Section 19 Multimedia Card Interface (MCIF)
Rev. 3.00 Jan 25, 2006 page 654 of 872
REJ09B0286-0300
Bit
Bit Name
Initial Value
R/W
Description
0
MMCPE
0
R/W
MCIF Pin Function Enable
Enables/disables input/output of all MCIF
input/output pins.
0: Disables all inputs/outputs.
1: Enables MCCLK, MCCMD/MCTxD,
MCDAT/MCRxD, MCCSA/MCDATDIR, and
MCCSB/MCCMDDIR pin inputs/outputs.
Outputs of the MCCSB and MCDATDIR and
MCCMDDIR pins are also disabled via the
SPCNUM bit and DIRME bit, respectively.
19.3.16 Transfer Clock Control Register (CLKON)
CLKON controls the transfer clock frequency and clock ON/OFF.
A 20-MHz system clock is needed, and bits CSEL2 to CSEL0 should be set to B'100 for a 20-
Mbps transfer clock according to the limitation of the maximum operating frequency of this LSI.
At this time, bits CSEL2 to CSEL0 should be cleared to B'000 for a 200-kbps transfer clock in the
open drain format output status in MMC mode.
Bit
Bit Name
Initial Value
R/W
Description
7
CLKON
0
R/W
Clock On
0: Fixes the transfer clock output from the
MCCLK pin to low.
1: Outputs the transfer clock from the MCCLK
pin.
6
to
3
—
All 0
R
Reserved
These bits are always read as 0 and cannot be
modified.
2
1
0
CSEL2
CSEL1
CSEL0
0
0
0
R/W
R/W
R/W
Transfer Clock Frequency Select
000: Uses
φ
/100 as a transfer clock.
001: Uses
φ
/8 as a transfer clock.
010: Uses
φ
/4 as a transfer clock.
011: Uses
φ
/2 as a transfer clock.
100: Uses
φ
as a transfer clock.
101 to 111: Setting prohibited
Содержание H8S/2158
Страница 10: ...Rev 3 00 Jan 25 2006 page viii of lii...
Страница 36: ...Rev 3 00 Jan 25 2006 page xxxiv of lii B Product Lineup 863 C Package Dimensions 864 Index 865...
Страница 47: ...Rev 3 00 Jan 25 2006 page xlv of lii Appendix Figure C 1 Package Dimensions TBP 112A 864...
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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...