PM6344 datasheet(69/256 Pages) PMC

69 / 256 page

STANDARD PRODUCT

PMC-Sierra, Inc.

PM6344 EQUAD

PMC-951013

ISSUE 5

QUADRUPLE E1 FRAMER

Bit

Type

Function

Default

Bit 7

R/W

RCLKOSEL

Bit 6

Unused

Bit 5

R/W

RXDMAGAT

Bit 4

R/W

ROHM

Bit 3

R/W

BRX2RAIL

Bit 2

R/W

BRXSMFP

Bit 1

R/W

BRXCMFP

Bit 0

R/W

OOSMFAIS

This register allows software to configure the Receive backplane interface

format.

RCLKOSEL:

The RCLKOSEL bit selects the source of the RCLKO[x] output and the

internal elastic store output clock. If RCLKOSEL is a logic zero, RCLKO[x] is

the recovered clock derived from RDP[x] and RDN[x] or RCLKI[x] and the

internal elastic store output clock is BRCLK. If RCLKOSEL is a logic one,

RCLKO[x] and the internal elastic store output clock originate from the

smooth 2.048 MHz clock generated by the DJAT phase locked loop. If the

recovered clock is selected as the PLL reference, the configuration

implements jitter attenuation in the receive direction. See the Operations

Section for details on this application. TRSLIP must be set to logic 0.

RXDMAGAT:

The RXDMAGAT bit selects the gating of the RDLINT[x] output with the

RDLEOM[x] output when the internal HDLC receiver is used with DMA. When

RXDMAGAT is set to logic 1, the RDLINT[x] DMA output is gated with the

RDLEOM[x] output so that RDLINT[x] is forced to logic 0 when RDLEOM[x] is

logic 1. When RXDMAGAT is set to logic 0, the RDLINT[x] and RDLEOM[x]

outputs operate independently.

BRX2RAIL:

The BRX2RAIL bit selects whether the backplane receive data signal on the

multifunction outputs BRPCM/BRDP[x] and BRSIG/BRDN[x] are in either dual

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