PM7375-SC datasheet(94/430 Pages) PMC

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PM7375 LASAR-155

DATA SHEET

PMC-931127

ISSUE 6

LOCAL ATM SAR & PHYSICAL LAYER

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE

9.14.8.1

Fig. 9.15 RPDRF and RPDRR Queues

RQB [3 1 :2 ] = Rx Queue Bas e r egi s t er

RPDRRQS [1 5 :0 ]

= RPDR Ready Queue S t ar t r egi s t er

RPDRRQW[1 5 :0 ] = RPDR Ready Queue Wr i t e r egi s t er

RPDRRQR[1 5 :0 ]

= RPDR Ready Queue Read r egi s t er

RPDRRQE[1 5 :0 ]

= RPDR Ready Queue End r egi s t er

Receive Packet Descriptor (RPD) Referance Queues

Base Address:

Index Registers:

Ready Queue:

RPDRS F QS [1 5 :0 ] = RPDR S mal l F r eeQueueS t ar t r egi s t er

RPDRS F QW[1 5 :0 ] = RPDR S mal l F r ee Queue Wr i t e r egi s t er

RPDRS F QR[1 5 :0 ] = RPDR S mal l F r ee Queue Read r egi s t er

RPDRS F QE[1 5 :0 ] = RPDR S mal l F r ee Queue End r egi s t er

Large Buffer Free Queue:

Small Buffer Free Queue:

RPDRL F QS [1 5 :0 ] = RPDR L ar ge F r ee Queue S t ar t r egi s t er

RPDRL F QW[1 5 :0 ] = RPDR L ar ge F r ee Queue Wr i t e r egi s t er

RPDRL F QR[1 5 :0 ] = RPDR L ar ge F r ee Queue Read r egi s t er

RPDRL F QE[1 5 :0 ] = RPDR L ar ge F r ee Queue End r egi s t er

Base Address

+ Index Register

-------------------------

PCI Address

RQB[31:2]

Index[15:0]

AD[31:0]

Rx Packet Des cript or Reference Queue Memor y Map

RQB

Bi t 0

Bi t 3 1

Stat us + RPDR

RPDR

Valid RPDR. Only the least

significant 16 bits are

valid.

Stat us + RPDR

St at us + RPDR

Stat us + RPDR

256KB

RPD Reference Queues

PCI Host Memory

RPDRRQS

RPDRRQW

RPDRRQR

RPDRRQE

RPDRL F QS

RPDRL F QW

RPDRL F QR

RPDRL FQE

RPDRS F QS

RPDRS F QW

RPDRS FQR

RPDRS F QE

Stat us + RPDR

RPDR

PM7375-SC Datasheet(PDF) 94 Page - PMC-Sierra, Inc

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