
STANDARD PRODUCT
PM7323 RCMP-200
DATASHEET
PMC-960543
ISSUE 2
ROUTING CONTROL, MONITORING, & POLICING
200 MBPS
Proprietary and Confidential to PMC-Sierra, Inc.
and for its Customer’s Internal Use.
64
Word #
Contents
N
Last post-pended word, N < 6 (optional)
N+1
ATM header: GFC, VPI and VCI
N+2
ATM header: VCI, PTI and CLP
N+3
HEC and User Defined Field
N+4
1st ATM payload word
N+5
2nd ATM payload word
...
...
N+27
24th ATM payload word
If the cell's header is to be translated (UPHDRX logic 1), the number appended
words shall match that programmed in the Input Cell FIFO Configuration register.
If the cell's header is not be to translated (UPHDRX logic 0), the number
appended words shall match that programmed in the Output Cell FIFO
Configuration register. The RCMP-200 automatically handles cell length
mismatches. Extra words shall be stripped with no consequences, but words
that must be added to the end of the appended bytes will have arbitrary contents;
therefore, the resulting cell processing may be unpredictable. Note that if extra
words are to be stripped off, the first words of the cell are discarded until the
lengths are equal.
If the UPHDRX register bit is a logic 0, the written cell is presented verbatim on
the Output Cell Interface.
Upon completion of a cell write, the cell will be transferred in the next available
time slot.
The above sequence may be repeated to insert further cells. The assertion of
the INSRDY bit indicates the transfer has been completed.
9.8.3 Reading Cells
Cells received on the Input Cell Interface can be routed to the Microprocessor
Cell Buffer based on the contents of the cell.
The buffer has a capacity of fifteen to eighteen cells depending on the length of
the extracted cells: