TSS463-AA ATMEL Corporation, TSS463-AA Datasheet - Page 15
TSS463-AA
Manufacturer Part Number
TSS463-AA
Description
Van (ISO Standard 11519-3) Datalink Controller With Serial Interface.
Manufacturer
ATMEL Corporation
Datasheet
1.TSS463-AA.pdf
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VAN Frame
Figure 13. Hierarchical Access Methods
4205A–AUTO–03/03
Rank 0
Rank 1
Rank 16
Autonomous
SOF
In Figure 11 the pulsed waveforms are shown. In Figure 14 through Figure 20 the low
"timeslots" (i.e. blocks of 16 prescaled clocks) should be replaced by the dominant
waveform showed in Figure 11 if the correct representations for pulsed coding are to be
seen.
Figure 11. State Encoding
Figure 12. VAN Bus Frame
The VAN bus supports three different module (unit) types:
1. The Autonomous module, which is a bus master. It can transmit Start Of Frame
2. The Synchronous access module. It cannot transmit SOF sequences, but it can
3. The Slave module, which can only transmit using an in-frame mechanism and
Figure 12 shows a normal VAN bus frame. It is initiated with a Start of Frame (SOF)
sequence shown in Figure 14. The SOF can only be transmitted by an autonomous
module. During the preamble, the TSS463AA will synchronize its bit rate clock to the
data received.
SOF
Synchronous
(SOF) sequences, it can initiate data transfers and can receive messages.
initiate data transfers and can receive messages.
can receive messages.
ID
ID
Identifier
Field
COM
COM
EXT
Slave
RAK
Command
DATA
DATA
DATA
R/W
RTR
FCS
FCS
FCS
Field
Data
EOD
EOD
EOD
ACK
ACK
ACK
Frame
Check
Sum
TSS463-AA
EOF
EOF
EOF
EOD
ACK
EOF
15
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