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參數(shù)資料
| 型號： | UM_S3C49F9X |
| 廠商： | SAMSUNG SEMICONDUCTOR CO. LTD. |
| 英文描述： | S3C49F9X User’s Manual |
| 中文描述： | S3C49F9X用戶手冊 |
| 文件頁數(shù)： | 34/74頁 |
| 文件大小： | 653K |
| 代理商： | UM_S3C49F9X |
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S3C49F9X SOLID DISK CONTROLLER CARD CONFIGURATION
33
4.4 Pin Replacement Register (Address 204h in attribute memory)
Operation
D7
D6
D5
D4
D3
D2
D1
D0
Read
0
0
CRdy/-Bsy
CWProt
0
0
Rdy/-Bsy
WProt
Write
0
0
CRdy/-Bsy
CWProt
0
0
MRdy/-Bsy
MWProt
CRdy/-Bsy
written by the host.
CWProt
by the host.
Rdy/-Bsy
used to determine the state of the Ready/-Busy as this pin has been reallocated for use as Interrupt
Request on an I/O card. When written, this bit acts as a mask for writing the corresponding bit CRdy/-Bsy.
WProt
This bit is always zero (0) since the PC Card does not have a Write Protect switch.
When written, this bit acts as a mask for writing the corresponding bit CWProt.
MRdy/-Bsy
This bit acts as a mask for writing the corresponding bit CRdy/-Bsy.
MWProt
This bit when written acts as a mask for writing the corresponding bit CWProt.
Table 4-5 Pin Replacement Changed Bit/Mask Bit Values
This bit is set to one (1) when the bit RRdy/-Bsy changes state. This bit can also be
This bit is set to one (1) when the RWprot changes state. This bit may also be written
This bit is used to determine the internal state of the Rdy/-Bsy signal. This bit may be
Initial Value
Written by Host
Final
Command
of (C) Status
"C" Bit
×
×
0
"M" Bit
"C" Bit
0
0
0
Unchanged
1
×
×
0
1
Unchanged
1
0
Cleared by Host
1
1
1
Set by Host
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