Section 19 Multimedia Card Interface (MCIF)
Rev. 3.00 Jan 25, 2006 page 675 of 872
REJ09B0286-0300
19.6
Operations in SPI Mode
SPI mode is an operating mode in which the transfer clock is output from the MCCLK pin, and
command/response/data is input/output via the MCRxD pin and MCTxD pin.
In SPI mode, one of multiple MMCs is selected by the chip select (CS) pin. Therefore, card
selection using broadcast commands for MMC mode is not supported. In SPI mode, data response
to write data is supported.
19.6.1
Operation of Commands without Data Transfer
Commands without data transfer execute the desired data transfer using command arguments and
command responses. For a command that is related to time-consuming processing such as flash
memory write/erase, the MMC displays the data busy state.
Figures 19.17 and 19.18 show examples of the command sequence for commands without data
transfer. Figure 19.19 shows the operational flow for commands without data transfer.
•
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).
•
A 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).
•
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 command output
end interrupt (CRPI).
•
The end of the data busy state is detected by poling the DTBUSY flag in CSTR or by the data
busy end interrupt (DBSYI).
Summary of Contents for H8S/2158
Page 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Page 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Page 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
Page 54: ...Rev 3 00 Jan 25 2006 page lii of lii...
Page 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Page 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
Page 126: ...Section 4 Exception Handling Rev 3 00 Jan 25 2006 page 72 of 872 REJ09B0286 0300...
Page 198: ...Section 6 Bus Controller Rev 3 00 Jan 25 2006 page 144 of 872 REJ09B0286 0300...
Page 326: ...Section 10 8 Bit PWM Timer PWM Rev 3 00 Jan 25 2006 page 272 of 872 REJ09B0286 0300...
Page 440: ...Section 15 Watchdog Timer WDT Rev 3 00 Jan 25 2006 page 386 of 872 REJ09B0286 0300...
Page 606: ...Section 17 I 2 C Bus Interface IIC Rev 3 00 Jan 25 2006 page 552 of 872 REJ09B0286 0300...
Page 742: ...Section 19 Multimedia Card Interface MCIF Rev 3 00 Jan 25 2006 page 688 of 872 REJ09B0286 0300...
Page 750: ...Section 21 D A Converter Rev 3 00 Jan 25 2006 page 696 of 872 REJ09B0286 0300...
Page 768: ...Section 22 A D Converter Rev 3 00 Jan 25 2006 page 714 of 872 REJ09B0286 0300...
Page 770: ...Section 23 RAM Rev 3 00 Jan 25 2006 page 716 of 872 REJ09B0286 0300...
Page 824: ...Section 26 Clock Pulse Generator Rev 3 00 Jan 25 2006 page 770 of 872 REJ09B0286 0300...
Page 844: ...Section 27 Power Down Modes Rev 3 00 Jan 25 2006 page 790 of 872 REJ09B0286 0300...
Page 878: ...Section 28 List of Registers Rev 3 00 Jan 25 2006 page 824 of 872 REJ09B0286 0300...
Page 926: ...Index Rev 3 00 Jan 25 2006 page 872 of 872 REJ09B0286 0300...