Section 19 Multimedia Card Interface (MCIF)
Rev. 3.00 Jan 25, 2006 page 679 of 872
REJ09B0286-0300
19.6.2
Commands with Read Data
Commands with read data confirm the MMC status by the command responses, and then receive
MMC information and flash memory data.
The number of bytes of flash memory to be read is a block size specified by CMD16.
When block size > receive data FIFO size, the command sequence is suspended by FIFO full.
When the command sequence is suspended, data in the receive data FIFO is processed, and the
command sequence is then continued.
Figures 19.20 and 19.21 show examples of the command sequence for commands with read data.
Figure 19.22 shows the operational flow for commands with read data.
•
Settings needed to issue a command are made.
•
The START bit in CMDSTRT is set to 1 to start command transmission. The CS signal goes
low (select). Command transmission complete can be confirmed by the command transmission
end interrupt (CMDI).
•
The command response is received from the MMC. If the MMC does not return the command
response, the command response is detected by the command timeout error (CTERI).
•
Read data is received from the MMC.
•
Command abortion is detected according to the receive data FIFO full by the FIFO full
interrupt (FFI). To continue the command sequence, the RD_CONTI bit in OCR should be set
to 1.
•
When the command sequence ends, the CS signal goes high (not select). The end of the
command sequence is detected by poling the BUSY flag in CSTR or by the data transfer end
interrupt (DTI).
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 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Страница 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
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...