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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)
Summary of Contents for S3C2416
Page 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Page 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Page 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Page 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Page 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Page 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Page 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Page 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Page 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Page 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Page 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...