RELEASED
PM7350 S/UNI DUPLEX
DATA SHEET
PMC-1980581
ISSUE 8
DUAL SERIAL LINK PHY MULTIPLEXER
Table 9 Sixteen Bit SCI-PHY/Utopia Bus Slave, Output Configuration
Word
Register 0x14
INADD
UDF
H5
UDF
PRE
LEN
Notes
#
bytes
54
0
1
4
Y
Y
N
N
N
Y
0
0
0
1
00
00
PHY ID in Word 0, H1-H4 only
Default, PHY ID in Word 0, H1-H4,
H5/UDF
56
56
58
Y
Y
Y
Y
N
Y
0
0
0
1
01
01
PHY ID in Word 0, 2 user bytes, H1-H4
PHY ID in Word 0, 2 user bytes, H1-H4,
H5/UDF
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
54
N
N
Y
1
X
00
56
N
Y
Y
1
X
01
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.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
54
PMC [ PMC-SIERRA, INC ]
