S3C2416X RISC MICROPROCESSOR
HSMMC CONTROLLER
20-31
Name
Bit
Description
Initial Value
0 = Reset or Debouncing
INSCARD [16]
Card Inserted
(RO)
This bit indicates whether a card has been inserted. The Host
Controller shall debounce this signal so that the Host Driver will not
need to wait for it to stabilize. Changing from 0 to 1 generates a
Card Insertion
interrupt in the
Normal Interrupt Status
register and
changing from 1 to 0 generates a
Card Removal
interrupt in the
Normal Interrupt Status
register. The
Software Reset For All
in the
Software Reset
register shall not affect this bit. If a card is removed
while its power is on and its clock is oscillating, the Host Controller
shall clear
SD Bus Power
in the
Power Control
register and
SD
Clock Enable
in the
Clock Control
register.
When this bit is changed from 1 to 0, the Host Controller shall
immediately stop driving
CMD
and
DAT[3:0]
(tri-state). In addition,
the Host Driver should clear the Host Controller by the
Software
Reset For All
in
Software Reset
register. The card detect is active
regardless of the
SD Bus Power
.
1 = Card Inserted
0 = Reset or Debouncing or No Card
0
[15:14]
Reserved
DIFF4W [13]
FIFO Pointer Difference 4-Word (ROC)
When the difference of the address pointer between AHB side and
SD side is more than or equal to 4-word, this status bit is set to
HIGH. When others clears automatically.
Write(Tx) mode : when this bit is HIGH, more than or equal to 4-
word can be written by CPU side.
Read(Rx) mode : when this bit is HIGH, more than or equal to 4-
word can be read by CPU side.
0
DIFF1W [12]
FIFO Pointer Difference 1-Word (ROC)
When the difference of the address pointer between AHB side and
SD side is more than or equal to 1-word, this status bit is set to
HIGH. When others clears automatically.
Write(Tx) mode : when this bit is HIGH, more than or equal to 1-
word can be written by CPU side.
Read(Rx) mode : when this bit is HIGH, more than or equal to 1-
word can be read by CPU side.
0
BUFRDRDY [11]
Buffer Read Enable
(ROC)
This status is used for non-DMA read transfers. The Host Controller
may implement multiple buffers to transfer data efficiently. This read
only flag indicates that valid data exists in the host side buffer status.
If this bit is 1, readable data exists in the buffer. A change of this bit
from 1 to 0 occurs when all the block data is read from the buffer. A
change of this bit from 0 to 1 occurs when block data is ready in the
buffer and generates the
Buffer Read Ready
interrupt.
1 = Read enable
0 = Read disable
0
Содержание S3C2416
Страница 33: ...S3C2416X RISC MICROPROCESSOR PRODUCT OVERVIEW 1 5 3 BLOCK DIAGRAM Figure 1 1 S3C2416X Block Diagram ...
Страница 38: ...PRODUCT OVERVIEW S3C2416X RISC MICROPROCESSOR 1 10 153 AIN 1 U14 195 EINT 10 GPG2 K15 237 SDATA 14 C18 ...
Страница 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Страница 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Страница 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Страница 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Страница 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Страница 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Страница 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Страница 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Страница 455: ...S3C2416X RISC MICROPROCESSOR HSMMC CONTROLLER 20 9 4 9 SD COMMAND ISSUE SEQUENCE Figure 20 9 Timeout Setting Sequence ...
Страница 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Страница 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Страница 653: ...S3C2416X RISC MICROPROCESSOR ELECTRICAL DATA 26 15 Figure 26 14 SDRAM READ WRITE Timing Trp 2 Trcd 2 Tcl 2 DW 16 bit ...
Страница 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...
Страница 672: ...MECHANICAL DATA S3C2416X RISC MICROPROCESSOR 30 2 Figure 27 2 330 FBGA 1414 Package Dimension 2 Bottom View ...