PM5342 Datasheet, PDF (174/558 Pages) PMC-Sierra, Inc – SONET/SDH Payload Extractor/Aligner

DATA SHEET
PMC-970133
ISSUE 4
PM5342 SPECTRA-155
SONET/SDH PAYLOAD EXTRACTOR/ALIGNER
Address A[9:0]
1C4H-1C7H
1C8H-1CFH
1D0H-1FFH
200H
201H-3FFH
Register
Reserved
SPTB #3 Registers
Reserved
Master Test
Reserved for Test
Notes on Register Bits:
1. Writing values into unused register bits has no effect. However, to ensure
software compatibility with future, feature-enhanced versions of the product,
unused register bits must be written with logic zero. Reading back unused
bits can produce either a logic one or a logic zero; hence unused register bits
should be masked off by software when read.
2. All configuration bits that can be written into can also be read back. This
allows the processor controlling the SPECTRA-155 to determine the
programming state of the device.
3. Writeable normal mode register bits are cleared to logic zero upon reset
unless otherwise noted.
4. Writing into read-only normal mode register bit locations does not affect
SPECTRA-155 operation unless otherwise noted.
5. Certain register bits are reserved. These bits are associated with megacell
functions that are unused in this application. To ensure that the
SPECTRA-155 operates as intended, reserved register bits must only be
written with the logic level as specified. Writing to reserved registers should
be avoided.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE 152