PM7346 S/UNI-QJET
DATASHEET
PMC-960835
ISSUE 6
SATURN QUAD USER NETWORK INTERFACE FOR J2, E3, T3
Pin Name
Type
Input
Pin No. Function
TENB
H18
Transmit Multi-Phy Write Enable (TENB).
The TENB signal is an active low input
which is used along with the TADR[4:0]
inputs to initiate writes to the transmit
FIFOs. When sampled low using the rising
edge of TFCLK, the word on the TDAT bus
is written into the transmit FIFO selected
by the TADR[4:0] address bus. When
sampled high using the rising edge of
TFCLK, no write is performed, but the
TADR[4:0] address is latched to identify
the transmit FIFO to be accessed. 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.
TADR[4]
TADR[3]
TADR[2]
TADR[1]
TADR[0]
Input
F18
F19
F20
G18
H17
Transmit Address (TADR[4:0]). The
TADR[4:0] bus is used to select the FIFO
(and hence port) that is written to using
the TENB signal and the FIFO whose cell-
available signal is visible on the TCA
output. TADR[4:0] is sampled on the rising
edge of TFCLK together with TENB.
Note that the null-PHY address 1FH is an
invalid address and will not be identified to
any port on the S/UNI-QJET.
PMC-SIERRA, INC. PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA INC., AND ITS CUSTOMERS’ INTERNAL USE 43
PMC [ PMC-SIERRA, INC ]
