PM5356 datasheet(79/307 Pages) PMC

79 / 307 page

RELEASED

S/UNI-622-MAX

PMC-Sierra, Inc.

PM5356

S/UNI-622-MAX

DATASHEET

PMC-1980589

ISSUE 6

SATURN USER NETWORK INTERFACE (622-MAX)

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

11 NORMAL MODE REGISTER DESCRIPTION

Normal mode registers are used to configure and monitor the operation of the

S/UNI-622-MAX. Normal mode registers (as opposed to test mode registers) are

selected when TRS (A[8]) is low.

Notes on Normal Mode Register Bits:

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.

All configuration bits that can be written into can also be read back. This

allows the processor controlling the S/UNI-622-MAX to determine the

programming state of the block.

Writable normal mode register bits are cleared to logic zero upon reset

unless otherwise noted.

Writing into read-only normal mode register bit locations does not affect

S/UNI-622-MAX operation unless otherwise noted. Performance monitoring

counter registers are a common exception.

Certain register bits are reserved. These bits are associated with

megacell functions that are unused in this application. To ensure that the

S/UNI-622-MAX operates as intended, reserved register bits must be written

with their default value as indicated by the register bit description.

Writing any data to the Master Reset and Identity register (0x00)

simultaneously loads all the performance monitoring registers in RSOP,

RLOP, RPOP, SPTB, SSTB, RXCP, TXCP, RXFP and TXFP blocks in the

device.

Writing any data to the performance register in question may individually

trigger the performance registers in each block. In some cases, all

performance registers in the block are loaded. In other cases, only the

specific register being written will load. See the register descriptions for the

performance register in question for more information.

PM5356 Datasheet(PDF) 79 Page - PMC-Sierra, Inc