T8207 Datasheet, PDF (127/158 Pages) Agere Systems – ATM Interconnect

Advance Data Sheet
September 2001
CelXpres T8207
ATM Interconnect
14 Registers (continued)
Table 103. LUT X Configuration 1 Structure (LUTXCF1) (0704h to 077Ch)
Name
lutX_vpi_base
Offset Bit Pos. Type
00h
15:0
RW
Reset
X
Description
LUT X VPI Base Address. These bits define bits 3
through 18 of the VPI base address offset in look-up
table X. The offset may be a maximum of 19 bits. If
16-byte records are used, the least significant bit of this
word is ignored.
Note: When 16 or less PHY ports are used, each PHY
port has its own look-up table memory space.
For 16 or less PHY ports, PHY port 0 uses
LUT 0 memory space, PHY port 1 uses LUT 1
memory space, and so on. When greater than
16 PHY ports are used, even and odd PHY ports
must share the look-up memory space. For
greater than 16 PHY ports, PHY ports 0 and 1
use LUT 0 memory space, PHY ports 2 and 3
use LUT 1 memory space, PHY ports 4 and 5
use LUT 2 memory space, and so on.
lutX_vpi_mask 02h
11:0
LUT X VPI Mask. This 12-bit field is used to mask the
incoming VPI bits. If a bit in the field is set to ‘1,’ the
corresponding incoming VPI bit will be used to address
the VPI record in the look-up table. All other incoming
VPI bits will be ignored.
lutX_vpi_chk
12
LUT X VPI Check. If this bit is set to ‘1,’ the unused
incoming VPI bits must be ‘0,’ or the cell will be
counted as misrouted. Unused bits are bits whose cor-
responding lutX_vpi_mask bit equal zero.
lutX_uni_en
13
LUT X User Network Interface (UNI) Enable. If this
bit is set to ‘1,’ the port is identified as UNI, and the
GFC field of the cell header will not be used in the look-
up table. If this bit is ‘0,’ the port is identified as NNI.
Reserved
15:14
Reserved.
The letter X in the data structure name and in the bit names represents the values 0 through 15 for the 16 look-up
table configurations. The base addresses of the 16 data structures are shown below.
Structure Name
Base Address
Structure Name
Base Address
LUT 0 configuration 1
0704h
LUT 8 configuration 1
0744h
LUT 1 configuration 1
070Ch
LUT 9 configuration 1
074Ch
LUT 2 configuration 1
0714h
LUT 10 configuration 1
0754h
LUT 3 configuration 1
071Ch
LUT 11 configuration 1
075Ch
LUT 4 configuration 1
0724h
LUT 12 configuration 1
0764h
LUT 5 configuration 1
072Ch
LUT 13 configuration 1
076Ch
LUT 6 configuration 1
0734h
LUT 14 configuration 1
0774h
LUT 7 configuration 1
073Ch
LUT 15 configuration 1
077Ch
Agere Systems Inc.
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