參數(shù)資料
型號: HB28E016MM2
廠商: Hitachi,Ltd.
英文描述: MultiMediaCard 16 Mbyte/32 Mbyte/64 Mbyte/128 MByte
中文描述: 多媒體16 Mbyte/32 Mbyte/64 Mbyte/128字節(jié)
文件頁數(shù): 25/88頁
文件大?。?/td> 329K
代理商: HB28E016MM2
HB28E016/D032/D064/B128MM2
25
The command transmission always starts with the MSB. Each command starts with a start bit and ends with
a 7-bit CRC command protection field followed by an end bit. The length of each command frame is fixed
to 48 bits (2.4
μ
s at 20 MHz):
0
start bit
Note: 1. (Cyclic Redundancy Check)
1
host
1
end bit
bit5...bit0
command
bit31...bit0
argument
bit6...bit0
CRC*
1
The start bit is always ‘0’ in command frames (sent from host to MultiMediaCard). The host bit is always
‘1’ for commands. The command field contains the binary coded command number. The argument
depends on the command (refer to Table “Basic Commands (class 0) and Table “Block-Oriented Read
Commands (class 2)”). The CRC field is defined in Chapter “Cyclic Redundancy Check (CRC)”.
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