LAN9313 Datasheet, PDF (37/398 Pages) SMSC Corporation – Three Port 10/100 Managed Ethernet Switch with MII

Three Port 10/100 Managed Ethernet Switch with MII
Datasheet
Note 3.9
Configuration strap values are latched on power-on reset or nRST de-assertion.
Configuration strap pins are identified by an underlined symbol name. Some configuration
straps can be overridden by values from the EEPROM Loader. Refer to Section 4.2.4,
"Configuration Straps," on page 45 for more information.
Note 3.10 In MAC mode, this strap is not used. In this mode, the Virtual PHY is not applicable, and
full-duplex flow control must be controlled manually by the host, based upon the external
PHYs Auto-negotiation results.
Table 3.6 EEPROM Pins
BUFFER
PIN
NAME
SYMBOL
TYPE
DESCRIPTION
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.
96
EEPROM I²C
EE_SDA
IS/OD8 EEPROM I²C Serial Data Input/Output
Serial Data
Input/Output
(EE_SDA): In I²C EEPROM mode
(EEPROM_TYPE = 1), this pin is the I²C EEPROM
serial data input/output.
EEPROM
Microwire
Data Output
EEDO
98
O8
EEPROM Microwire Data Output: In Microwire
EEPROM mode (EEPROM_TYPE = 0), this pin is
the Microwire EEPROM serial data output.
Note: In I²C mode (EEPROM_TYPE=1), this pin
is not used and is driven low.
EEPROM
Type Strap
EEPROM_TYPE
IS
Note 3.11
EEPROM Type Strap: Configures the EEPROM
type. See Note 3.12
0 = Microwire Mode
1 = I²C Mode
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 I²C
EE_SCL
IS/OD8 EEPROM I²C Serial Clock (EE_SCL): In I²C
Serial Clock
99
EEPROM mode (EEPROM_TYPE=1), this pin is
the I²C EEPROM clock input/open-drain output.
EEPROM
Size Strap 1
EEPROM_SIZE_1
IS
Note 3.13
EEPROM Size Strap 1: Configures the high bit of
the EEPROM size range as specified in Section
8.2, "I2C/Microwire Master EEPROM Controller,"
on page 101. This bit is not used for I²C
EEPROMs. See Note 3.12.
EEPROM
Microwire
Chip Select
101
EECS
O8
EEPROM Microwire Chip Select: In Microwire
EEPROM mode (EEPROM_TYPE = 0), this pin is
the Microwire EEPROM chip select output.
Note: In I²C mode (EEPROM_TYPE=1), this pin
is not used and is driven low.
EEPROM
Size Strap 0
EEPROM_SIZE_0
IS
Note 3.11
EEPROM Size Strap 0: Configures the low bit of
the EEPROM size range as specified in Section
8.2, "I2C/Microwire Master EEPROM Controller,"
on page 101. See Note 3.12.
Note 3.11 The IS buffer type is valid only during the time specified in Section 14.5.2, "Reset and
Configuration Strap Timing," on page 390.
Note 3.12 Configuration strap values are latched on power-on reset or nRST de-assertion.
Configuration strap pins are identified by an underlined symbol name. Refer to Section
4.2.4, "Configuration Straps," on page 45 for more information.
SMSC LAN9313/LAN9313i
37
DATASHEET
Revision 1.2 (04-08-08)