Section 19 Multimedia Card Interface (MCIF)
Rev. 3.00 Jan 25, 2006 page 642 of 872
REJ09B0286-0300
Bit
Bit Name
Initial Value
R/W
Description
4
DATAEN
0
R/W
Data Enable
Read as 1 during data transfer period after 1 is
written. Otherwise, read as 0. Starts write data
transmission by a command with write data.
Resumes transfer clock output and write data
transmission when the transfer clock is halted
according to FIFO empty or termination of one
block writing in multiblock write.
Write enable period:
•
After transmission of a command with write
data
•
While transfer clock is halted according to
FIFO empty
•
When one block writing in multiblock write
is terminated
0: Operation is not affected.
1: Starts or resumes transfer clock output and
write data transmission.
3 to
0
—
All 0
R/(W)
Reserved
The initial value should not be changed.
The command sequence on the MMC side may be halted according to the status of MMC. Table
19.5 shows the MMC states in which the command sequence is halted. In this case, the command
sequence should be aborted by setting the CMDOFF bit to 1 on the MCIF side as required.
Table 19.5 Card States in which Command Sequence Is Halted
Operating Mode
Error Status
Command response
When the error detection bit in the card status (32 bits) in the
command response transmitted by the MMC is set.
MMC mode
Data status
When the error detection bit in the CRC status (3 bits) to be
transmitted from the MMC while block data is transmitted to
the MMC is set.
Command response
When the error detection bit in the card status (8 bits) in the
command response transmitted by the MMC is set.
SPI mode
Data response
When the error detection bit in the data response (8 bits) to
be transmitted from the MMC while block data is transmitted
to the MMC is set.
Содержание H8S/2158
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Страница 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
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Страница 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Страница 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Страница 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Страница 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Страница 744: ...Section 20 Encryption Operation Circuit DES and GF Rev 3 00 Jan 25 2006 page 690 of 872 REJ09B0286 0300...
Страница 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Страница 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Страница 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Страница 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Страница 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Страница 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Страница 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...