PMC-Sierra PM5349 manual Tenb, TADR4, TADR3, TADR2, TADR1, TADR0

		PMC-Sierra, Inc.	PM5349 S/UNI-QUAD
S/UNI-QUAD
DATASHEET
PMC-971239	ISSUE 6		SATURN USER NETWORK INTERFACE (155-QUAD)

Pin Name	Type	Pin	Function
		No.
TENB	Input	J22	UTOPIA Transmit Multi-PHY Write Enable (TENB)
			signal.
			The TENB signal is an active low input which is
			used along with the TADR[4:0] inputs to initiate
			writes to the transmit FIFO’s.
			TENB works as follows. When sampled high, no
			write is performed, but the TADR[4:0] 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[4:0] 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[4:0] can
			be used for polling TCA.
			TENB is sampled on the rising edge of TFCLK.
TADR[4]	Input	G21	UTOPIA Transmit Write Address (TADR[4:0])
TADR[3]		H20	signals.
TADR[2]		G22	The TADR[4:0] bus is used to select the FIFO (and
TADR[1]		H21
			hence port) that is written to using the TENB signal
TADR[0]		G23
			and the FIFO's whose cell available signal is visible
			on the TCA polling output.
			Note that address 0x1F is the null-PHY address and
			cannot be assigned to any port on the S/UNI-QUAD.
			TADR[4:0] is sampled on the rising edge of TFCLK.

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