RELEASED
PM7350 S/UNI-DUPLEX
DATA SHEET
PMC-1980581
ISSUE 5
DUAL SERIAL LINK PHY MULTIPLEXER
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DESCRIPTION
The PM7350 S/UNI-DUPLEX is a monolithic integrated circuit typically used with
its sister device, the S/UNI-VORTEX, to implement a point-to-point serial
backplane interconnect architecture. The primary role of the S/UNI-DUPLEX is
to interface to up to 32 devices (typically framers or PHYs) and transfer 52-56
byte data cells in serial format to/from a backplane. Devices interface to the
S/UNI-DUPLEX via an 8 or 16-bit SCI-PHY/Utopia/Any-PHY bus, or optionally
via a 16 port clock and data interface.
Each S/UNI-DUPLEX can connect to two 100 to 200 Mb/s Low Voltage
Differential Signal (LVDS) serial links. A microprocessor port provides access to
internal configuration and monitoring registers. The microprocessor port may
also be used to insert and extract cells in support of an embedded
microprocessor communication channel.
BUS INTERFACE:
One of four modes can be selected:
• 8 or 16 bit, Utopia L2 bus master operating at up to 33 MHz bus clock
frequency. Also supports PMC-Sierra’s SCI-PHY bus standard which is
compatible with Utopia L2 but allows extended length cells and supports
an additional bus address signal in order to support 32 PHY devices
rather than Utopia’s 31. See Table 1 for a comparison of these bus
standards.
• 16 port, 4 pin clocked serial data interface (Tx, TxClk, Rx, RxClk), with
integrated I.432 ATM cell delineation operating at up to 52 MHz serial
clock frequency.
• 8 or 16 bit, SCI-PHY/Utopia bus slave operating at up to 52 MHz bus
clock frequency. The slave input port presents itself as 32 addressable
logical channels. The slave output port appears as a single addressable
channel carrying the multiplexed traffic from up to 32 logical channels
where each cell’s channel number can optionally be embedded in the H5
header field (Utopia bus mode) or indicated in a cell prepend (SCI-PHY
bus mode).
• 8 or 16 bit, Any-PHY bus slave (bus protocol compatible with the PM7351
S/UNI-VORTEX) operating at up to 52 MHz bus clock frequency. The
slave input port presents itself as 32 addressable logical channels. The
slave output port appears as a single addressable channel carrying the
multiplexed traffic from up to 32 logical channels. In both directions each
cell’s logical channel number is indicated in a cell prepend.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
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PMC [ PMC-SIERRA, INC ]
