參數(shù)資料
型號: 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)
文件頁數(shù): 76/79頁
文件大?。?/td> 516K
代理商: FLAS00XX
MultiMediaCard Flash
Preliminary MultiMediaCard Product Manual;
1998 SANDISK CORPORATION
Page 76 of 79
6.2.2.4 Data Response
Every data block written to the card will be acknowledged by a data response token. It is
one byte long and have the following format:
7
6
0
x
x
x
0
Status
1
The status bits may be:
‘010’ - Data accepted.
‘101’ - Data rejected due to a CRC error.
6.2.3 Data Tokens
Read and write commands have data transfers associated with them. Data is being
transmitted or received via data tokens. All data bytes are transmitted MSB.
Data tokens are 4 to 515 bytes long and have the following format:
Byte 1: Start Byte
7
0
1
1
1
1
1
1
1
0
Bytes 2-513 (depends on the data block length): User data
Last two bytes: 16 bit CRC.
6.2.4 Data Error Token
If a read operation fails and the card cannot provide the required data it will sent a data
error token, instead. This token is one byte long and has the following format:
Figure 6-7 Data Error Token
The 4 LSBs are the same error bits as in response format R2.
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