S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Transmit IMA Group Configuration Table (MEM_SELECT=0)
Purpose: Contains IMA configuration data programmed by PM.
Usage: IMA Groups only.
Maintained by: Microprocessor.
Record Size: One 32-bit word.
MEM_ADDR = 0x2A0 + Group Tag
Table 32 Transmit IMA Group Configuration Table Record
Bits
31:23
Parameter
Description
Unused
22:16
VPHY Address
VPHY address (group FIFO number) that is assigned to this group.
This field should be modified by PM only during group configuration.
Valid values are 0 to 7.
15:9
10
Unused
Disable Cell
Discard
Configuration bit that determines if the ATM cell-discarding feature
is enabled for this IMA Group. When set to 0, ATM cells will be read
and discarded from the group FIFO (one for each request) if there
are no active links in the group. When set to 1, cell discarding will
not occur for the group.
9
Stuff Advertise
Mode
Configuration bit that determines whether stuff cell advertising is
done either four ICP cells ahead or one ICP cell ahead of the stuff
event. This bit should be changed only on Group startup, otherwise
the number of cells between TRL stuff events will not be correct.
0 = one ICP cell ahead; 1 = four ICP cells ahead
8
Stuff Mode
OAM Label
Configuration bit that determines whether ITC or CTC stuff mode is
actually used for this group. Note it is possible to advertise ITC
Transmit Clock Mode in an ICP cell but still use a common clock
and CTC stuff mode.
0 = ITC stuff mode, 1 = CTC stuff mode
Static field to be inserted into octet 6 of ICP cells and OAM cells.
7:0
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
241
PMC [ PMC-SIERRA, INC ]
