W66910CD Winbond Electronics, W66910CD Datasheet - Page 26

• Manufacturer Part Number: W66910CD
• Manufacturer: Winbond Electronics

Specifications of W66910CD

• Lead Free Status / Rohs Status: Not Compliant

7.2.4 D Channel Access Control
The D channel access control includes collision detection and priority management. The collision detection is always enabled.
The priority management procedure as specified in ITU-T I.430 is fully implemented in W66910.
A collision is detected if the transmitted D bit and the received E echo bit do not match. When this occurs, D channel
transmission is immediately stopped, and the echo channel is monitored to attempt the next D channel access.
There are two priority classes: class 1 and class 2. Within each class, there are normal and lower priority levels.
TABLE 7.4 D PRIORITY CLASSES
The selection of priority class is via the AR8/AR10 command. The following table summarizes the commands/indications used
for setting the priority classes:
TABLE 7.5 D PRIORITY COMMANDS/INDICATIONS
Command
Activate request, set priority 8
Activate request, set priority 10
Indication
Activate indication with priority 8
Activate indication with priority 10 AI10
7.2.5 Frame Alignment
The following sections describe the behavior of W66910 in respect to the CTS-2 conformance test procedures for frame
alignment. Please refer to ETSI-TM3 Appendix B1 for detailed descriptions.
Priority class
1
Priority class
2
Normal level
10
8
Symbol Code
AR8
AR10
Abbr.
AI8
Lower level
11
9
1000
1001
1100
1101
Remarks
Activation command, set D channel priority to 8
Activation command, set D channel priority to 10
Remarks
Info 4 received, D channel priority is 8 or 9
Info 4 received, D channel priority is 10 or 11
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W66910 PCI ISDN S/T-Controller
Publication Release Date:
Data Sheet
Revision 1.0
Feb,2001