PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 367

• Manufacturer Part Number: PM5381-BI
• Description: ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
Register 0743H: RCFP Minimum Packet Length
All Reserved bits must be set to their default values for proper operation.
RBY_MODE
MINPL[7:0]
Bit
Bit 15
Bit 14
Bit 13
Bit 12
Bit 11
Bit 10
Bit 9
Bit 8
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
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. For correct counting, RBY_MODE must be set when using the DELINDIS mode in
register 0740H.
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. If STRIP_SEL in register 0740H is
set to logic 1, then MINPL should be set to at least 4 plus the number of CRC bytes – i.e.
either 6 or 8. If STRIP_SEL is logic 0, then MINPL should be set to a value greater than or
equal to 5.
Type
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Function
MINPL[7]
MINPL[6]
MINPL[5]
MINPL[4]
MINPL[3]
MINPL[2]
MINPL[1]
MINPL[0]
Unused
Unused
Unused
Unused
RBY_MODE
Reserved
Reserved
Reserved
S/UNI-2488 Telecom Standard Product Datasheet
Default
0
0
0
0
0
1
0
0
X
X
X
X
0
0
1
0
Released
367