SMSC LAN9311 Manual De Usuario

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

SMSC LAN9311/LAN9311i

31

Revision 1.4 (08-19-08)

 

Note: Refer to 

 for additional information regarding

the use of these signals.

60

Data FIFO 

Direct Access 

Select

FIFO_SEL

IS

Data FIFO Direct Access Select: When driven 
high, all accesses to the LAN9311/LAN9311i are 
directed to the RX and TX Data FIFO’s. All reads 
are from the RX Data FIFO, and all writes are to 
the TX Data FIFO. In this mode, the address input 
is ignored. Refer to 

 for additional 

information.

61

Endianess 

Select

END_SEL

IS

Endianess Select: When this signal is set high, 
big endian mode is selected. When low, little 
endian mode is selected. This signal may be 
dynamically changed or held static. Refer to 

for additional information.

96

EEPROM 
Microwire 

Data Input

EEDI

 IS

(PD)

EEPROM Microwire Data Input (EEDI): In 
Microwire EEPROM mode (EEPROM_TYPE = 0), 
this pin is the Microwire EEPROM serial data input. 

EEPROM I

2

C 

Serial Data 

Input/Output

EE_SDA

IS/OD8

(EE_SDA): In I

2

C EEPROM mode 

(EEPROM_TYPE = 1), this pin is the I

2

C EEPROM 

serial data input/output.

98

EEPROM 
Microwire 

Data Output

EEDO

O8

EEPROM Microwire Data Output: In Microwire 
EEPROM mode (EEPROM_TYPE = 0), this pin is 
the Microwire EEPROM serial data output. 

In I

2

C mode (EEPROM_TYPE=1), this pin 

is not used and is driven low.

EEPROM 

Type Strap

EEPROM_TYPE

IS

EEPROM Type Strap: Configures the EEPROM 
type. See 

99

EEPROM 
Microwire 

Serial Clock

EECLK

O8

EEPROM Microwire Serial Clock (EECLK): In 
Microwire EEPROM mode (EEPROM_TYPE = 0), 
this pin is the Microwire EEPROM clock output.

EEPROM I

2

C 

Serial Clock

EE_SCL

IS/OD8

C Serial Clock (EE_SCL): In I

2

C 

EEPROM mode (EEPROM_TYPE=1), this pin is 
the I

2

C EEPROM clock input/open-drain output.

EEPROM 

Size Strap 1

EEPROM_SIZE_1

IS

EEPROM Size Strap 1: Configures the high bit of 
the EEPROM size range as specified in 

. This bit is not used for I

2

C 

EEPROMs. See