Close_Channel Command - NEC uPD98502 User Manual

4.7.3 Close_Channel command

The Close_Channel command is used to close a send or receive channel. Upon accepting this command, ATM
Cell Processor returns the VC table to VC Table pool.
The indication that ATM Cell Processor returns for this command has the following format:
[Close_Channel command]
CMR
0 1 0 0 1 R/T
31 30 29 28 27 26 25 24
[Close_Channel command indication]
CMR
Undefined
31 25 24 23
Close_Channel command
R/T Indicates whether the channel to be closed is a send or a receive channel.
1: Receive channel
0: Transmit channel
VC Number VC Number of the channel that V
Close_Channel command indication
E Error bit. If detects an error (ex. Invalid VC number), sets this bit to a '1'. When V
this command, this bit has to be set to a '0'.
VC Number Closed VC Number of the channel. If the channel cannot be closed, 0 is set in this area.
CHAPTER 4 ATM CELL PROCESSOR
Figure 4-20. Close_Channel Command and Indication
0
18 17
E Undefined
18 17
R
Preliminary User's Manual S15543EJ1V0UM
VC Number
VC Number
4120A intends to close.
0
6 5 0
0
6 5 0
4120A issues
R
259