PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 63

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
Pin Name
TPRTY
TSOC
TSOP
TENB
Type
Input
Input
Input
Pin
No.
B15
B15
D16
A19
Function
The UTOPIA 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. Cells with parity
errors are still inserted in the transmit stream, so the TPRTY
input may be unused. Odd or even parity may be selected.
TPRTY is considered valid only when TENB is simultaneously
asserted.
TPRTY is sampled on the rising edge of TFCLK.
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.
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
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.
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 is valid and is written
into the transmit FIFO.
TENB is sampled on the rising edge of TFCLK.
S/UNI-2488 Telecom Standard Product Datasheet
Released
63