PM7340 S/UNI-IMA-8
PRELIMINARY
INVERSE MULTIPLEXING OVER ATM
DATA SHEET
PMC-2001723
ISSUE 3
INVERSE MULTIPLEXING OVER ATM
Figure 33
- UTOPIA L2 Transmit Slave
TCLK
TADR[4:0]
DEV 1
IMA-PHY-X
DEV 3
IMA-PHY-X
DEV 2
1 TCLK
TCA
TDAT[m:0], TPRTY
TENB
Data K-3
Data K-2
Data K-1
Data K
Data 0
Data 1
TSOP
13.3.2 Any-PHY Transmit Slave Interface
Figure 34 gives an example of the functional timing of the transmit interface when
configured as an 8-port Any-PHY compliant transmit slave. The Any-PHY master
polls the ports in the S/UNI-IMA-8 and the S/UNI-IMA-8 device responds by
driving TPA. If the S/UNI-IMA’s polled port is capable of accepting a complete
cell, TPA is driven active otherwise the TPA is driven inactive. Positive responses
are recorded by the master and will eventually result in a data transfer. Ports are
selected for data transfers via an in-band address prepend in first word of the
data transfer. Polling continues independent of the data transfer state.
Data transfers are initiated with the assertion of TENB and TSX; they complete
without pausing.
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
291
PMC [ PMC-SIERRA, INC ]
