Section 19 Multimedia Card Interface (MCIF)
Rev. 3.00 Jan 25, 2006 page 655 of 872
REJ09B0286-0300
19.4
MCIF Activation
The MMC is an external storage media that can be disconnected. The MCIF controls data transfer
with the MMC, however, it cannot control insertion and ejection of the MMC successfully.
Firmware should be used to control insertion and ejection of the MMC by using an external
interrupt and general ports of this LSI.
19.4.1
Initial Status
The power supplied to the MMC is turned on or off by general port output of this LSI.
Inputs/outputs of the input/output pins such as MCCLK, MCCMD/MCTxD, MCDAT/MCRxD,
MCCSA/MCDATDIR, and MCCSB/MCCMDDIR are enabled/disabled by the MMCPE bit in
IOMCR. When the MMCPE bit is set to 1, the CLKON bit should be cleared to 0 so that the
transfer clock is applied after the other inputs/outputs are stabilized.
19.4.2
Activation Procedure
When MMC insertion is detected, the MCIF should be activated by the following procedures:
MMC Mode:
•
Enable power supply to the MMC by general port output.
•
Enable input/output signals by setting the MMCPE bit to 1.
•
Start transfer clock application by setting the CLKON bit to 1.
SPI Mode:
•
Enable power supply to the MMC by general port output.
•
Specify bits for SPCNUM and CHIPSA in IOMCR according to the number of MMC slots and
inserted MMCs.
•
Enable input/output signals by setting the MMCPE bit to 1.
•
Start transfer clock application by setting the CLKON bit to 1.
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 70: ...Section 1 Overview Rev 3 00 Jan 25 2006 page 16 of 872 REJ09B0286 0300...
Страница 118: ...Section 3 MCU Operating Modes Rev 3 00 Jan 25 2006 page 64 of 872 REJ09B0286 0300...
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...