SMSC LAN9311 Manual De Usuario

Two Port 10/100 Managed Ethernet Switch with 16-Bit Non-PCI CPU Interface

Revision 1.4 (08-19-08)

302

SMSC LAN9311/LAN9311i

 

This read/write register is used to control the special modes of the Port x PHY.

This register is re-written by the EEPROM Loader following the release of reset or a RELOAD
command. Refer to 

 for more information.

Register bits designated as NASR are reset when the Port x PHY Reset is generated via
the 

. The NASR designation is only applicable when

t h e  

  b i t   o f   t h e  

 is set.

The default value of this field is determined by a combination of the configuration straps
autoneg_strap_x, speed_strap_x, and duplex_strap_x. If the autoneg_strap_x is 1, then
the default MODE[2:0] value is 111b. Else, the default value of this field is determined by
the remaining straps. MODE[2]=0, MODE[1]=(speed_strap_1 for Port 1 PHY,
speed_strap_2 for Port 2 PHY), and MODE[0]=(duplex_strap_1 for Port 1 PHY,
duplex_strap_2 for Port 2 PHY). Configuration strap values are latched upon the de-
assertion of a chip-level reset as described in 

. Refer to 

Section 4.2.4, "Configuration Straps," on page 40

 for configuration strap

definitions.

The default value of this field is determined by the phy_addr_sel_strap configuration strap.
Refer to 

 for additional information.

Index (decimal):

18

Size:

16 bits

15:8

RO

-

7:5

PHY Mode (MODE[2:0])
This field controls the PHY mode of operation. Refer to 

 for a 

definition of each mode.

R/W

4:0

PHY Address (PHYADD)
The PHY Address field determines the MMI address to which the PHY will 
respond and is also used for initialization of the cipher (scrambler) key. Each 
PHY must have a unique address. Refer to 

 for additional information.

No check is performed to ensure that this address is unique from 
the other PHY addresses (Port 1 PHY, Port 2 PHY, and Virtual 
PHY).

R/W

NASR

000

10BASE-T Half Duplex. Auto-negotiation disabled.

0000

N/A

001

10BASE-T Full Duplex. Auto-negotiation disabled.

0001

N/A

010

100BASE-TX Half Duplex. Auto-negotiation 
disabled. CRS is active during Transmit & Receive.

1000

N/A