VSC6134
Datasheet
3.6.20
Add/Drop FTFL Generator FIFO Access Register
This register provides access to a 128-word deep, 16-bit wide FIFO that holds the FTFL values to be
inserted into the provisioned FTFL field. The FIFO has one configurable pointer for both read and write
operations shown in Table 174, page 266. Each time a read or write operation occurs at this address
(0x815 Add or 0x295 Drop), the pointer is automatically incremented by 1. T he value n is in the range
from 0 to 255 and each of the 128 registers in the FIFO contains two 8-bit values for FTFL. The values
that reside in the FIFO’s 256 eight-bit fields are the values that are inserted into the outgoing FTFL field
on a rotating basis. The 256-byte FTFL signal is aligned with the OTU multiframe (MFAS). Byte 0 of
the 255-byte FTFL signal is present at OTU multiframe position 00.
Address:
0x815: Add Path
0x295: Drop Path
0x0000
Register Reset Value:
Table 173. Add/Drop FTFL Generator FIFO Access Register
Reset
Value
Bit
Name
Access
Description
15:8
[ADD/DROP]_FTFL_GEN n
(n is odd)
R/W
The value at bits 15-8 of address 0x7F of the FIFO
represents FTFL 255.
0x00
7:0
[ADD/DROP]_FTFL_GEN n
(n is even)
R/W
The value of bits 7-0 of address 0x00 of the FIFO
represents FTFL 0.
0x00
3.6.21
Add/Drop PSI/FTFL Generator FIFO Pointer Values
Address:
0x816: Add Path
0x296: Drop Path
0x0000
Register Reset Value:
Table 174. Add/Drop PSI/FTFL Generator FIFO Pointer Values
Reset
Value
Bit
Name
Access
Description
15:9
[ADD/
R/W
This field is a pointer to the address of the FIFO in
Table 173 that holds the 256 FTFL values. This pointer is
used for both read and write operations and is
automatically incremented by 1 after any read or write
operation.
0x00
DROP]_FTFL_GEN_PNT[6:0]
8
Reserved
RO
0
7:1
[ADD/DROP]_PSI_GEN_PNT[6:0]
R/W
This field is a pointer to the address of the FIFO in
Table 172 that holds the 256 PSI values. This pointer is
used for both read and write operations and is
automatically incremented by 1 after any read or write
operation.
0x00
0
Reserved
RO
0
266 of 438
VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
