T8207 Datasheet, PDF (39/158 Pages) Agere Systems – ATM Interconnect

Advance Data Sheet
September 2001
8 Look-Up Table (continued)
CelXpres T8207
ATM Interconnect
ROUTING LOOK-UP MEMORY MAP
OAM CELL ROUTING PORT X RECORD MAP
0000h
0400h
0800h
0C00h
1000h
1400h
1800h
1C00h
2000h
2400h
2800h
2C00h
3000h
3400h
3800h
3C00h
4000h
7FFFFh
OAM CELL ROUTING PORT 0 AND 1
OAM CELL ROUTING PORT 2 AND 3
OAM CELL ROUTING PORT 4 AND 5
OAM CELL ROUTING PORT 6 AND 7
OAM CELL ROUTING PORT 8 AND 9
OAM CELL ROUTING PORT 10 AND 11
OAM CELL ROUTING PORT 12 AND 13
OAM CELL ROUTING PORT 14 AND 15
OAM CELL ROUTING PORT 16 AND 17
OAM CELL ROUTING PORT 18 AND 19
OAM CELL ROUTING PORT 20 AND 21
OAM CELL ROUTING PORT 22 AND 23
OAM CELL ROUTING PORT 24 AND 25
OAM CELL ROUTING PORT 26 AND 27
OAM CELL ROUTING PORT 28 AND 29
OAM CELL ROUTING PORT 30 AND 31
ANY PURPOSE LOOK-UP MEMORY
SHARED BETWEEN EACH OF THE
16 PAIRS OF PORTS
+0000h
+01F0h
+0200h
+0210h
+0220h
+0230h
+0240h
+0250h
+0260h
+03F0h
VP OAM VCI = 0 (F4)
•
•
•
VP OAM VCI = 31 (F4)
VP OAM VCI = 6 & PT = “110” (F4) (RM-VPC)
VC OAM PTI = “100” (F5)
VC OAM PTI = “101” (F5)
VC OAM PTI = “110” (F5)
VC OAM PTI = “111” (F5)
RESERVED
RESERVED
•
•
•
RESERVED
Figure 10. Translation RAM Memory Map—Extended Mode, for Greater than 16 Ports
The OAM/RM translation records at the bottom of the memory map now use 16 Kbytes of memory when the device
is configured to support 16 to 32 MPHY ports, and the base addresses for the OAM records are now calculated
using the following equation for 16 or less ports:
OBA = PN × 16 × 64
In this equation, OBA is the OAM base address, PN is the port number (for up to 16 ports), 16 is the number of
bytes per record, and 64 is the number of records per port.
For 16-byte records, when greater than 16 ports are used, the base addresses of the OAM records are calculated
from the following equation:
OBA = INT(PN/2) × 16 × 64
In this equation, OBA is the OAM base address, PN is the port number (for greater than 16 ports), 16 is the number
of bytes per record, and 64 is the number of records per port. The INT function specifies that the term within the
parentheses is an integer, i.e., the fractional part is discarded.
Agere Systems Inc.
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