参数资料
型号: TSS463C
厂商: Atmel Corp.
英文描述: VAN Data Link Controller with Serial Interface
中文描述: 凡数据与串行接口链路控制器
文件页数: 43/59页
文件大小: 492K
代理商: TSS463C
43
TSS463C
7601B–AUTO–02/06
Figure 29.
Message Status Updating
Note:
1.
After IT ROK or RNOK. In case of IT RE, the values can be erroneous.
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 TSS463C will write the 2 bytes of the CRC field
in the message string just after DATAn. Because the VAN frame does not contain a
message length, the only way for the component to know the length of the DATA field
is either the message length register value, or the EOD field detection. When the
reserved length is too large, at the moment when it detects the EOD, the TSS463C
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
I: Initiator
C: Consumer
7
6
5
4
3
2
1
0
DATAn
- - -
- - -
- - -
- - -
- - -
- - -
-- - -
- - -
DATA0
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