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參數(shù)資料
| 型號： | TSB42AB4PGE |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | IEEE 1394 A CONSUMER ELECTRONICS LINK LAYER CONTROLLER |
| 中文描述： | 1394消費電子產(chǎn)品鏈路層控制器 |
| 文件頁數(shù)： | 137/183頁 |
| 文件大?。?/td> | 798K |
| 代理商： | TSB42AB4PGE |
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640
0x144 DBSTAT0 – Data Buffer Status 0
BIT
NAME
31:29
RSVD
28
BUF3WM1
TYPE
R0
RU
RESET
0
0
FUNCTION
Reserved – A write to this location has no effect. A read returns 0s.
Buffer 3 watermark 1 This bit is set by hardware to indicate that the
number of quadlets in the associated buffer has risen above or fallen
below the value in DB3CFG3.WATERMARK1, depending on the
setting of DB3CFG0.WM1CTL.
Buffer 3 watermark 0 This bit is set by hardware to indicate that the
number of quadlets in the associated buffer has risen above or fallen
below the value in DB3CFG3.WATERMARK0, depending on the
setting of DB3CFG0.WM0CTL.
Buffer 3 logical cell available – When set to 1, a complete logical cell
has been confirmed into a transmit or receive buffer.
Buffer 3 full – When set to 1, indicates that there is no space available
in the current buffer. Software cannot write to this buffer when this bit is
set.
27
BUF3WM0
RU
1
26
BUF3LCELLAV
RU
0
25
BUF3FULL
RU
0
24
BUF3EMPTY
RU
1
Buffer 3 empty – When set to 1, indicates that there is no data in the
current buffer. Software cannot read from this buffer when this bit is
set.
23:21
20
RSVD
BUF2WM1
R0
RU
0
0
Reserved – A write to this location has no effect. A read returns 0s.
Buffer 2 watermark 1 This bit is set by hardware to indicate that the
number of quadlets in the associated buffer has risen above or fallen
below the value in DB2CFG3.WATERMARK1, depending on the
setting of DB2CFG0.WM1CTL.
Buffer 2 watermark 0 This bit is set by hardware to indicate that the
number of quadlets in the associated buffer has risen above or fallen
below the value in DB2CFG3.WATERMARK0, depending on the
setting of DB2CFG0.WM0CTL.
Buffer 2 logical cell available – When set to 1, a logical cell has been
received and confirmed into a receive buffer.
Buffer 2 full – When set to 1, indicates that there is no space available
in the current buffer. Software cannot write to this buffer when this bit is
set.
19
BUF2WM0
RU
1
18
BUF2LCELLAV
RU
0
17
BUF2FULL
RU
0
16
BUF2EMPTY
RU
1
Buffer 2 empty – When set to 1, indicates that there is no data in the
current buffer. Software cannot read from this buffer when this bit is
set.
15:13
12
RSVD
BUF1WM1
R0
RU
0
0
Reserved – A write to this location has no effect. A read returns 0s.
Buffer 1 watermark 1 This bit is set by hardware to indicate that the
number of quadlets in the associated buffer has risen above or fallen
below the value in DB1CFG3.WATERMARK1, depending on the
setting of DB1CFG0.WM1CTL.
Buffer 1 watermark 0 This bit is set by hardware to indicate that the
number of quadlets in the associated buffer has risen above or fallen
below the value in DB1CFG3.WATERMARK0, depending on the
setting of DB1CFG0.WM0CTL.
Buffer 1 logical cell available – When set to 1, a logical cell has been
received and confirmed into a receive buffer.
Buffer 1 full – When set to 1, indicates that there is no space available
in the current buffer. Software cannot write to this buffer when this bit is
set.
11
BUF1WM0
RU
1
10
BUF1LCELLAV
RU
0
9
BUF1FULL
RU
0
8
BUF1EMPTY
RU
1
Buffer 1 empty – When set to 1, indicates that there is no data in the
current buffer. Software cannot read from this buffer when this bit is
set.
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