TC1796
Peripheral Units (Vol. 2 of 2)
Micro Second Channel (MSC)
User’s Manual 21-18 V2.0, 2007-07
MSC, V2.0
Passive Frame Counter in Data Repetition Mode
In Data Repetition Mode, a passive time frame counter DSS.DC indicates how many
time frames have been already transmitted after the last regular data frame occurrence.
The passive time frame counter counts up from 0000
B
to the value which has been
written into bit field DSS.NPTF (number of passive time frames). DSS.PFC = 0000
B
indicates that a data frame is requested for transmission.
Figure 21-11 Passive Frame Counter Operation (with DSS.NPTF = 0101
B
)
MCT05805
DFPTF PTF PTF PTF DF
PTF = Passive Time Frame
DF = Data Frame
TRP = Time Reference Point
PTF PTF
TRP TRP TRP TRP TRP TRP TRP TRP TRP
PTF
TRP
0000
B
0001
B
0010
B
0011
B
0100
B
0101
B
Transmitted
Frames
Passive Frame
Counter
DSS.PFC
0000
B
0101
B
0001
B
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