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PCI6421 参数 Datasheet PDF下载

PCI6421图片预览
型号: PCI6421
PDF下载: 下载PDF文件 查看货源
内容描述: 双/单插槽的CardBus和UltraMedia控制器 [DUAL/SINGLE SOCKET CARDBUS AND ULTRAMEDIA CONTROLLER]
分类和应用: 控制器
文件页数/大小: 204 页 / 849 K
品牌: TI [ TEXAS INSTRUMENTS ]
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9.16 Maximum Latency Register  
The maximum latency register contains the maximum latency value for the Smart Card controller core.  
Bit  
7
6
5
4
3
2
1
0
Name  
Type  
Default  
Maximum latency  
RU  
0
RU  
0
RU  
0
RU  
0
RU  
0
RU  
1
RU  
0
RU  
0
Register:  
Offset:  
Type:  
Maximum latency  
3Eh  
Read/Update  
04h  
Default:  
Table 9−9. Maximum Latency Register Description  
BIT  
FIELD NAME  
TYPE  
DESCRIPTION  
7−0  
MAX_LAT  
RU  
Maximum latency. The contents of this field may be used by host BIOS to assign an arbitration priority level  
to the Smart Card controller. The default for this register indicates that the Smart Card controller may need  
to access the PCI bus as often as every 0.25 µs; thus, an extremely high priority level is requested. The  
contents of this field may also be loaded through the serial EEPROM.  
9.17 Capability ID and Next Item Pointer Registers  
The capability ID and next item pointer register identifies the linked-list capability item and provides a pointer to the  
next capability item. See Table 9−10 for a complete description of the register contents.  
Bit  
15  
14  
13  
12  
11  
10  
9
8
7
6
5
4
3
2
1
0
Name  
Type  
Default  
Capability ID and next item pointer  
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
0
R
1
Register:  
Offset:  
Type:  
Capability ID and next item pointer  
44h  
Read-only  
0001h  
Default:  
Table 9−10. Capability ID and Next Item Pointer Registers Description  
BIT  
FIELD NAME  
TYPE  
DESCRIPTION  
15−8  
NEXT_ITEM  
R
Next item pointer. The Smart Card controller supports only one additional capability, PCI power  
management, that is communicated to the system through the extended capabilities list; therefore,  
this field returns 00h when read.  
7−0  
CAPABILITY_ID  
R
Capability identification. This field returns 01h when read, which is the unique ID assigned by the PCI  
SIG for PCI power-management capability.  
9−10  
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