Datasheet

16.3.3.6 LED Indicators
The Ethernet Controller supports two LED signals that can be used to indicate various states of
operation. These signals are mapped to the LED0 and LED1 pins. By default, these pins are
configured as GPIO signals (PF3 and PF2). For the PHY layer to drive these signals, they must be
reconfigured to their alternate function. See “General-Purpose Input/Outputs (GPIOs)” on page 289
for additional details. The function of these pins is programmable via the PHY layer Ethernet PHY
Management Register 23 - LED Configuration (MR23). Refer to page 645 for additional details on
how to program these LED functions.
16.3.4 Interrupts
The Ethernet Controller can generate an interrupt for one or more of the following conditions:
■ A frame has been received into an empty RX FIFO
■ A frame transmission error has occurred
■ A frame has been transmitted successfully
■ A frame has been received with inadequate room in the RX FIFO (overrun)
■ A frame has been received with one or more error conditions (for example, FCS failed)
■ An MII management transaction between the MAC and PHY layers has completed
■ One or more of the following PHY layer conditions occurs:
– Auto-Negotiate Complete
– Remote Fault
– Link Status Change
– Link Partner Acknowledge
– Parallel Detect Fault
– Page Received
– Receive Error
– Jabber Event Detected
16.4 Initialization and Configuration
The following sections describe the hardware and software configuration required to set up the
Ethernet Controller.
16.4.1 Hardware Configuration
Figure 16-4 on page 607 shows the proper method for interfacing the Ethernet Controller to a
10/100BASE-T Ethernet jack.
June 18, 2012606
Texas Instruments-Production Data
Ethernet Controller
NRND: Not recommended for new designs.