PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
9.2 Transmit Slave Interface (ANY-PHY mode) (30 Signals)
Pin Name
Type
Pin Function
No.
TCLK
Input
E19 The Transmit Clock (TCLK) signal is used to
transfer cells across the ANY-PHY interface to the
internal downstream cell buffers.
The TPA output is updated on the rising edge of
TCLK.
The TENB. TSX, TSOP, TDAT[15:0], TPRTY,
TADR[6:0], and TCSB inputs are sampled on the
rising edge of TCLK.
The TCLK input must cycle at a 52 MHz or lower
instantaneous rate.
TPA
Tristate L22 The Transmit Packet Available (TPA) is an active
Output
high signal that indicates the availability of space in
the selected logical channel FIFO when polled using
the TADR[6:0] signals.
The S/UNI-IMA-8 device drives TPA with the cell
availability status of the polled port two TCLK cycles
after TADR[6:0] matches the S/UNI IMA’s device
address. The TPA output is high-impedance at all
other times.
The TPA output is updated on the rising edge of
TCLK.
TENB
Input
L20 The Transmit enable bar (TENB) is an active low
signal that is used to indicate cell transfers to the
internal cell buffers.
The TENB input is sampled on the rising edge of
TCLK.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
21
PMC [ PMC-SIERRA, INC ]
