PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Register 0750H: TCFP Configuration
Bit
Type
Function
Default
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
R/W
R/W
R/W
FIFO_ERRE
FIFO_UDRE
XFERE
0
0
0
X
0
0
0
0
1
1
0
0
0
0
1
0
Unused
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Reserved
Reserved
Reserved
POS_SEL
CRC_SEL[1]
CRC_SEL[0]
FLAG[3]
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
FLAG[2]
Bit 3
FLAG[1]
Bit 2
FLAG[0]
Bit 1
SCRMBL
PROV
Bit 0
PROV:
The processor provision bit (PROV) is used to enable the TCFP. When PROV is logic 0, the
TCFP ATM and packet processors are disabled and will not request data from the TXSDQ
FIFO interface and will respond to data requests with all 1’s data. When PROV is logic 1, the
TCFP ATM or packet processor is enabled and will respond to data requests with valid data
after requesting and processing data from the TXSDQ FIFO interface.
SCRMBL:
The SCRMBL bit controls the scrambling of the packet data stream or ATM cell payload.
When SCRMBL is a logic 1, scrambling is enabled. When SCRMBL is a logic 0, scrambling
is disabled.
FLAG[3:0]:
The flag insertion control (FLAG[3:0]) configures the minimum number of flag bytes the
packet processor inserts between packets. The minimum number of flags (01111110)
inserted between packets is shown in the table below. FLAG[3:0] are used only in POS
mode.
Table 11: Selection of the number of Flag Bytes
FLAG[3:0]
Minimum Number of FLAG Bytes
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
325
PMC [ PMC-SIERRA, INC ]
