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SMS01GAF bảng dữ liệu(PDF) 23 Page - Numonyx B.V

tên linh kiện SMS01GAF
Giải thích chi tiết về linh kiện  64 MByte, 128 MByte, 256 MByte 512 MByte and 1 GByte, 3.3V Supply Secure Digital??Card
PDF  61 Pages
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nhà sản xuất  NUMONYX [Numonyx B.V]
Trang chủ  http://www.numonyx.com
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SMS01GAF bảng dữ liệu(HTML) 23 Page - Numonyx B.V

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SMSxxxAF, SMSxxxFF, SMSxxxBF
Secure digital memory card interface
23/61
Figure 12.
SD Memory Card State Diagram (Data Transfer Mode)
3.5
Commands
Four types of commands are used to control the SD Memory Card:
1.
Broadcast commands (bc), no response: The broadcast feature is available only if
all the CMD lines are interconnected at the level of the host. If they are not
interconnected then each individual card will accept the command in turn.
2.
Broadcast commands with response (bcr): Since there is no Open Drain mode in
SD Memory Cards, this type of command is used only if the host does not use a
common CMD line. The command is accepted by every individual Card and the
responses from all cards are sent simultaneously.
3.
addressed (point-to-point) commands (ac): There is no data transfer on DAT.
4.
addressed (point-to-point) data transfer commands (adtc): There is a data transfer
on DAT.
All commands have a fixed code length of 48 bits for a transmission time of 2.4µs at 20MHz.
All commands and responses are sent over the CMD line of the SD Memory Card.
Command transmission always starts with the most significant bit (MSB) of the command
codeword. All commands are protected by a CRC. All Command codewords are terminated
by the end bit (always '1'). Table 11 shows the command format. All commands and their
arguments are specified in the SD Memory Card Specification.
CMD3
CMD15
CMD0
Card Identification mode
Data Transfer mode
from all states
in Data Transfer mode
CMD13, CMD55
no state transition
in Data Transfer mode
Standby State
(stby)
CMD4,
CMD9
CMD10
"Operation
Complete"
Disconnect State
(dis)
CMD7
Programming
State (prg)
CMD7
CMD7
Transfer State
(tran)
CMD7
CMD28,
CMD29
CMD38
"Operation
Complete"
CMD24,CMD25
CMD26,CMD27
CMD42,CMD56(w)
Receive Data
State (rcv)
CMD12 or
Transfer End
CMD17,CMD18
CMD30,CMD56(r)
ACMD51
Sending Data
State (data)
CMD12,
"Operation
Complete"
ai10038



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