pef20550 Infineon Technologies Corporation, pef20550 Datasheet - Page 88

• Manufacturer Part Number: pef20550
• Description: Extended Line Card Interface Controller Elic
• Manufacturer: Infineon Technologies Corporation

In order to avoid such a locking situation the time
has to be greater then the maximum delay
plus the delay
For the QUAT-S a value of 0 is recommended for the suspend counter (register SCV).
For the OCTAT-P it is recommended to program
See the following diagram:
Figure 45
2.2.8.4 D-Channel Arbiter Co-operating with QUAT-S Circuits
When D-channel multiplexing is used on a S
selector of the arbiter is used.
The arbiter state machine can be disabled because the QUAT-S offers a self arbitration
mechanism between several S
OR connection between the different E-channels. As a result, the arbitration function
does not add additional delays. This means that the priority management on the S
(two classes) still may be used, allowing the mixture of signaling and packet data.
Nevertheless, it still can make sense to use the ELIC arbiter in this configuration. The
advantage of using the arbiter is, that if one terminal fails the others will not be blocked.
Semiconductor Group
HDLC Frame
From Terminal
At the Arbiter
Control Channel
Passes
D-Channel Arbiter States
Note: If the full selection counter value (AMO : FCC4...0) is not changed from its reset value 00 ,
then the D-channel arbiter (ASM) skips the state "Limited Selection".
"Available"
"Blocked"
FS = Full Selection
LS = Limited Selection
RF = Receive Frame
EF = Expect Frame
t
DCDU
1. Frame
.
End
t
DCDU
RF
Start
0
-buses. This feature is implemented by building a wired
t
t
t
t
DFS
DFS min.
DCDU
CCDD
t
LS FS
DFS
2. Frame
= Delay for Switch to "Full Selection" (Value in AMO)
= Min. Delay for not Locking Condition I
= D-Channel Delay Upstream
= Control Channel Delay Downstream
t
CCDD
88
t
CCDD
t
t
DFS min.
CCDD
Abort
0
-bus line card, only the transmit channel
EF + RF
(for the case "available"
Start
t
DFS
SCV=0 if one terminal is used.
SCV=1 in the case of 2 terminals
t
DCDU
min. (value in the AMO-register)
2. Frame
t
LS
DFS
Functional Description
H
t
CCDD
FS + EF
t
CCDD
Abort Start
PEB 20550
PEF 20550
"blocked")
ITD05842
0
01.96
-bus