Single-Chip Ethernet Controller with HP Auto-MDIX Support and PCI Interface

Datasheet

4.3.5Transmit List Base Address Register (TX_BASE_ADDR)

Offset:

0010h

Size:

32 bits

This register specifies the start address of the transmit buffer list. TX_BASE_ADDR must be 4-DWORD (16 byte) aligned (e.g. Reserved address bits 3:0 must be 0).

BITS

DESCRIPTION

TYPE

DEFAULT

 

 

 

 

31:4

Start of Transmit List (STL)

R/W

28‘h0

 

This field points to the start of the transmit buffer descriptor list. The

 

 

 

descriptor list resides in the Host memory. Writing this register is only valid

 

 

 

when the TX DMA engine is in the stopped state. When stopped, this

 

 

 

register must be written before the START command is given.

 

 

 

 

 

 

3:0

RESERVED

RO

-

 

 

 

 

Revision 1.22 (09-25-08)

108

SMSC LAN9420/LAN9420i

 

DATASHEET