PM3350-SW datasheet(190/224 Pages) PMC

190 / 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

188

Bit

Type

Function

Default

Unused

MERR

R/W

MERGE

R/W

BSWP

11:10

Unused

9:8

R/W

CMD

7:0

R/W

BYTECOUNT

MERR:

PCI Bus Interface logic Master Error status.

MERGE:

this is the value of the `merge' bit in the command word written to the

PCI_BIU MWF/MCF FIFO. It must be written to a logic 0 for correct device

operation (a PCI bus transaction master abort will occur if the bit is incorrectly

written to a logic 1).

BSWP:

this is the value of the `byteswap' bit in the command word written to the

MWF/MCF FIFO. Byte-swap swaps the way that bytes are presented on the

PCI bus (refer to description on Byte Ordering for additional details).

CMD[1:0]:

Defines type of transfer to be performed.

• 00 - memory read command

• 01 - memory write command

• 10 - configuration read command

• 11 - configuration write commands

BYTECOUNT[7:0]:

Byte count of PCI transaction. When non-zero, a PCI transaction will be

initiated.

PM3350-SW Datasheet(PDF) 190 Page - PMC-Sierra, Inc

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