PM5380-BI PMC-Sierra, Inc., PM5380-BI Datasheet - Page 219
PM5380-BI
Manufacturer Part Number
PM5380-BI
Description
Network Interface, SATURN User Network Interface (8x155) Telecom Standard Product
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5380-BI.pdf
(440 pages)
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Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC- 2010299, Issue 2
Register 0x060, 0x160, 0x260, 0x360, 0x460, 0x560, 0x660, 0x760:
HCSADD:
HDSCR:
DDSCR:
Reserved:
RXCP Configuration 1
The HCSADD bit controls the addition of the coset polynomial, x
octet prior to comparison. When HCSADD is a logic one, the polynomial is added, and the
resulting HCS is compared. When HCSADD is a logic zero, the polynomial is not added,
and the unmodified HCS is compared.
HDSCR enables the self-synchronous x
bytes which should contain the ATM cell headers. When HSCR is set low, the
descrambling polynomial will function only over the ATM payload bytes. When HDSCR is
set high, the descrambling polynomial will function over all bytes, including the 5 ATM
header bytes. This function is available for use with PPP packets and flags which are
scrambled at the source to prevent the generation of “killer” sequences.
The DDSCR bit controls the descrambling of the cell payload with the polynomial x
When DDSCR is set high, cell payload descrambling is disabled. When DDSCR is set low,
payload descrambling is enabled.
The reserved bits must be programmed to logic zero for proper operation.
Bit
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Type
R/W
R/W
R/W
R/W
Function
DDSCR
HDSCR
Unused
Unused
Unused
HCSADD
Reserved
Unused
S/UNI®-8x155 ASSP Telecom Standard Product Data Sheet
43
+ 1 descrambler to continue running through the
Default
0
0
X
X
X
1
0
X
6
+x
4
+x
2
+1, to the HCS
Released
43
+ 1.
219
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