PMC-Sierra PM5349 Register 0x60 Rxcp Configuration Bit Type Function Default, Discor, Hcsadd

PMC-Sierra, Inc.

S/UNI-QUAD

DATASHEET

PM5349 S/UNI-QUAD

PMC-971239 ISSUE 6 SATURN USER NETWORK INTERFACE (155-QUAD)

Register 0x60: RXCP Configuration 1

Bit	Type	Function	Default
Bit 7	R/W	DDSCR	0
Bit 6	R/W	Reserved	0
Bit 5		Unused	X
Bit 4		Unused	X
Bit 3		Unused	X
Bit 2	R/W	HCSADD	1
Bit 1	R/W	Reserved	0
Bit 0	R/W	DISCOR	0

DISCOR:

The DISCOR bit controls the HCS error correction algorithm. When DISCOR is a logic zero, the error correction algorithm is enabled, and single-bit errors detected in the cell header are corrected. When DISCOR is a logic one, the error correction algorithm is disabled, and any error detected in the cell header is treated as an uncorrectable HCS error.

HCSADD:

The HCSADD bit controls the addition of the coset polynomial, x6+x4+x2+1, to the HCS 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.

DDSCR:

The DDSCR bit controls the de-scrambling of the cell payload with the polynomial x43 + 1. When DDSCR is set to logic one, cell payload de- scrambling is disabled. When DDSCR is set to logic zero, payload de- scrambling is enabled.

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