PM5381-BI PMC-Sierra, Inc., PM5381-BI Datasheet - Page 383
PM5381-BI
Manufacturer Part Number
PM5381-BI
Description
ATM UNI, Single Channel ATM PHY Interface for 2488.32Mbps
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5381-BI.pdf
(586 pages)
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Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2000489, Issue 4
Register 0752H: TCFP Idle/Unassigned ATM Cell Header
PAYLD[7:0]
CLP
PTI[2:0]
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 PAYLD[7:0] (Idle Cell Payload) value reflects the payload bytes which will be inserted
into the ATM Idle cell generated by the TCFP.
The CLP (Cell Loss Priority) bit contains the eighth bit position of the fourth octet of the
idle/unassigned cell pattern. Cell rate decoupling is accomplished by transmitting idle cells
when the TCFP detects that no outstanding cells are available from the external FIFO and
data is requested on the TCFP egress interface. Additionally, XOFF can be used to force the
transmission of Idle/Unassigned cells in ATM mode.
The PTI[2:0] (Payload Type) bits contain the fifth, sixth, and seventh bit positions of the
fourth octet of the idle/unassigned cell pattern. Idle cells are transmitted when the TCFP
detects that no outstanding cells are available from the external FIFO and data is requested on
the TCFP egress interface. Additionally, XOFF can be used to force the transmission of
Idle/Unassigned cells in ATM mode.
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
R/W
R/W
R/W
R/W
Function
GFC[3]
GFC[2]
GFC[1]
GFC[0]
PTI[2]
PTI[1]
PTI[0]
CLP
PAYLD[7]
PAYLD[6]
PAYLD[5]
PAYLD[4]
PAYLD[3]
PAYLD[2]
PAYLD[1]
PAYLD[0]
S/UNI-2488 Telecom Standard Product Datasheet
Default
0
0
0
0
0
0
0
1
0
1
1
0
1
0
1
0
Released
383
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