MC2GH256NMCA-2SA00 SAMSUNG [Samsung semiconductor], MC2GH256NMCA-2SA00 Datasheet - Page 77

• Manufacturer Part Number: MC2GH256NMCA-2SA00
• Description: SAMSUNG MultiMediaCard
• Manufacturer: SAMSUNG [Samsung semiconductor]

CMD
DAT0
DAT1-7 X X
CMD
DAT0
DAT1-7 Z Z Z Z Z Z Z Z Z Z Z X X
• Erase, Set and Clear Write Protect Timing
The host must first select the erase groups to be erased using the erase start and end command (CMD35, CMD36). The
erase command (CMD38), once issued, will erase all selected erase groups. Similarly, set and clear write protect com-
mands start a programming operation as well. The card will signal “busy” (by pulling the DAT0 line low) for the duration of
the erase or programming operation. The bus transaction timings are identical to the variation of the stop transmission
described in Figure 6-20.
• Reselecting a busy card
When a busy card which is currently in the dis state is reselected it will reinstate its busy signaling on the data line DAT0.
The timing diagram for this command / response / busy transaction is given in Figure 6-20.
After reaching the Tran-state a host can initiate the Bus Testing procedure. If there is no response to the CMD19 sent by
the host, the host should read the status from the card with CMD13. If there was no response to CMD19, the host may
assume that this function is not supported by the card.
CMD
DAT0
DAT1
DAT2
DAT3
DAT4-7
6.15 Bus Test Procedure Timing
Revision 0.3
←⎯⎯ Host Command ⎯→ ←⎯ N
←⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯ Busy (Card is programming) ⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯⎯→
←⎯⎯ Host Command ⎯→ ←⎯ N
CMD19
S T
L L
S T
Z Z Z Z Z Z Z Z Z Z Z S L
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Figure 6-19 : Stop Transmission After Last Data Block. Card Is Busy Programming.
content
content
RSP19
Figure 6-20 : Stop Transmission After Last Data Block. Card Becomes Busy.
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
←
CRC E Z Z P * * * P S T
CRC E Z Z P * * * P S T
N
WR
→
Figure 6-21: 4 bit System Bus Testing Procedure
Z Z * * * Z Z Z
S 10 X X X E
S 01 X X X E
S 10 X X X E
S 01 X X X E
←N
ST
→
CR
CR
←⎯⎯⎯⎯⎯ Busy (Card is programming) ⎯⎯⎯⎯⎯→
Cycles → ←⎯⎯ Card Response ⎯⎯→
Cycles → ←⎯⎯ Card Response ⎯⎯→
←N
* * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * *
RC
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
→
CMD14
77
content
content
RSP14
←N
AC
CRC E Z Z P P P P S T
CRC E Z Z P P P P S T
→
S 01 000000 CRC16 E
S 10 000000 CRC16 E
S 01 000000 CRC16 E
S 10 000000 CRC16 E
S 00 000000 CRC16 E
Stuff bits
X X Z Z Z Z Z Z Z Z
X X Z Z Z Z Z Z Z Z
L E Z Z Z Z Z Z Z Z
L E Z Z Z Z Z Z Z Z
MultiMediaCard
Optional
←⎯ Host Cmnd
←⎯ Host Cmnd
Sep.22.2005
←N
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
Z Z * * * * * * * Z Z Z
RC
→
Content
Content
CMD6
TM
RSP6