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PM7344 데이터시트(PDF) 49 Page - PMC-Sierra, Inc

부품명 PM7344
상세설명  SATURN QUAD T1/E1 MULTI-PHY USER NETWORK INTERFACE DEVICE
PDF  293 Pages
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제조업체  PMC [PMC-Sierra, Inc]
홈페이지  http://www.pmc-sierra.com
Logo PMC - PMC-Sierra, Inc

PM7344 데이터시트(HTML) 49 Page - PMC-Sierra, Inc

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PM7344 S/UNI-MPH
DATA SHEET
PMC-950449
ISSUE 6
MULTI-PHY USER NETWORK INTERFACE
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
33
Pin Name
Type
Pin
No.
Function
TWA[1]
Input
63
Transmit Write Address MSB (TWA[1]). The
TWA[1] signal is available on this pin when input
MPHEN is high. TWA[1] is used (along with
TWA[0]) to select the FIFO (and hence port) that
is written to using the TWRMPHB signal.
TWA[1] is sampled on the rising edge of TFCLK
together with TWRMPHB.
TWRENB[3
]
Transmit Write Enable PHY #3 (TWRENB[3]).
The TWRENB[3] signal is available on this pin
when input MPHEN is low. TWRENB[3] is used
to initiate writes to the transmit FIFO of PHY #3.
When sampled low using the rising edge of
TFCLK (and the remaining three TWRENBs
remain high), a byte is written to PHY #3's
synchronous FIFO. When sampled high using
the rising edge of TFCLK, no write is performed.
TWRENB[3] must operate in conjunction with
TFCLK to access the FIFOs at a high enough
instantaneous rate as to avoid FIFO overflows.
The ATM layer device may deassert
TWRENB[3] at anytime it is unable to provide
another byte.



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