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The Downstream Status Register DSS contains counter bit fields, status bits, and
indicates the number of passive time frames.
DSS
Downstream Status Register
31
30
29
28
0
r
15
14
13
12
0
r
Field
Bits
PFC
[3:0]
NPTF
[11:8]
User's Manual
MSC, V1.37 2009-05
(18
27
26
25
24
CFA DFA
rh
rh
11
10
9
8
NPTF
rw
Type Description
rh
Passive Time Frame Counter
In Data Repetition Mode, this bit field indicates the count
of passive time frames that are currently transmitted. In
Triggered Mode PFC remains at 0000
0000
Data frame is transmitted.
B
0001
First passive time frame is transmitted.
B
0010
Second passive time frame is transmitted.
B
...
...
B
1111
Fifteenth passive time frame is transmitted.
B
rw
Number Of Passive Time Frames
This bit field indicates the number of passive time
frames that are inserted in Data Repetition Mode
between two data frames.
0000
No passive time frame inserted.
B
0001
One passive time frame inserted.
B
0010
Two passive time frames inserted.
B
...
...
B
1111
Fifteen passive time frames inserted.
B
Note: NPTF is buffered in a shadow buffer at the start of
each data frame.
19-44
Micro Second Channel (MSC)
)
Reset Value: 0000 0000
H
23
22
21
20
0
r
7
6
5
4
0
r
TC1728
19
18
17
16
DC
rh
3
2
1
0
PFC
rh
.
B
V1.0, 2011-12
H
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