Small Footprint RMII 10/100 Ethernet Transceiver with HP Auto-MDIX Support
Datasheet
Table 2.4 Ethernet Pins (continued)
BUFFER
TYPE
NUM PINS
NAME
SYMBOL
DESCRIPTION
Ethernet
TX/RX
Positive
Channel 2
RXP
AIO
Transmit/Receive Positive Channel 2
1
Ethernet
TX/RX
Negative
Channel 2
RXN
AIO
Transmit/Receive Negative Channel 2
1
Table 2.5 Miscellaneous Pins
BUFFER
NUM PINS
NAME
SYMBOL
TYPE
DESCRIPTION
External
Crystal
Input
XTAL1
CLKIN
ICLK
External crystal input
1
External
ICLK
Single-ended clock oscillator input.
Clock Input
Note:
When using a single ended clock
oscillator, XTAL2 should be left
unconnected.
External
Crystal
Output
XTAL2
OCLK
External crystal output
1
1
External
Reset
nRST
nINT
VIS
(PU)
System reset. This signal is active low.
Interrupt
Output
VOD8
(PU)
Active low interrupt output. Place an external
resistor pull-up to VDDIO.
Note:
Refer to Section 3.6, "Interrupt
Management," on page 29 for additional
details on device interrupts.
Note:
Refer to Section 3.8.1.2, "nINTSEL and
LED2 Polarity Selection," on page 37 for
details on how the nINTSEL
configuration strap is used to determine
the function of this pin.
1
Reference
Clock Output
REFCLKO
VO8
This optional 50MHz clock output is derived from
the 25MHz crystal oscillator. REFCLKO is
selectable via the nINTSEL configuration strap.
Note:
Refer Section 3.7.4.2, "REF_CLK Out
Mode," on page 34 for additional details.
Note:
Refer to Section 3.8.1.2, "nINTSEL and
LED2 Polarity Selection," on page 37 for
details on how the nINTSEL
configuration strap is used to determine
the function of this pin.
SMSC LAN8720A/LAN8720Ai
13
Revision 1.4 (08-23-12)
DATASHEET
SMSC [ SMSC CORPORATION ]
