Datasheet

 2013-2015 Microchip Technology Inc. DS00001987A-page 11
LAN8740A/LAN8740Ai
TABLE 2-2: LED PINS
Num Pins Name Symbol Buffer Type Description
1 LED 1 LED1 O12 This pin can be used to indicate link activity, link
speed, nINT, or nPME as configured via the LED1
Function Select field of the Wakeup Control and
Status Register (WUCSR).
Note: Refer to Section 3.8.1, "LEDs" and Sec-
tion 3.8.4, "Wake on LAN (WoL)" for
additional LED information.
Interrupt Out-
put
nINT O12 Active low interrupt output.
Note: By default, the nINT signal is output on
the nINT/TXER/TXD4 pin. The nINT
signal can be optionally configured to
output on the LED1 or LED2 pins. Refer
to Section 3.6, "Interrupt Management"
for additional details on device inter-
rupts.
Power Man-
agement Event
Output
nPME O12 Active low Power Management Event (PME) out-
put.
Note: The nPME signal can be optionally con-
figured to output on the LED1, LED2, or
RXD2/nPME/nINTSEL
pins. Refer to
Section 3.8.4, "Wake on LAN (WoL)" for
additional nPME and WoL information.
Regulator Off
Configuration
Strap
REGOFF IS
(PD)
This configuration strap is used to disable the inter-
nal 1.2 V regulator. When the regulator is disabled,
external 1.2 V must be supplied to VDDCR.
• When REGOFF
is pulled high to VDD2A with
an external resistor, the internal regulator is
disabled.
• When REGOFF
is floating or pulled low, the
internal regulator is enabled (default).
See Note 1 for more information on configuration
straps.
Note: Refer to Section 3.7.4, "REGOFF: Inter-
nal +1.2 V Regulator Configuration" for
additional details.