VSC6134
Datasheet
3.6.24
Add/Drop GCC Generator FIFO Access Register
This register provides access to a 256-word deep, 16-bit wide FIFO that holds the GCC values to be
inserted into the provisioned GCC fields. The FIFO has one configurable pointer for both read and write
operations shown in Table 178. Each time a read or write operation occurs at this address (0x819 Add or
0x299 Drop), the pointer is automatically incremented by a value as programmed in Table 178. The
FIFO holds GCC values for GCC0, GCC1, and GCC2 and should be filled as described in “GCCx
Generation,’ page 94.
Address:
0x819: Add Path
0x299: Drop Path
0x0000
Register Reset Value:
Table 177. Add/Drop GCC Generator FIFO Access Register
Reset
Value
Bit
Name
Access
Description
15:8
[ADD/DROP]_GCCG n
(n is odd)
R/W
0x00
7:0
[ADD/DROP]_GCCG n
(n is even)
R/W
0x00
3.6.25
Add/Drop GCC Generator FIFO Pointer
Address:
0x81A: Add Path
0x29A: Drop Path
0x0000
Register Reset Value:
Table 178. Add/Drop GCC Generator FIFO Pointer
Reset
Value
Bit
Name
Access
Description
15:14
[ADD/DROP]_GCCG_MPNTI
R/W
These two bits specify how many addresses the pointer
increments after each read or write operation.
01
13:6
5:0
[ADD/DROP]_GCCG_MPNT
R/W
RO
This field is a pointer to the FIFO that is accessible at the
address in Table 177, page 268. It holds the 512 GCC
values. This pointer is used for both read and write
operations and is automatically incremented after any read
or write operation by the value of bits [15:14] of this register.
0x00
Reserved
0x00
268 of 438
VMDS-10185 Revision 4.0
July 2006
VITESSE [ VITESSE SEMICONDUCTOR CORPORATION ]
