TSS461F-TDRZ-9 Atmel, TSS461F-TDRZ-9 Datasheet - Page 50
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TSS461F-TDRZ-9
Manufacturer Part Number
TSS461F-TDRZ-9
Description
Network Controller & Processor ICs Van Data Link Controller
Manufacturer
Atmel
Datasheet
1.TSS461F-TDRZ-9.pdf
(57 pages)
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Linked
Channels
Figure 31. Linkage Mechanism
50
TSS461F
DRAK
DRAK
Mess_Len = n+2
ID_Tag j (lsb)
ID_Tag i (lsb)
ID_Mask j (lsb)
ID_Mask i (lsb)
The linkage feature allows two channels to share the same Message area, the message pointer
and the message length assumes the following property:
•
•
•
Only one level of linkage can be created. For example, (see Figure 30) 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.
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.
0x00
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.
ID_Mask j (msb)
ID_Mask i (msb)
ID_Tag j (msb)
ID_Tag i (msb)
The Channel j linked
Mess_Ptr
EXT RAK RNW RTR
EXT RAK RNW
CHER CHTx
CHER CHTx CHRx
i
to the Channel i
. . . .
CHRx
RTR
--- Message for Channels i & j ---
Message Status
DATA n
DATA 0
Channel i and j
share the same
Message ar ea
7615A–AUTO–02/06
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