S/UNI-IMA-4 Telecom Standard Product Data Sheet
Released
Figure 9 8-bit Receive Cell Transfer Format
Bits 7-0
Address Prepend
Byte 0
(Any-PHY and
single channel
UL2 only*)
Optional Prepend[15:8]
Optional Prepend[7:0]
Byte 1
(Optional)
Byte 2
(Optional)
H1
Byte 3
Byte 4
Byte 5
Byte 6
Byte 7*
H2
H3
H4
HEC
PAYLOAD1
Byte 8
S
S
S
PAYLOAD48
Byte 55
Note
Sꢀ Address prepend for Single Channel UL2 may be inserted in HEC/UDF field instead of prior to the cell
For Any-PHY mode or single-PHY mode, the address prepend field encoding indicates the
virtual PHY ID. The virtual PHY ID contains 2 sections, the lower 7 bits indicates the virtual
PHY ID with valid values for 0 to 7, while the upper bits are user programmable and not used
by the device but may be required in a user’s system for unique device identification when
multiple devices exist on a bus.
For UTOPIA multi-PHY mode, the address prepend is not used.
10.1.3 Summary of Any-PHY/UTOPIA Modes
The following table summarizes the available modes of the Any-PHY/UTOPIA Interfaces.
Table 3 Available Modes of the Any-PHY/UTOPIA Interfaces
Mode Dir UL2 Single PHY
& Protocol
UL2 Multi-PHY
Any-PHY
TX Poll
Not supported
PHY Channels: 4
PHY Channels: 4
Channel Enable Register:
Channel Enable Register:
TCAEN(3:0)
TCAEN(10:0)
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2020889, Issue 2
50
PMC [ PMC-SIERRA, INC ]
