LAN89730 datasheet(48/218 Pages) MICROCHIP

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LAN89730

DS60001348A-page 48

 2013-2015 Microchip Technology Inc.

4.3.3.3

Get Statistics Command

The Get Statistics Command returns the entire contents of the statistics RAMs. The wIndex field is used to select the

RX or TX statistics.

Note 4-18

0b - Retrieves RX statistics. 1b - Retrieves TX statistics.

Note 4-19

28h for RX statistics. 30h for TX statistics.

Note:

The contents of the statistics RAM is snapshot when fulfilling the command request. The statistics counters

rollover, hence the RAM is not cleared.

TABLE 4-37:

FORMAT OF GET STATISTICS SETUP STAGE

Offset

Field

Value

bmRequestType

C0h

bRequest

A2h

wValue

00h

wIndex

Note 4-18

wLength

Note 4-19

TABLE 4-38:

FORMAT OF GET STATISTICS DATA STAGE (RX)

Offset

Field

00h

RX Good Frames

04h

RX CRC Errors

08h

RX Runt Frame Errors

0Ch

RX Alignment Errors

10h

RX Frame Too Long Error

14h

RX Later Collision Error

18h

RX Bad Frames

1Ch

RX FIFO Dropped Frames

20h

RESERVED

24h

RESERVED

TABLE 4-39:

FORMAT OF GET STATISTICS DATA STAGE (TX)

Offset

Field

00h

TX Good Frames

04h

TX Pause Frames

08h

TX Single Collisions

0Ch

TX Multiple Collisions

10h

TX Excessive Collision Errors

14h

TX Late Collision Errors

18h

TX Buffer Underrun Errors

1Ch

TX Excessive Deferral Errors

20h

TX Carrier Errors

24h

TX Bad Frames

28h

RESERVED

2Ch

RESERVED

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