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SMS01GAF 데이터시트(PDF) 16 Page - Numonyx B.V

부품명 SMS01GAF
상세설명  64 MByte, 128 MByte, 256 MByte 512 MByte and 1 GByte, 3.3V Supply Secure Digital??Card
PDF  61 Pages
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제조업체  NUMONYX [Numonyx B.V]
홈페이지  http://www.numonyx.com
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SMS01GAF 데이터시트(HTML) 16 Page - Numonyx B.V

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Secure digital memory card interface
SMSxxxAF, SMSxxxFF, SMSxxxBF
16/61
Figure 4.
Secure Digital Memory Card system bus topology
1.
DAT1 and DAT2 not connected.
3.2
SD bus protocol
Communication over the SD bus is based on command and data bit streams which are
initiated by a start bit and terminated by a stop bit.
●
Command: a command is a token which starts an operation. A command is sent from
the host either to a single card (addressed command) or to all connected cards
(broadcast command). Commands are transferred serially on the CMD line. See
Figure 5: "No Response" and "No Data" operations.
The Command token format is shown in Figure 8
●
Response: a response is a token which is sent from an addressed card, or
(simultaneously) from all connected cards, to the host, as an answer to a previously
received command. Responses are transferred serially on the CMD line. A response is
illustrated in Figure 5: "No Response" and "No Data" operations.
The Response token format is shown in Figure 9
●
Data: data can be transferred from the card to the host or from the host to the card.
Data is transferred via the data lines. See Figure 6: (Multiple) Block Read operation for
an illustration.
The Data Packet format is shown in Figure 10
Card addressing is implemented using a session address assigned to the card during the
initialization phase (See SD Memory Card Specification, Chapter 4). The basic transaction
on the SD bus is the command/response transaction. In this type of bus transactions, the
information is directly transferred within the command or response structure. In addition,
some operations have a data token. Data transfers to/from the SD Memory Card are done in
blocks. Data blocks are always followed by CRC bits.
Single and Multiple Block operations are supported. Note that the Multiple Block operation
mode improves the speed of write operations. A Multiple Block transmission is terminated by
issuing a STOP_TRANSMISSION command on the CMD line (See Figure 6 and Figure 7).
CLK
VDD
VSS
DAT0-DAT3(A)
CMD(A)
CLK
VDD
VSS
DAT0-DAT3 CMD
SD Memory
Card (A)
CLK
VDD
VSS
DAT0-DAT3 CMD
SD Memory
Card (B)
DAT0-DAT3(B)
CMD(B)
CLK
VDD
VSS
DAT0, CS, CMD(1)
DAT0-DAT3(C)
CMD(C)
MultiMediaCard
(C)
ai10029
HOST



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