參數(shù)資料
型號(hào)： 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(yè)數(shù)： 50/57頁(yè)
文件大?。?/td> 423K
代理商： TSS461C-TDRZ
50
TSS461C
4193G–AUTO–12/04
Linked Channels
The linkage feature allows two channels to share the same Message area, the message
pointer and the message length assumes the following property:
Zero value as message length (M_L [4:0] - base_address + 0x03) declares the
channel linked to another channel.
The number of this other channel is defined in the message pointer field (M_P [6:0]
- base_address + 0x02).
The pointer and the length values for the Message area are defined only once time,
in the register set of this other Channel.
Only one level of linkage can be created. For example, (see Figure 29) a Channel k can
be linked to the Channel i but not to Channel j, already defined as linked to Channel i.
All the others can be different between the two channels, for example the ID_Tag.
Figure 30.
Linkage Mechanism
This Message Area sharing permits either optimizing the allocation of the 128 bytes of
DATA, performing some special communications between the different nodes of the
network.
ID_Tag j (msb)
ID_Tag j (lsb)
EXT RAK RNW RTR
DRAK
i
0x00
CHRx
Message Status
DATA 0
-
ID_Tag i (msb)
ID_Tag i (lsb)
EXT RAK RNW
DRAK
Mess_Ptr
Mess_Len = n+2
CHERCHTx CHRx
ID_Mask i (lsb)
-
DATA n
The Channel j linked
to the Channel i
. . . .
L
--- Message forChannels i & j ---
Channel i and j
share the same
Message area
ID_Mask i (msb)
RTR
CHERCHTx
ID_Mask j (msb)
ID_Mask j (lsb)
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