PM7350-PI datasheet(64/241 Pages) PMC

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RELEASED

PM7350 S/UNI-DUPLEX

DATA SHEET

PMC-1980581

ISSUE 5

DUAL SERIAL LINK PHY MULTIPLEXER

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

Table 9 Sixteen Bit SCI-PHY/Utopia Bus Slave, Output Configuration

Word

bytes

INADD

UDF

PRE

LEN

Notes

H1-H4 only, no PHY ID

Default, Utopia compatible, no PHY ID

2 user bytes, H1-H4, no PHY ID

2 user bytes, H1-H4, H5/UDF, no PHY ID

Most common setting when Utopia

compatibility is desired. Standard 54

byte cell, PHY ID embedded in H5/UDF.

2 user bytes, H1-H4, PHY ID in H5/UDF

9.1.3 Any-PHY Slave

The Any-PHY bus slave format is enabled when the IANYPHY and OANYPHY

inputs are high, and IMASTER, and OMASTER inputs are all tied low.

In the ingress direction (cells are transferred from the parallel bus input port to

the LVDS links), the port presents itself as 32 PHY entities. Cells read from the

bus are queued in a dedicated FIFO for each logical channel. As in the SCI-PHY

bus mode, the ability of the FIFOs to accept additional cells is discovered

through polling using the IADDR[4:0] and IAVALID inputs. Upon IAVALID being

sampled low (note this is opposite to SCI-PHY mode) the ICA output is asserted

if the cell FIFO for the logical channel addressed by IADDR[4:0] has at least one

empty cell buffer. If the FIFO is full, ICA is deasserted. If a cell transfer is in

progress that will fill a logical channel FIFO, ICA will also be deasserted. If

IAVALID is sampled high ICA becomes high impedance. ICA is delayed by one

bus cycle (i.e. one IFCLK cycle) in the Any-PHY bus configuration.

In Any-PHY mode cell transfer is initiated using inband selection. The first word

of the cell, coincident with the assertion of the ISX signal, is used for logical

channel selection. Cells are accepted by the S/UNI-DUPLEX if the value in the

Extended Address field of Word 0 agrees with the Extended Address Match

registers over the range of bits specified by the Extended Address Mask

registers.

Table 10 summarizes the distinctions between the SCI-PHY/Utopia and Any-PHY

protocols in the ingress direction.

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