S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Figure 42 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
14.3.2 Any-PHY Transmit Slave Interface
Figure 43 gives an example of the functional timing of the transmit interface when configured
as a 4-port Any-PHY compliant transmit slave. The Any-PHY master polls the ports in the
S/UNI-IMA-4 and the S/UNI-IMA-4 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.
Figure 43 Any-PHY Transmit Slave
TCLK
TADR
TCSB
IMA-ADR
PHY 7
PHY 1
PHY 0
PHY 1
2 TCLK
TPA
IMA-ADR
AT[m:0], TPRTY
PHY 5 ADR Data 1
Data 2
Data 3
Data K-1 Data K IMA-ADR Data 1
TENB
TSX
TSOP
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
298
PMC [ PMC-SIERRA, INC ]
