參數(shù)資料
型號(hào)： IDT82V2608
廠商： Integrated Device Technology, Inc.
英文描述： INVERSE MULTIPLEXING FOR ATM
中文描述： 反向復(fù)用的ATM
文件頁(yè)數(shù)： 37/98頁(yè)
文件大?。?/td> 398K
代理商： IDT82V2608
PROGRAMMING INFORMATION for IMAOS08
37
December 4, 2006
IDT82V2608
Inverse Multiplexing for ATM
Table-20 ConfigGroupPara Command (Encoding: 05H)
This is the first command to configure a physical group. Other configuration commands prior to this command would make the group work improperly.
Command Parameters
Byte Sequence
Parameter Name
Default
Description
1
Group ID
NA
(Not Avail-
able)
The physical group ID (0~3)
This is the physical identification of an IMA group. Each Group ID is unique in the IDT82V2608 and
should not be equal to any Channel ID that has been assigned to a UNI link. There are altogether 4 phys-
ical groups. This group ID can be any value from0~3. Note that this Group ID is not the same as IMA ID
which is used to identify a logical IMA group and can be any value from0~255.
2
NE IMA ID
0H
0~255
This is the logical ID of a physical IMA group, which is packaged in ICP cells and is sent to the FE to indi-
cate which group a link belongs to.
3
Mfor Tx (M
tx
)
0H
0: 32 (default);
1: 64;
2: 128;
3: 256
This is the IMA frame length that this group will use at the transmt end. There are altogether 4 frame
lengths that can be selected: 32, 64, 128 and 256.
Note:
M
tx
must be right, otherwise IMAOS will work improperly.
4
Acceptable Mfor
Rx (M
rx
)
NA
This is the acceptable IMA frame length of the receive end.
Note:
M
rx
must be right, otherwise IMAOS will work improperly.
5-6
Max delay compen-
sation value
NA
0~1024 cells
This is the maximumcells delay that can be tolerated.
This value is constrained by the size of the external SRAMand it shall be no more than 1024 cells. Refer
to
3.4 SRAMInterface
.
Note:
If the value exceeds 1024, IMAOS will work improperly.
7
Version Backward
Compatibility
NA
0: No;
1: Yes
Version backward compatibility indicates whether version 1.0 is supported when the FE’s group is using
IMA 1.0. By default, the chip works in version 1.1 and does not support backward compatibility.
1
2
3
4
5-6
7
8
9
Group ID
NE IMA ID
Mfor Tx (M
tx
)
Acceptable Mfor
Rx (M
rx
)
Max delay com-
pensation value
Version Backward
Compatibility
P
tx
P
rx
Bit
Meaning
3
1: Accept M=256
0: Do not accept M=256
1: Accept M=128
0: Do not accept M=128
1: Accept M=64
0: Do not accept M=64
1: Accept M=32
0: Do not accept M=32
2
1
0
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