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S/UNI-QUAD
PMC-Sierra, Inc.
PM5349 S/UNI-QUAD
DATASHEET
PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
225
Layer. Selection of which PHY layer device is being read is made by the value on
RADR[4:0] the cycle before RENB is asserted and affects the RDAT[15:0],
RSOC, and RPRTY signals. The value of RADR[4:0] selects the PHY being
polled for the RCA signal, and all devices not corresponding to this address must
tri-state its RCA output. These multi-PHY operations are directly supported by
the S/UNI-QUAD.