HSMMC CONTROLLER
S3C2416X RISC MICROPROCESSOR
20-30
5.10 PRESENT STATE REGISTER
This register contains the SD Command Argument.
Register
Address
R/W
Description
Reset Value
PRNSTS0 0X4AC00024
RO/ROC
Present State Register (Channel 0)
0x000A0000
PRNSTS1 0X4A800024
RO/ROC
Present State Register (Channel 1)
0x000A0000
Name
Bit
Description
Initial Value
[31:25]
Reserved
0
PRNTCMD [24]
CMD Line Signal Level
(RO)
This status is used to check the
CMD
line level to recover from
errors, and for debugging.
Note:
CMD
port is mapped to
SDx_CMD
pin
0
PRNTDAT [23:20]
DAT[3:0] Line Signal Level
(RO)
This status is used to check the
DAT
line level to recover from
errors, and for debugging. This is especially useful in detecting the
busy signal level from
DAT
[0].
D23 = DAT[3]
D22 = DAT[2]
D21 = DAT[1]
D20 = DAT[0]
Note:
DAT
port is mapped to
SDx_DAT
pin
Line
State
PRNTWP [19]
Write Protect Switch Pin Level
(RO)
The Write Protect Switch is supported for memory and combo cards.
This bit reflects the
SDWP#
pin.
1 = Write enabled (
SDWP#
=1)
0 = Write protected (
SDWP#
=0)
Note:
SDWP#
port is fixed to High.
1
PRNTCD [18]
Card Detect Pin Level
(RO)
This bit reflects the inverse value of the
SDCD#
pin. Debouncing is
not performed on this bit. This bit may be valid when
Card State
Stable
is set to 1, but it is not guaranteed because of propagation
delay. Use of this bit is limited to testing since it must be debounced
by software.
1 = Card present (
SDCD#
=0)
0 = No card present (
SDCD#
=1)
Note:
SDCD#
port is fixed to LOW.
Line
State
STBLCARD [17]
Card State Stable
(RO)
This bit is used for testing. If it is 0, the
Card Detect Pin Level
is not
stable. If this bit is set to 1, it means the
Card Detect Pin Level
is
stable. No Card state can be detected by this bit is set to 1 and
Card
Inserted
is set to 0. The
Software Reset For All
in the
Software
Reset
register shall not affect this bit.
1 = No Card or Inserted
1
(After Reset)
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 ...