参数资料
型号: TSS461CD
英文描述: LAN Node Controller
中文描述: 网络节点控制器
文件页数: 47/52页
文件大小: 268K
代理商: TSS461CD
TSS461C
47
Rev. D (22 Feb 01)
15. Linked channels
The linkage feature allows to channels to share the same Message area, the message pointer and the message length
assumes this 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. This means, (see Figure 31. ) 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.
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
CHER CHTx CHRx
ID_Mask i (lsb)
-
DATA n
The Channel j linked
to the Channel i
. . . .
L
--- Message for Channels i & j ---
Channel i and j
share the same
Message area
ID_Mask i (msb)
RTR
CHER CHTx
ID_Mask j (msb)
ID_Mask j (lsb)
Figure 31. Linkage mechanism
This Message area sharing permits either to optimize the allocation of the 128 bytes of DATA, either to perform some
special communications between the different nodes of the network.
相关PDF资料
PDF描述
TSS461CR LAN Node Controller
TSS463-AA TSS463-AA [Updated 3/03. 60 Pages]
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