PXF4333 Datasheet, PDF (131/361 Pages) Infineon Technologies AG – ABM 3G ATM Buf fer Manager

ABM-3G
PXF 4333 V1.1
Interface Description
5.1.6.2 LCI Mapping Mode: VPI Mode
In Mapping Mode ‘VPI’, the ABM-3G expects a 12-bit local connection identifier in the
location of the VPI field. Mapping Mode ‘VPI’ is configured via bit field LCIMOD(1:0)=’00’
in Register “MODE1” on Page 312.
Table 5-5 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
UDF1
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
5.1.6.3 LCI Mapping Mode: VCI Mode
In Mapping Mode ‘VCI’, the ABM-3G expects a 16-bit local connection identifier in the
location of the VCI field. Mapping mode ‘VCI’ is configured via bit field LCIMOD(1:0)=’01’
in Register “MODE1” on Page 312.
Table 5-6 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
LCI(11:0)
2
UDF1
3
Payload Octet 1
4
Payload Octet 3
...
:
26
Payload Octet 47
LCI(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.
Data Sheet
131
2001-12-17