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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.
63
9.8.2 Writing Cells
The RCMP-200 contains a one cell buffer for the assembly of a cell by the
microprocessor for presentation on the Output Cell Interface. Optional header
translation and CRC-10 protection provides full support of diagnostic and OAM
requirements.
Writes are performed by manipulating the Microprocessor Buffer Control and
Status (0x11) and Microprocessor Buffer Data (0x12) registers. Follow the steps
below to write a cell:
1. Poll the INSRDY bit in the Microprocessor Insert Buffer Control and Status
register until it is a logic 1. Alternately, service the interrupts that result from
setting the INSRDYE bit in the Master Interrupt Enable #1 (0x04) register.
The INSRDYI bit in the Master Interrupt Status #1 (0x02) register is set
whenever the INSRDY bit is asserted.
2. Write the WRSOC bit in the Microprocessor Insert Buffer Control and Status
register. At the same time, ensure that the OLEN[2:0], CRC10, UPHDRX and
PHY[4:0] register bits are set to their correct values, depending on what
operation is required.
If UPHDRX is a logic 1, PHY[4:0] represents the input PHY address that the
cell is associated with and will be included in the search key used for VC
identification.
3. Write the cell contents to the Microprocessor Buffer Data register. Each
subsequent write enters the next word in the cell. The words shall be written
in the following order:
Table 14
-
Word #
Contents
1
1st pre-pended word (optional)
...
...
M
Last pre-pended word, M N (optional)
M+1
1st post-pended word (optional)
...
...