PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
Register 0x326: TIMA Indirect Memory Data MSB
Bit
Type
Function
Default
15:0
R/W
MEM_DATA_MSB
0
This register should not be written while the MEM_BUSY bit is set.
MEM_DATA_MSB:
The MEM_DATA_MSB represents either: (1) the most significant 16 bits
(31:16) of the data to be written to internal memory or (2) the most significant
bits of the data resulting from the previous read operation. The read data is
not valid until after the MEM_BUSY bit has been cleared by the TIMA. If a
memory location is read which does not support bits 31:16, then
corresponding register bits are loaded with 0. If a memory location is written
which does not support bits 31:16, then data in the corresponding register bits
is ignored. The actual definition of each memory table is described below:
Transmit IMA Group Context Table Memory
The Transmit IMA Group Context Table Memory contains state information and
statistics for each group maintained by the transmit engine. Additionally, ICP cell
information delivered by the RIPP is stored for each group. Data is organized into
4 records one for each of the maximum 4 IMA groups. Each record is 32 bits
wide per word and 16 words deep. Each record is addressed by the group tag.
MEM_ADDR = (Group Tag X 16) + Word Offset
Table 31
Word
Transmit IMA Group Context Record
Bits
Parameter
Description
0
1
31: 0
31:16
Reserved.
Discarded Cells Number of cells discarded from ATM layer
when the IMA group was in an non-
operational state.
15:0
Reserved
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
244
PMC [ PMC-SIERRA, INC ]
