參數(shù)資料
型號(hào): 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(yè)數(shù): 82/104頁(yè)
文件大?。?/td> 461K
代理商: TSB82AA2I
440
4.41 Asynchronous Context Command Pointer Register
The asynchronous context command pointer register contains a pointer to the address of the first descriptor block
that the TSB82AA2 device accesses when software enables the context by setting bit 15 (run) of the asynchronous
context control register (see Section 4.40,
Asynchronous Context Control Register
) to 1. See Table 433 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
Asynchronous context command pointer
Type
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
Default
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Name
Asynchronous context command pointer
Type
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
RWU
Default
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
Register:
Type:
Offset:
Asynchronous context command pointer
Read/Write/Update
18Ch
[ATRQ]
1ACh
[ATRS]
1CCh
[ArRQ]
1ECh
[ArRS]
XXXX XXXXh
Default:
Table 433. Asynchronous Context Command Pointer Register Description
BIT
FIELD NAME
TYPE
DESCRIPTION
314
descriptorAddress
RWU
Contains the upper 28 bits of the address of a 16-byte aligned descriptor block.
30
Z
RWU
Indicates the number of contiguous descriptors at the address pointed to by the descriptor address.
If Z is 0, then it indicates that the descriptorAddress field (bits 314) is not valid.
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