High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface

Datasheet

14.5.4.3Buffer Manager Flow Control Pause Level Register (BM_FC_PAUSE_LVL)

Register #:

1C02h

Size:

32 bits

This register configures the buffer usage level when a Pause frame or backpressure is sent.

BITS

 

DESCRIPTION

TYPE

DEFAULT

 

 

 

 

31:16

RESERVED

RO

-

 

 

 

 

15:8

Pause Level Low

R/W

21h

 

These bits specify the buffer usage level during times when 2 or 3 ports are

 

 

 

active.

 

 

 

 

Each buffer is 128 bytes.

 

 

 

Note:

A port is “active” when 36 buffers are in use for that port.

 

 

 

 

 

 

7:0

Pause Level High

R/W

3Ch

 

These bits specify the buffer usage level during times when 1 port is active.

 

 

 

Each buffer is 128 bytes.

 

 

 

Note:

A port is “active” when 36 buffers are in use for that port.

 

 

 

 

 

 

 

SMSC LAN9312

413

Revision 1.4 (08-19-08)

 

DATASHEET