參數(shù)資料
型號: TSS463A-TERZ
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): 44/60頁
文件大?。?/td> 816K
代理商: TSS463A-TERZ
44
TSS463-AA
4205B–AUTO–12/04
Figure 29.
Message Status Updating
Message Data (string
pointed by: Message
Pointer Register + 1)
DATA0
is the first received (or transmitted) byte,
DATAn
is the last one.
Note:
1. If the length reserved (in the message length and status register) for an incoming
frame is 2 bytes greater or more, the TSS463AA will write the 2 bytes of the CRC
field in the message string just after DATAn.
Because the VAN frame does not content a message length, the only way for the
component to know the length of the DATA field is either the message length register
value, either the EOD field detection. When the reserved length is too large, at the
moment when it detects the EOD, the TSS463AA has already written the 2 bytes of
the CRC field, considering these bytes as normal DATA.
2. The Mailbox RAM area is a circular buffer. The next location after 0xFF is 0x80.
Data Frame
Immediate
Reply
I, P
C
Frame Type
Node x
Message Status on Node A after IT(*)
Commu-
nication
Node A
RAK
RNW
RTR
length
previous
value
I, C
P
RAK
RNW
RTR
Deferred
Reply
previous
value
I, C
P
RAK
RNW
RTR
Data Frame
I, P
C
Immediate
Reply
I, C
P
RAK
RNW
RTR
length
Deferred
Reply
I, C
P
RAK
RNW
RTR
length
previous values
P: Producer
(*) After IT ROK or RNOK. In case of IT RE, the values can be erroneous.
I: Initiator
C: Consumer
7
6
5
4
3
2
1
0
DATAn
- - -
- - -
- - -
- - -
- - -
- - -
-- - -
- - -
DATA0
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