參數(shù)資料
型號(hào)： PM5352-B1
英文描述： Interface IC
中文描述： 接口IC
文件頁(yè)數(shù)： 21/77頁(yè)
文件大?。?/td> 901K
代理商： PM5352-B1
PM5352 S/UNI STAR
DATA SHEET
PMC-1990421
ISSUE 2
SATURN USER NETWORK INTERFACE 155 (STAR)
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
17
Pin Name
Type
Pin
No.
Function
TSOP
Input
(POS)
J21
POS-PHY Transmit Start of Packet (TSOP) signals.
TSOP indicates the first word of a packet. TSOP is
required to be present at the beginning of every
packet for proper operation.
TSOP is considered valid only when TENB is
simultaneously asserted and the S/UNI-STAR is
selected via TADR[2:0].
TSOP is sampled on the rising edge of TFCLK.
TENB
Input
(ATM)
J22
UTOPIA Transmit Multi-PHY Write Enable (TENB)
signal.
The TENB signal is an active low input which is
used along with the TADR[2:0] inputs to initiate
writes to the transmit FIFO’s.
TENB works as follows. When sampled high, no
write is performed, but the TADR[2:0] address is
latched to identify the transmit FIFO to be
accessed. When TENB is sampled low, the word on
the TDAT bus is written into the transmit FIFO that
is selected by the TADR[2:0} address bus. A
complete 53 octet cell must be written to the
transmit FIFO before it is inserted into the transmit
stream. Idle cells are inserted when a complete cell
is not available. While TENB is deasserted,
TADR[2:0] can be used for polling TCA.
TENB is sampled on the rising edge of TFCLK.
This Material Copyrighted by Its Respective Manufacturer
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