參數(shù)資料
型號: TSS461C-TDRZ
廠商: ATMEL CORP
元件分類: 微控制器/微處理器
英文描述: VAN Data Link Controller
中文描述: 1 CHANNEL(S), 1M bps, LOCAL AREA NETWORK CONTROLLER, PDSO24
封裝: ROHS COMPLIANT, SO-24
文件頁數(shù): 41/57頁
文件大?。?/td> 423K
代理商: TSS461C-TDRZ
41
TSS461C
4193G–AUTO–12/04
Figure 23.
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.
Notes:
1. If the length reserved (in the message length & status register) for an incoming frame
is 2 bytes greater or more, the TSS461C 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 TSS461C 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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