VT6516 datasheet(62/73 Pages) ETC

62 / 73 page

VIA Technologies, Inc.

Preliminary VT6516 Datarsheet

-62-

03H

MAC media type configuration

bit 0: SPD_10M , value 0: 100Mbps, value 1: 10Mbps

bit 1: HALF_DPX , 1: half duplex, 0: full duplex

bit 2: RCV_FC_DIS , 1: disable receive flow control frame

0: enable receive flow control frame

bit 3: XMT_FC_DIS , 1: disable send flow control frame

0: enable send flow control frame

MACCFG [3:0] 0

04H

IO port enable

bit 0: input port enable , 1: input enable, 0: input

disable

bit 1: output port enable , 1: output enable, 0:

output disable

IO_CFG

[1:0] 0

10H-

13H

received good packet count

Accounting Event: receiving packets with CRC ok

and packet size between 64 and 1522 (valid

maximum packet size in spite of VLAN disabled or

enabled). Note that the RMON/MIB counter will be

locked during 4-byte continuous register-read, and

the increment (if any) is deferred until read

complete.

RCV_GO

OD_PKT

[31:0

]

R/O

14H-

17H

received bad packet count

Formal Definition: "The number of inbound packets

that contained errors preventing them from being

deliverable to a higher-layer protocol."

Accounting Events: (1) receiving valid-length

packets with CRC error, (2) receiving runt packets,

(3) receiving over-length packets

RCV_BAD

_PKT

[31:0

]

R/O

18H-

1BH

drop packet counter

Formal Definition: "The total number of events in

which packets were dropped by the probe due to

lack of resources. Note that this number is not

necessarily the number of packets dropped; it is just

the number of times this condition has been

detected."

Accounting Event: input FIFO overrun due to

SDRAM-bandwidth blocking or buffer starvation.

DROP_PK

[31:0

]

R/O

1CH-

1FH

sent good packet count

Accounting Event: store-and-forward transmission

success without collision

XMT_GO

OD_PKT

[31:0

]

R/O

VT6516 Datasheet(PDF) 62 Page - List of Unclassifed Manufacturers

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