PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
9.5
System Side Utopia and POS Signals (84)
Function
Pin Name
Type
Pin
No.
The Utopia/POS interface select (POSL3/UL3B) selects
between Utopia Level 3 and POS-PHY Level 3 mode for the
system side interface. When POSL3/UL3B is low, the Utopia
Level 3 interface is selected. When high, the POS-PHY Level 3
interface is selected.
POSL3_
UL3B
Input
B19
E28
The UTOPIA receive FIFO read clock (RFCLK) signal is used
RFCLK
Input
to read ATM cells from the receive cell FIFO.
RFCLK is expected to cycle at 104 MHz.
The POS-PHY receive FIFO read clock (RFCLK) signal is
used to read packet data from the 256 byte packet FIFO.
RFCLK is expected to cycle at 104 MHz.
P29
The UTOPIA receive parity (RPRTY) RPRTY signal indicates
the parity of the RDAT bus. The RPRTY signal indicates the
parity on the RDAT[31:0] bus. Either odd or even parity
selection can be selected.
RPRTY
Output
RPRTY is updated on the rising edge of RFCLK.
The POS-PHY receive parity (RPRTY) signal indicates the
parity of the RDAT bus. Either odd or even parity can be
selected.
RPRTY is updated on the rising edge of RFCLK.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
28
PMC [ PMC-SIERRA, INC ]
