MC2GH256NMCA-2SA00 SAMSUNG [Samsung semiconductor], MC2GH256NMCA-2SA00 Datasheet - Page 73

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

• Data transfer mode.
After a card receives its RCA it will switch to data transfer mode. In this mode the CMD line is driven with push-pull drivers.
The command is followed by a period of two Z bits (allowing time for direction switching on the bus) and than by P bits
pushed up by the responding card. This timing diagram is relevant for all responded host commands except CMD1,2,3:
CMD
• R1b Responses
Some commands, like CMD6, may assert the BUSY signal after responding with R1. If the busy signal is asserted, it is
done two clock cycles after the end bit of the command. the DAT0 line is driven low, DAT1-DAT7 lines are driven by the
card though their value is not relevant.
CMD
DAT0
DAT1-7 Z Z Z Z Z Z Z Z Z Z Z Z X
• Last Card Response - Next Host Command Timing
After receiving the last card response, the host can start the next command transmission after at least N
This timing is relevant for any host command.
CMD
• Last Host Command - Next Host Command Timing
After the last command has been sent, the host can continue sending the next command after at least N
If the ALL_SEND_CID command is not responded by the card after N
no card present in the bus.
CMD
Revision 0.3
←⎯⎯ Host Command ⎯⎯→
S T
Z Z Z Z Z Z Z Z Z Z Z Z S L
←⎯⎯ Host Command ⎯⎯→ ←⎯N
←⎯⎯ Host Command ⎯⎯→ ←⎯N
S T
S T
S T
←⎯⎯⎯ Response ⎯⎯⎯→ ←⎯N
Figure 6-11 : Timing Response End To Next Command Start (Data Transfer Mode)
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Figure 6-9 : Command Response Timing (Data Transfer Mode)
Figure 6-12 : Timing Of Command Sequences (All Modes)
CRC E Z Z Z Z Z * * * * * * * * * * * * * * * * * * * * Z Z Z Z Z
CRC E Z Z P * * * P S T
CRC E Z
CRC E Z
←N
Figure 6-10 : R1b Response Timing
ST
→
←⎯⎯⎯⎯⎯⎯⎯⎯ Card Is Busy ⎯⎯⎯⎯⎯⎯⎯→
CR
CR
CC
* * *
* * *
cycles ⎯→ ←⎯⎯ Response ⎯⎯⎯→
cycles ⎯→ ←⎯⎯ Host Command ⎯⎯→
cycles ⎯→ ←⎯⎯ Host Command ⎯⎯→
* * * * * * * * * * * * * * * * * * * * * * * *
* * * * * * * * * * * * * * * * * * * * * *
Z S T
Z S T
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ID
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+ 1 clock periods, the host can conclude there is
CRC E Z Z Z
CRC E Z Z
CRC E Z Z
MultiMediaCard
X Z Z Z
E Z Z Z
RC
CC
Sep.22.2005
clock cycles.
clock periods.
TM