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| 型號： | rosa51 |
| 廠商： | SIEMENS AG |
| 英文描述： | MultiMediaCard Adapter(多媒體卡適配器) |
| 中文描述： | 多媒體卡（多媒體卡適配器） |
| 文件頁數(shù)： | 15/54頁 |
| 文件大?。?/td> | 510K |
| 代理商： | ROSA51 |
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Siemens AG Semiconductors
Version 5.2
Confidential
20/10/1998
15
adapter and can be read by the application with a special adapter command. Some operations
include the response as part of the data portion.
The application may start a new operation without completing the previous one. It is responsible to
prevent data corruption. The adapter will terminate the involved MultiMediaCard bus operation
according to the bus protocol.
Thereby no adapter interface bus protocol is defined atop of that of a simple byte transfer.
3,1V
'LUHFWLRQ
'HVFULSWLRQ
DATA[7:0]
CD
RW
CS_N
ACK_N
IN/OUT
IN
IN
IN
OUT
Multiplexed, bidirectional data and control bus
Control/data select signal for data bus
Read/write select signal.
Chip select signal. active low.
Handshake signal to acknowledge a data transfer. During reads it
declares data on the bus valid, during writes it indicates that data has
been latched into the interface.
active low.
Handshake signal to mark the start and end of a transaction. During
writes it declares not only address and direction but also data as valid.
The transaction ends after deasserting
67%B1
. The
67%B1
-
$&.B1
handshake may be ignored if a synchronous controlling is used. The bus
master has to read the control register which reflects the busy or not
busy state of the adapter.
active low.
Interrupt signal to the bus master. An interrupt indicates an exception or
is the response to a previous command. The source of the interrupt can
be read and cleared via special adapter commands.
active low.
STB_N
IN
IRQ_N
OUT
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