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參數(shù)資料
| 型號(hào)： | MX53L06402L-50 |
| 廠商： | MACRONIX INTERNATIONAL CO LTD |
| 元件分類： | PROM |
| 英文描述： | FLASH 2.7V PROM CARD, XMA7 |
| 封裝： | CRAD-7 |
| 文件頁數(shù)： | 27/55頁 |
| 文件大?。?/td> | 262K |
| 代理商： | MX53L06402L-50 |
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33
P/N: PM1043
REV. 1.0, NOV. 25, 2003
MX53L06402
7.6 SPI Mode Transaction Packets
7.6.1 Command Tokens
Command Format
All the MultiMedia card commands are 6 bytes long. The command transmission always starts with the left bit of the
bitstring corresponding to the command codeword. All commands are protected by a CRC (see Chapter 8.1). The
commands and arguments are listed in Table 24.
Bit position
47
46
[45:40]
[39:8]
[7:1]
0
Width (bits)
1
1632
7
1
Value
'0'
'1'
x
'1'
Description
start bit
transmission bit
command index
argument
CRC7
end bit
Command Classes
As in MultiMediaCard mode, the SPI commands are divided into several classes (See Table 23). Each class supports
a set of card functions. A MultiMediaCard will support the same set of optional command classes in both
communication modes (there is only one command class table in the CSD register). The available command classes,
and the supported command for a specific class, however, are different in the MultiMediaCard and the SPI
communication mode.
Card CMD
Class Description
Supported commands
Class(CCC)
0 1 9 10 12 13 16 17 18 23 24 27 28 29 30 32 33 34 35 36 37 38 42 55 56 58 59
class 0
Basic
++ ++
+ +
+
class 1
Not supported in SPI
class 2
Block read
+ + + +
class 3
Not supported in SPI
Table 23: Command classes in SPI mode
Detailed Command Description
The following table provides a detailed description of the SPI bus commands. The responses are defined in Chapter
7.6.2. Table 24 lists all MultiMediaCard commands. A "yes" in the SPI mode column indicates that the command is
supported in SPI mode. With these restrictions, the command class description in the CSD is still valid. If a command
does not require an argument, the value of this field should be set to zero. The reserved commands are also reserved
in MultiMediaCard mode.
The binary code of a command is defined by the mnemonic symbol. As an example, the content of the command
index field is (binary) '000000' for CMD0 and '100111' for CMD39.
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