation
The multimedia card is an external storage media that can be easily connected or disconnected.
The MMCIF controls data transfer with the multimedia card and operates in MMC mode.
Insert a card and supply power to it. Then operate the MMCIF by applying the transfer clock after
setting an appropriate transfer clock frequency. In this case, MMC_VDDON and
MMC_ODMOD
are available for card power supply control and open-drain mode control, respectively.
A series of operations
starting with sending out commands, receiving a command response,
data transmit/receive, receiving data responses, etc.
is called the command sequence. The
command response starts with sending out commands by setting the START bit in CMDSTRT
and ends with the completion of all data transmit/receive and responses. The multimedia card may
go into the data busy state in which the card receives only special commands caused by writing to
or erasing the flash memory in the card. The data busy state is indicated by a ‘0’ output from the
card through the DAT pin.
Notes: Do not connect or disconnect the card during command sequence execution or in the data
busy state.
31.4.1
Operations in MMC Mode
MMC mode is an operating mode in which the transfer clock is output from the MMC_CLK pin,
command transmission/response reception occurs via the MMC_CMD pin, and data is
transmitted/received via the MMC_DAT pin. In this pin configuration, the next command can be
issued while data is being transmitted or received.
This feature is utilized for multiblock or stream transfer. The CMD12 command is an example of
where the current command sequence is aborted.
In MMC mode, broadcast commands that simultaneously issue commands to multiple cards are
supported. After information from the inserted cards is recognized through a broadcast command,
a relative address is given to each card. One card is selected by the relative address with other
cards deselected, and then various commands are issued to the selected card.
Commands in MMC mode are basically classified into three types: broadcast, relative address, and
flash memory operation commands. The card can be operated by issuing these commands
appropriately according to the card state.
Содержание SH7763
Страница 2: ...Rev 1 00 Oct 01 2007 Page ii of lxvi ...
Страница 122: ...Section 2 Programming Model Rev 1 00 Oct 01 2007 Page 56 of 1956 REJ09B0256 0100 ...
Страница 144: ...Section 3 Instruction Set Rev 1 00 Oct 01 2007 Page 78 of 1956 REJ09B0256 0100 ...
Страница 170: ...Section 4 Pipelining Rev 1 00 Oct 01 2007 Page 104 of 1956 REJ09B0256 0100 ...
Страница 282: ...Section 7 Caches Rev 1 00 Oct 01 2007 Page 216 of 1956 REJ09B0256 0100 ...
Страница 378: ...Section 9 Interrupt Controller INTC Rev 1 00 Oct 01 2007 Page 312 of 1956 REJ09B0256 0100 ...
Страница 514: ...Section 12 DDR SDRAM Interface DDRIF Rev 1 00 Oct 01 2007 Page 448 of 1956 REJ09B0256 0100 ...
Страница 630: ...Section 13 PCI Controller PCIC Rev 1 00 Oct 01 2007 Page 564 of 1956 REJ09B0256 0100 ...
Страница 686: ...Section 14 Direct Memory Access Controller DMAC Rev 1 00 Oct 01 2007 Page 620 of 1956 REJ09B0256 0100 ...
Страница 710: ...Section 16 Clock Pulse Generator CPG Rev 1 00 Oct 01 2007 Page 644 of 1956 REJ09B0256 0100 ...
Страница 732: ...Section 17 Watchdog Timer and Reset WDT Rev 1 00 Oct 01 2007 Page 666 of 1956 REJ09B0256 0100 ...
Страница 752: ...Section 18 Power Down Mode Rev 1 00 Oct 01 2007 Page 686 of 1956 REJ09B0256 0100 ...
Страница 772: ...Section 19 Timer Unit TMU Rev 1 00 Oct 01 2007 Page 706 of 1956 REJ09B0256 0100 ...
Страница 824: ...Section 21 Compare Match Timer CMT Rev 1 00 Oct 01 2007 Page 758 of 1956 REJ09B0256 0100 ...
Страница 1060: ...Section 23 Gigabit Ethernet Controller GETHER Rev 1 00 Oct 01 2007 Page 994 of 1956 REJ09B0256 0100 ...
Страница 1062: ...Section 24 IP Security Accelerator SECURITY Rev 1 00 Oct 01 2007 Page 996 of 1956 REJ09B0256 0100 ...
Страница 1124: ...Section 26 I 2 C Bus Interface IIC Rev 1 00 Oct 01 2007 Page 1058 of 1956 REJ09B0256 0100 ...
Страница 1184: ...Section 27 Serial Communication Interface with FIFO SCIF Rev 1 00 Oct 01 2007 Page 1118 of 1956 REJ09B0256 0100 ...
Страница 1350: ...Section 30 SIM Card Module SIM Rev 1 00 Oct 01 2007 Page 1284 of 1956 REJ09B0256 0100 ...
Страница 1484: ...Section 33 Audio Codec Interface HAC Rev 1 00 Oct 01 2007 Page 1418 of 1956 REJ09B0256 0100 ...
Страница 1560: ...Section 35 USB Host Controller USBH Rev 1 00 Oct 01 2007 Page 1494 of 1956 REJ09B0256 0100 ...
Страница 1720: ...Section 37 LCD Controller LCDC Rev 1 00 Oct 01 2007 Page 1654 of 1956 REJ09B0256 0100 ...
Страница 2025: ......
Страница 2026: ...SH7763 Hardware Manual ...