R8A77800ANBGAV Renesas Electronics America, R8A77800ANBGAV Datasheet - Page 953

• Manufacturer Part Number: R8A77800ANBGAV
• Description: IC SUPERH MPU ROMLESS 449-BGA
• Manufacturer: Renesas Electronics America
• Series: SuperH® SH7780r

Specifications of R8A77800ANBGAV

• Core Processor: SH-4A
• Core Size: 32-Bit
• Speed: 400MHz
• Connectivity: Audio Codec, MMC, Serial Sound, SCI, SIO, SPI, SSI
• Peripherals: DMA, POR, WDT
• Number Of I /o: 75
• Program Memory Type: ROMless
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 1.15 V ~ 1.35 V
• Oscillator Type: External
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 449-BGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Program Memory Size: -
• Data Converters: -

24.4
The multimedia card is an external storage media that can be easily connected or disconnected.
The MMCIF 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.
Do not connect or disconnect the card during command sequence execution or in the data busy
state.
24.4.1
MMC mode is an operating mode in which the transfer clock is output from the MCCLK pin,
command transmission/response receive occurs via the MCCMD pin, and data is
transmitted/received via the MCDAT pin. In this mode the next command can be issued while
data is being transmitted/received.
This feature is efficient for multiple block or stream transfer. In this case, the next command is the
CMD12 command, which aborts the current command sequence.
In MMC mode, broadcast commands that simultaneously issue commands to multiple cards are
supported. After information of the inserted cards is recognized by a broadcast command, a
relative address is given to each card. One card is selected by the relative address, other cards are
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.
(1)
CMD0, CMD1, CMD2, and CMD4 are broadcast commands. These commands and the CMD3
command comprise a sequence assigning relative addresses to individual cards. In this sequence,
the CMD output format is open drain, and the command response is wired-OR. During the
issuance of this command sequence, the transfer clock frequency should be set to a sufficiently
low value.
Operation of Broadcast Commands
Operation
Operations in MMC Mode
Section 24 Multimedia Card Interface (MMCIF)
Rev.1.00 Dec. 13, 2005 Page 901 of 1286
REJ09B0158-0100