PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
high, respectively. The RPA
is driven with the cell
following the one that
samples RENB low or high,
respectively. The RPA is
driven with the cell
availability status one CLK
cycle after the RADR[4:0]
pins match the S/UNI-IMA-
8’s address. A match is
defined as either matching
the programmed value in
single PHY mode or being
within the correct range for
multi-PHY mode.
availability status two CLK
cycles after RADR[4:0] pins
match the S/UNI-IMA-8’s
address.
RSX
Undefined. It is low when not High coincident with the first
high impedance.
word of the cell data
structure.
RSOP
High coincident with the first High coincident with the first
word of the cell data
structure.
byte of the cell header.
Paused
Permitted by deasserting
RENB high, but the S/UNI-
IMA’s address must be
Not Permitted.
transfers
presented on RADR[4:0] the
last cycle RENB is high to
reselect the same PHY.
Autonomous Not supported. A subsequent The outputs become high
deselection cell is output (provided one is impedance after the last
available) if RENB is held
word of a cell is transferred
low beyond the end of a cell. and until the S/UNI-IMA-8 is
reselected.
The cell format for the receive direction is the same as the transmit interface; see
Figure 7 and Figure 8 for the formats.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
46
PMC [ PMC-SIERRA, INC ]
