參數(shù)資料
型號: TSS463C
廠商: Atmel Corp.
英文描述: VAN Data Link Controller with Serial Interface
中文描述: 凡數(shù)據(jù)與串行接口鏈路控制器
文件頁數(shù): 15/59頁
文件大小: 492K
代理商: TSS463C
15
TSS463C
7601B–AUTO–02/06
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 wave-
form showed in Figure 11 if the correct representations for pulsed coding are desired.
Figure 11.
State Encoding
VAN Frame
Figure 12.
Van Bus Frame
The VAN bus supports three different module (unit) types:
The
Autonomous
module, that is a bus master. It can transmit Start of Frame (SOF)
sequences, it can initiate data transfers and can receive messages.
The
Synchronous access
module. It cannot transmit SOF sequences, but it can
initiate data transfers and can receive messages.
The
Slave
module, that can only transmit using an in-frame mechanism and can
receive messages.
Figure 13.
Hierarchical Access Methods
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 TSS463C will synchronize its bit rate clock to the data
received.
SOF
Identifier
Field
Command
Data
Field
Frame
Check
Sum
EOD
ACK
EOF
EXT
RAK
R/W
RTR
SOF
ID
COM
DATA
ACK
EOF
EOD
Autonomous
Rank 0
ID
COM
DATA
FCS
ACK
EOF
EOD
Synchronous
Rank 1
DATA
FCS
ACK
EOF
EOD
Slave
Rank 16
R
FCS
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