![](http://datasheet.mmic.net.cn/390000/TSB42AA4I_datasheet_16839080/TSB42AA4I_149.png)
652
0x15C 0x174 0x18C 0x1A4 0x1BC 0x1D4 0x1EC 0x204
DB(N)CFG0 – Data Buffer #N Configuration Register 0
BIT
NAME
TYPE
RESET
FUNCTION
31:30
RSVD
R0
0
Reserved – A write to this location has no effect. A read returns 0s.
29:28
PADSIZE
RW
0
Padding size The number of bytes in the last quadlet of a packet that
does not contain valid data. This is only used if the data does not end on a
quadlet boundary.
27:16
CELL LENGTH
RW
DEP
Cell length – The value written to this field indicates the number of
quadlets to be flushed when a packet flush command is issued to the
associated buffer. The default values for these registers are
buffer-dependent as shown in the following:
Buffer 0 – 30
Buffer 1 – 30
Buffer 2 – 00
Buffer 3 – 00
Buffer 4 – 00
Buffer 5 – 00
Buffer 6 – 00
Buffer 7 – 00 (not configured)
15
WM1CTL
RW
1
WTRMRK 1 control – The setting of this bit determines the functionality of
the DBSTAT.BUF(N)WM1 bit. When set to 1, the DBSTAT.BUF(N)WM1
bit is asserted when the number of quadlets in the associated buffer is
greater
than
or
equal
to
the
DB(N)CFG3.WATERMARK1
field.
DBSTAT.BUF(N)WM1 bit is asserted when the number of quadlets in the
associated buffer is less than or equal to the value in the associated
DB(N)CFG3.WATERMARK1 field. If configured for water mark
monitoring, the associated GPIO signal acts the same as the
DBSTAT.BUF(N)WM1 bit.
value
When
in
set
the
associated
0,
to
the
14
WM0CTL
RW
0
WTRMRK 0 control – The setting of this bit determines the functionality of
the DBSTAT.BUF(N)WM0 bit. When set to 1, the DBSTAT.BUF(N)WM0
bit is asserted when the number of quadlets in the associated buffer is
greater
than
or
equal
to
the
DB(N)CFG3.WATERMARK0
field.
DBSTAT.BUF(N)WM1 bit is asserted when the number of quadlets in the
associated buffer is less than or equal to the value in the associated
DB(N)CFG3.WATERMARK0 field. If configured for water mark
monitoring, the associated GPIO signal acts the same as the
DBSTAT.BUF(N)WM0 bit.
value
When
in
set
the
associated
0,
to
the
13:12
VIDEOSEL
RW
DEP
Video select – Routes the indicated video stream hardware to the
associated buffer according to the following settings:
00 – No video stream routed to the associated buffer
01 – Video stream A routed to the associated buffer
10 – Video stream B routed to the associated buffer
11 – No video stream routed to the associated buffer
Individual buffers default to the following selections:
Buffer 0 – 01
Buffer 1 – 01
Buffer 2 – 00
Buffer 3 – 00
Buffer 4 – 00
Buffer 5 – 00
Buffer 6 – 00
Buffer 7 – 00 (not configured)