PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Function
Pin Name
Type
Input
Pin
No.
TPRTY
B15
The POS-PHY transmit bus parity (TPRTY) signal indicates
the parity on the TDAT[31:0] bus. A parity error is indicated by a
status bit and a maskable interrupt. Packets with parity errors
are still inserted in the transmit stream, so the TPRTY input may
be unused. Odd or even parity may be selected.
(continued)
TPRTY is considered valid only when TENB is simultaneously
asserted.
TPRTY is sampled on the rising edge of TFCLK.
The UTOPIA transmit start of cell (TSOC) signal marks the
start of a cell structure on the TDAT[31:0] bus. The first word of
the cell structure is present on the TDAT[31:0] bus when TSOC
is high. TSOC must be present for each cell. TSOC is
D16
TSOC
TSOP
Input
considered valid only when TENB is simultaneously asserted.
TSOC is sampled on the rising edge of TFCLK.
The POS-PHY transmit start of packet (TSOP) signal indicates
the start of a packet on the TDAT[31:0] bus. TSOP is required to
be present at all instances for proper operation.
TSOP must be set high for the first word of a packet on
TDAT[31:0]. TSOP is considered valid only when TENB is
simultaneously asserted.
TSOP is sampled on the rising edge of TFCLK.
A19
The UTOPIA transmit write enable (TENB) signal is an active
low input which is used to initiate writes to the transmit FIFO.
When TENB is sampled high, the information sampled on the
TDAT[31:0], TPRTY and TSOC signals are invalid. When TENB
is sampled low, the information sampled on the TDAT[31:0],
TPRTY and TSOC signals are valid and are written into the
transmit FIFO.
TENB
Input
TENB is sampled on the rising edge of TFCLK.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
34
PMC [ PMC-SIERRA, INC ]
