PMC-Sierra, Inc.
PRELIMINARY
PM5381 S/UNI-2488
DATASHEET
PMC-2000489
ISSUE 1
SATURN USER NETWORK INTERFACE FOR 2488 MBIT/S
Register 0743H: RCFP Minimum Packet Length
Bit
Type
Function
Default
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
MINPL[7]
MINPL[6]
MINPL[5]
MINPL[4]
MINPL[3]
MINPL[2]
MINPL[1]
MINPL[0]
Unused
0
0
0
0
0
1
0
0
X
X
X
X
0
0
1
0
Bit 8
Bit 7
Bit 6
Unused
Bit 5
Unused
Bit 4
Unused
Bit 3
R/W
R/W
R/W
R/W
RBY_MODE
Reserved
Reserved
Reserved
Bit 2
Bit 1
Bit 0
Reserved:
The Reserved bits should be set to their default values for proper operation.RBY_MODE:
The receive byte counter mode (RBY_MODE) bit is used to select the mode in which the
RBY_IC[39:0] counters work. When RBY_MODE is logic 0, RBY_IC[39:0] will count all bytes
in received packets (including FCS and Abort bytes) after the byte destuffing operation.
When RBY_MODE is logic 1, RBY_IC[39:0] will count all bytes in received packets (including
FCS, Abort, and stuff bytes) before the byte destuffing operation. Flag bytes will not be
counted in either case. The RBY_MODE bit is only valid when working in POS mode.
MINPL[7:0]:
The Minimum Packet Length (MINPL[7:0]) bits are used to set the minimum packet length.
Packets smaller than this length are marked with an error. The packet length used here is
defined as the number of bytes encapsulated into the POS frame after destuffing but
including the FCS. The default minimum packet length is 4 octets. Values smaller than 4
should not be used.
Proprietary and Confidentail to PMC-Sierra Inc., and for its Customer’s Internal Use
314
PMC [ PMC-SIERRA, INC ]
