Table 3.5 eeprom pins, Eeprom pins, Datasheet – SMSC LAN9312 User Manual
Page 31
High Performance Two Port 10/100 Managed Ethernet Switch with 32-Bit Non-PCI CPU Interface
Datasheet
SMSC LAN9312
31
Revision 1.4 (08-19-08)
DATASHEET
Note: Refer to
Chapter 8, "Host Bus Interface (HBI)," on page 99
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 LAN9312 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
Section 14.1.3, "Direct FIFO Access
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
Chapter 8, "Host Bus Interface (HBI)," on page 99
for additional information.
Table 3.5 EEPROM Pins
PIN
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION
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
EEPROM I
2
C Serial Data Input/Output
(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.
Note:
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
0 = Microwire Mode
1 = I
2
C Mode
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
EEPROM I
2
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
10.2, "I2C/Microwire Master EEPROM Controller,"
on page 137
. This bit is not used for I
2
C
EEPROMs. See
Table 3.4 Host Bus Interface Pins (continued)
PIN
NAME
SYMBOL
BUFFER
TYPE
DESCRIPTION