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HSMMC CONTROLLER
S3C2416X RISC MICROPROCESSOR
20-32
Name
Bit
Description
Initial Value
BUFWTRDY [10]
Buffer Write Enable
(ROC)
This status is used for non-DMA write transfers. The Host Controller
can implement multiple buffers to transfer data efficiently. This read
only flag indicates if space is available for write data. If this bit is 1,
data can be written to the buffer. A change of this bit from 1 to 0
occurs when all the block data is written to the buffer. A change of
this bit from 0 to 1 occurs when top of block data can be written to
the buffer and generates the
Buffer Write Ready
interrupt.
1 = Write enable
0 = Write disable
0
RDTRANACT [9]
Read Transfer Active
(ROC)
This status is used for detecting completion of a read transfer.
This bit is set to 1 for either of the following conditions:
(1) After the end bit of the read command.
(2) When writing a 1 to
Continue Request
in the
Block Gap Control
register to restart a read transfer.
This bit is cleared to 0 for either of the following conditions::
(1) When the last data block as specified by block length is
transferred to the System.
(2) When all valid data blocks have been transferred to the System
and no current block transfers are being sent as a result of the
Stop
At Block Gap Request
being set to 1.
A Transfer Complete
interrupt is generated when this bit changes to 0.
1 = Transferring data
0 = No valid data
0
WTTRANACT [8]
Write Transfer Active
(ROC)
This status indicates a write transfer is active. If this bit is 0, it means
no valid write data exists in the Host Controller.
This bit is set in either of the following cases:
(1) After the end bit of the write command.
(2) When writing a 1 to
Continue Request
in the
Block Gap Control
register to restart a write transfer.
This bit is cleared in either of the following cases:
(1) After getting the CRC status of the last data block as specified by
the transfer count (Single and Multiple)
(2) After getting the CRC status of any block where data
transmission is about to be stopped by a
Stop At Block Gap
Request
.
During a write transaction, a
Block Gap Event
interrupt is
generated when this bit is changed to 0, as result of the
Stop At
Block Gap Request
being set. This status is useful for the Host
Driver in determining when to issue commands during write busy.
1 = Transferring data
0 = No valid data
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 ...