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SPD6722QCCE 参数 Datasheet PDF下载

SPD6722QCCE图片预览
型号: SPD6722QCCE
PDF下载: 下载PDF文件 查看货源
内容描述: ISA到PC卡( PCMCIA )控制器 [ISA-to-PC-Card (PCMCIA) Controllers]
分类和应用: 总线控制器微控制器和处理器PC
文件页数/大小: 138 页 / 837 K
品牌: INTEL [ INTEL ]
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ISA-to-PC-Card (PCMCIA) Controllers PD6710/22  
6.0  
Operation Registers  
The PD67XX internal registers are accessed through a pair of Operation registers an Index  
register and a Data register. The Index register is accessed at address 03E0h, and the Data register  
is accessed at 03E1h.  
6.1  
Index  
Register Name: Index  
Index: n/a  
Register Per: chip  
Register Compatibility Type: 365  
Bit 7  
Bit 6  
Bit 5  
Bit 4  
Bit 3  
Bit 2  
Bit 1  
Bit 0  
Device Index Socket Index  
Register Index  
RW:0  
RW:0  
RW:000000  
The Data register is accessed at 03E1h.  
Bits 5:0 Register Index  
These bits determine which of the 64 possible socket-specific registers will be accessed when the  
Data register is next accessed by the processor. Note that some values of the Register Index field  
are reserved (see Table 11 on page 42).  
Bit 6 Socket Index  
This bit determines which set of socket-specific registers is currently selected. When this bit is 0,  
a Socket A register is selected. When this bit is 1, a Socket B register is selected. Note that the  
PD6710 supports one socket, and the PD6722 supports two sockets.  
Bit 7 Device Index  
In systems where two PD67XXs are used, this bit differentiates between them.  
The Index register value determines which internal register should be accessed (read or written) in  
response to each CPU access of the Data register. Each of the possible PC Card sockets is allocated  
64 of the 256 locations in the internal register index space  
Datasheet  
41  
 
 
 
 
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