24. Multimedia Card Interface (MMCIF)
Rev.1.00 Jan. 10, 2008 Page 1196 of 1658
REJ09B0261-0100
24.3.10
Mode Register (MODER)
MODER is an 8-bit readable/writable register that specifies the MMCIF operating mode. The
following sequence should be repeated when the MMCIF uses the multimedia card: Send a
command, wait for the end of the command sequence and the end of the data busy state, and send
a next command.
The series of operations from command sending, command response reception, data
transmission/reception, and data response reception is called as the command sequence. The
command sequence starts from sending a command by setting the CMDSTART bit in CMDSTRT
to 1, and ends when all necessary data transmission/reception and response reception have been
completed. The multimedia card supports the data busy state such that only the specific command
is accepted to write/erase data to/from the flash memory in the card during command sequence
execution and after command sequence execution has ended. The data busy state is indicated by a
low level output from the card side to the MMCDAT pin.
Bit:
Initial value:
R/W:
7
6
5
4
3
2
1
0
0
0
0
0
0
0
0
0
R
MODE
R
R
R
R
R
R
R/W
⎯
⎯
⎯
⎯
⎯
⎯
⎯
Bit Bit
Name
Initial
Value R/W Description
7 to 1
—
All 0
R
Reserved
These bits are always read as 0. The write value should
always be 0.
0 MODE
0 R/W
Operating
Mode
Specifies the MMCIF operating mode.
0: Operates in MMC mode
1: Setting prohibited
Содержание SH7781
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Страница 1326: ...25 Audio Codec Interface HAC Rev 1 00 Jan 10 2008 Page 1296 of 1658 REJ09B0261 0100 ...
Страница 1482: ...28 General Purpose I O Ports GPIO Rev 1 00 Jan 10 2008 Page 1452 of 1658 REJ09B0261 0100 ...
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