參數(shù)資料
型號(hào): flas00xx
廠商: SIEMENS AG
英文描述: MultiMediaCard(多媒體卡)
中文描述: 多媒體卡(多媒體卡)
文件頁(yè)數(shù): 52/79頁(yè)
文件大?。?/td> 516K
代理商: FLAS00XX
MultiMediaCard Flash
Preliminary MultiMediaCard Product Manual;
1998 SANDISK CORPORATION
Page 52 of 79
R5
(Interrupt request): code length 48 bits. If the response is generated by the host, the
RCA field in the argument shall be 0x0.
Bit Position
47
46
[45:40]
[39:8]
Argument field
[7:1]
0
Width (bits)
1
1
6
16
16
7
1
Value
‘0’
‘0’
‘101000’
x
x
x
‘1’
Description
start bit
trans-mission
bit
CMD40
RCA [31:16] of
winning card or
of the host
[15:0] Not
defined. May
be used for IRQ
data
CRC7
end bit
5.8 Card Register
There are a set of five registers within the card interface. These registers are used for the
serial data communication. The OCR, CID and CSD registers carry the card/content
specific information, while the RCA and DSR registers are configuration registers storing
actual configuration parameters.
5.8.1 OCR Register
The 32-bit operation conditions register stores the V
DD
voltage profile of the card. In
addition this register includes a status information bit. This status bit informs the host that
the card power up procedure is already finished. The OCR register (as well as command
1) must be implemented by cards which do not support the full operating voltage range of
the MultiMediaCard bus or the card power up extends the definition defined in the timing
diagram.
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