PXF4333 Datasheet, PDF (132/361 Pages) Infineon Technologies AG – ABM 3G ATM Buf fer Manager

ABM-3G
PXF 4333 V1.1
Interface Description
5.1.6.4 LCI Mapping Mode: Infineon Mode
In Mapping Mode ‘Infineon’, the ABM-3G expects a 16-bit local connection identifier in
the location of the VPI field and the UDF1 byte as shown below. Mapping Mode ‘Infineon’
is configured via bit field LCIMOD(1:0)=’10’ in Register “MODE1” on Page 312.
Table 5-7 Standardized UTOPIA Level 2 Cell Format (16-bit)
bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0
LCI(11:0)
1
VCI(11:0)
2
LCI(13:12)
transparent
LCI(15:14)
3
Payload Octet 1
4
Payload Octet 3
...
:
26
Payload Octet 47
VCI(15:12)
PT(2:0) ^CLP
UDF2
Payload Octet 2
Payload Octet 4
:
Payload Octet 48
Since the ABM-3G supports 16 K connections, the MSB bits 15 and 14 of the LCI must
match the selected quarter segment. Otherwise the cells are automatically forwarded to
the global real time bypass queue (Queue 0) and may be handled by a subsequent
ABM-3G device.
5.1.6.5 LCI Mapping Mode: Address Reduction Mode
In Mapping Mode ‘Address Reduction’, the ABM-3G generates a 16-bit local connection
identifier based on the marked bit fields. Mapping Mode ‘Address Reduction’ is
configured via bit field LCIMOD(1:0)=’11’ in Register “MODE1” on Page 312.
Table 5-8 Standardized UTOPIA Level 2 Cell Format (16-bit)
bit: 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
0
VPI(11:0)
1
VCI(11:0)
2 transp.
optional PNUT(5:0)
3
Payload Octet 1
4
Payload Octet 3
...
:
26
Payload Octet 47
VCI(15:12)
PT(2:0) ^CLP
UDF2
Payload Octet 2
Payload Octet 4
:
Payload Octet 48
Data Sheet
132
2001-12-17