PM3350-SW datasheet(180/224 Pages) PMC

180 / 224 page

ELAN 8X10

PM3350 ELAN 8 X10

DATA SHEET

PMC-970109

ISSUE 3

8 PORT ETHERNET SWITCH

PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND PMC-SIERRA, INC. CUSTOMERS ONLY

178

Bit

Type

Function

Default

Bit 15 to 0

R/W

FLIST[15:0]

Bit

Type

Function

Default

Bit 15 to 8

Unused

Bit 7 to 0

R/W

FLIST[23:16]

FLIST[23:0]:

The freelist pointer locates the head of the linked list of free packet buffers

within the local memory. These registers are modified by either writes by the

RISC or by the DMA upon transfer of the packet buffer.

The on-chip memory interface contains several registers that are accessible

over the PCI bus via the two registers MREG_ADDR and MREG_DATA. The

user writes the applicable register select value to the MREG_ADDR register

and then performs a read (or write) to the MREG_DATA register to perform a

PCI bus read (or write) operation to the target register.

These registers are accessible by the PCI expansion bus. Refer to the PCI

Accessible Registers section for details on the use of these registers.

Bit

Type

Function

Default

Bit 15

REQID_VALID

Bit 14

REQ_INT

Bit 13 to 7

Unused

Bit 6 to 4

REQID_NUM[2:0]

0x7

Bit 3 to 0

Unused

REQID_VALID:

Valid bit - there is a Request pending. Qualifies REQID_NUM.

PM3350-SW Datasheet(PDF) 180 Page - PMC-Sierra, Inc

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