LM3S8G62 Datasheet, PDF (809/1096 Pages) Texas Instruments – Stellaris® LM3S8G62 Microcontroller

OBSOLETE: TI has discontinued production of this device.
Stellaris^® LM3S8G62 Microcontroller
17.2
Signal Description
The following table lists the external signals of the Ethernet Controller and describes the function
of each. The Ethernet LED signals are alternate functions for GPIO signals and default to be GPIO
signals at reset. The column in the table below titled "Pin Mux/Pin Assignment" lists the GPIO pin
placement for the LED signals. The AFSEL bit in the GPIO Alternate Function Select (GPIOAFSEL)
register (page 431) should be set to choose the LED function. The number in parentheses is the
encoding that must be programmed into the PMCn field in the GPIO Port Control (GPIOPCTL)
register (page 448) to assign the LED0 and LED1 signals to the specified GPIO port pins. For more
information on configuring GPIOs, see “General-Purpose Input/Outputs (GPIOs)” on page 409. The
remaining signals (with the word "fixed" in the Pin Mux/Pin Assignment column) have a fixed pin
assignment and function.
Table 17-1. Ethernet Signals (100LQFP)
Pin Name
Pin Number Pin Mux / Pin Pin Type Buffer Type^a Description
Assignment
ERBIAS
41
fixed
O
Analog 12.4-kΩ resistor (1% precision) used internally for
Ethernet PHY.
LED0
59
PF3 (1)
O
TTL
Ethernet LED 0.
LED1
60
PF2 (1)
O
TTL
Ethernet LED 1.
MDIO
58
fixed
I/O
OD
MDIO of the Ethernet PHY.
RXIN
37
fixed
I
Analog RXIN of the Ethernet PHY.
RXIP
40
fixed
I
Analog RXIP of the Ethernet PHY.
TXON
46
fixed
O
TTL
TXON of the Ethernet PHY.
TXOP
43
fixed
O
TTL
TXOP of the Ethernet PHY.
XTALNPHY
17
fixed
O
Analog Ethernet PHY XTALN 25-MHz oscillator crystal
output. Leave this pin unconnected when using a
single-ended 25-MHz clock input connected to the
XTALPPHY pin.
XTALPPHY
16
fixed
I
Analog Ethernet PHY XTALP 25-MHz oscillator crystal
input or external clock reference input.
a. The TTL designation indicates the pin has TTL-compatible voltage levels.
Table 17-2. Ethernet Signals (108BGA)
Pin Name
ERBIAS
Pin Number Pin Mux / Pin
Assignment
K3
fixed
LED0
LED1
MDIO
RXIN
RXIP
TXON
TXOP
XTALNPHY
J12
PF3 (1)
J11
PF2 (1)
L9
fixed
L7
fixed
M7
fixed
L8
fixed
M8
fixed
J1
fixed
Pin Type
O
O
O
I/O
I
I
O
O
O
Buffer Type^a Description
Analog
TTL
TTL
OD
Analog
Analog
TTL
TTL
Analog
12.4-kΩ resistor (1% precision) used internally for
Ethernet PHY.
Ethernet LED 0.
Ethernet LED 1.
MDIO of the Ethernet PHY.
RXIN of the Ethernet PHY.
RXIP of the Ethernet PHY.
TXON of the Ethernet PHY.
TXOP of the Ethernet PHY.
Ethernet PHY XTALN 25-MHz oscillator crystal
output. Leave this pin unconnected when using a
single-ended 25-MHz clock input connected to the
XTALPPHY pin.
July 24, 2012
809
Texas Instruments-Production Data