HSMMC CONTROLLER
S3C2416X RISC MICROPROCESSOR
20-38
5.13 BLOCK GAP CONTROL REGISTER
This register contains the SD Command Argument.
Register
Address
R/W
Description
Reset Value
BLKGAP0
0X4AC0002A
R/W Block Gap Control Register (Channel 0)
0x0
BLKGAP1
0X4A80002A
R/W Block Gap Control Register (Channel 1)
0x0
Name
Bit
Description
Initial Value
[7:4]
Reserved
0
ENINTBGAP [3]
Interrupt At Block Gap
This bit is valid only in 4-bit mode of the SDIO card and selects a sample
point in the interrupt cycle. Setting to 1 enables interrupt detection at the
block gap for a multiple block transfer. Setting to 0 disables interrupt
detection during a multiple block transfer. If the SD card cannot signal
an interrupt during a multiple block transfer, this bit should be set to 0.
When the Host Driver detects an SD card insertion, it shall set this bit
according to the CCCR of the SDIO card. (RW)
1 = Enabled
0 = Disabled
0
ENRWAIT [2]
Read Wait Control
The read wait function is optional for SDIO cards. If the card supports
read wait, set this bit to enable use of the read wait protocol to stop read
data using the
DAT
[2] line. Otherwise the Host Controller has to stop the
SD Clock to hold read data, which restricts commands generation.
When the Host Driver detects an SD card insertion, it shall set this bit
according to the CCCR of the SDIO card. If the card does not support
read wait, this bit shall never be set to 1 otherwise
DAT
line conflict may
occur. If this bit is set to 0, Suspend/Resume cannot be supported. (RW)
1 = Enable Read Wait Control
0 = Disable Read Wait Control
0
CONTREQ [1]
Continue Request
This bit is used to restart a transaction which was stopped using the
Stop At Block Gap Request
. To cancel stop at the block gap, set
Stop
At Block Gap Request
to 0 and set this bit 1 to restart the transfer.
The Host Controller automatically clears this bit in either of the following
cases:
(1) In the case of a read transaction, the
DAT Line Active
changes from
0 to 1 as a read transaction restarts.
(2) In the case of a write transaction, the
Write Transfer Active
changes from 0 to 1 as the write transaction restarts.
Therefore it is not necessary for Host Driver to set this bit to 0. If
Stop At
Block Gap Request
is set to 1, any write to this bit is ignored. (RWAC)
1 = Restart
0 = Not affect
0
STOPBGAP [0]
Stop At Block Gap Request
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 ...