Small Footprint MII/RMII 10/100 Ethernet Transceiver for Automotive Applications
Datasheet
Table 2.2 LED Pins
BUFFER
NUM PINS
NAME
SYMBOL
TYPE
DESCRIPTION
LED 1
LED1
O12
Link activity LED indication. This pin is driven
active when a valid link is detected and blinks
when activity is detected.
Note:
Refer to Section 3.8.1, "LEDs," on
page 41 for additional LED information.
Regulator Off
Configuration
Strap
REGOFF
IS
(PD)
This configuration strap is used to disable the
internal 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.
1
When REGOFF is floating or pulled low, the
internal regulator is enabled (default).
See Note 2.2 for more information on
configuration straps.
Note:
Refer to Section 3.7.4, "REGOFF:
Internal +1.2 V Regulator
Configuration," on page 39 for additional
details.
LED 2
LED2
O12
Link speed LED indication. This pin is driven
active when the operating speed is 100 Mbps. It
is inactive when the operating speed is 10 Mbps
or during line isolation.
Note:
Refer to Section 3.8.1, "LEDs," on
page 41 for additional LED information.
nINT/TXER/
TXD4
nINTSEL
IS
(PU)
This configuration strap selects the mode of the
nINT/TXER/TXD4 pin.
Function
Select
Configuration
Strap
When nINTSEL is floated or pulled to VDD2A,
nINT is selected for operation on the
nINT/TXER/TXD4 pin (default).
1
When nINTSEL is pulled low to VSS,
TXER/TXD4 is selected for operation on the
nINT/TXER/TXD4 pin.
See Note 2.2 for more information on
configuration straps.
Note:
Refer to See Section 3.8.1.2, "nINTSEL
and LED2 Polarity Selection," on
page 42 for additional information.
Note 2.2 Configuration strap values are latched on power-on reset and system reset. Configuration
straps are identified by an underlined symbol name. Signals that function as configuration
straps must be augmented with an external resistor when connected to a load. Refer to
Section 3.7, "Configuration Straps," on page 37 for additional information.
Revision 1.1 (05-26-10)
14
SMSC LAN88710AM/LAN88710BM
DATASHEET
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