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PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE
88
10
NORMAL MODE REGISTER DESCRIPTION
Normal mode registers are used to configure and monitor the operation of the
S/UNI-QJET. Normal mode registers (as opposed to test mode registers) are
selected when A[10] 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 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 S/UNI-QJET to determine the
programming state of the block.
3. Writable 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
S/UNI-QJET 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 S/UNI-QJET
operates as intended, reserved register bits must only be written with the
suggested logic levels. Similarly, writing to reserved registers should be
avoided.
guarantee proper device operation and long term reliability. Please refer to
Section 12.1 of this document for the details on how to program this
sequence.