PM5371TUDX
DATA SHEET
PMC-920525
ISSUE 6
SONET/SDH TRIBUTARY UNIT CROSS CONNECT
10
NORMAL MODE REGISTER DESCRIPTION
Normal mode registers are used to configure and monitor the operation of the
TUDX. Normal mode registers (as opposed to test mode registers) are selected
when TRS (A[4]) is low.
Notes on Normal Mode 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 0. Reading back unused bits
can produce either a logic 1 or a logic 0; 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 TUDX to determine the programming
state of the block.
3. Writeable normal mode register bits are cleared to logic 0 upon reset unless
otherwise noted.
4. Writing into read-only normal mode register bit locations does not affect
TUDX operation unless otherwise noted.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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PMC [ PMC-SIERRA, INC ]
