參數(shù)資料
型號: TSB82AA2I
廠商: Texas Instruments, Inc.
英文描述: 1394b OHCI-LYNX CONTROLLER
中文描述: 的1394b OHCI的山貓控制器
文件頁數(shù): 30/104頁
文件大?。?/td> 461K
代理商: TSB82AA2I
310
3.11 CardBus CIS Base Address Register
The TSB82AA2 device may be configured to support CardBus registers via bit 6 (CARDBUS) in the PCI
miscellaneous configuration register at offset F0h in the PCI configuration space (see Section 3.23,
Miscellaneous
Configuration Register
). If CARDBUS is low (default), then this 32-bit register returns 0s when read. If CARDBUS
is high, then this register is to be programmed with a base address referencing the memory-mapped card information
structure (CIS). This register must be programmed with a nonzero value before the CIS may be accessed. See
Table 310 for a complete description of the register contents.
Bit
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
16
Name
CardBus CIS base address
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
CardBus CIS base address
Type
R/W
R/W
R/W
R/W
R/W
R
R
R
R
R
R
R
R
R
R
R
Default
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Register:
Type:
Offset:
Default:
CardBus CIS base address
Read/Write, Read-only
18h
0000 0000h
Table 310. CardBus CIS Base Address Register Description
BIT
FIELD NAME
TYPE
DESCRIPTION
3111
CIS_BASE
R/W
CIS base address. This field specifies the upper 21 bits of the 32-bit CIS base address. If CARDBUS is
sampled high on a G_RST, then this field is read-only, returning 0s when read.
104
CIS_SZ
R
CIS address space size. This field returns 0s when read, indicating that the CIS space requires a
2K-byte region of memory.
3
CIS_PF
R
CIS prefetch. Bit 3 returns 0 when read, indicating that the CIS is nonprefetchable. Furthermore, the
CIS is a byte-accessible address space, and either a doubleword or 16-bit word access yields
indeterminate results.
21
CIS_MEMTYPE
R
CIS memory type. This field returns 0s when read, indicating that the CardBus CIS base address
register is 32 bits wide and mapping can be done anywhere in the 32-bit memory space.
0
CIS_MEM
R
CIS memory indicator. This bit returns 0 when read, indicating that the CIS is mapped into system
memory space.
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