EVB8720 SMSC, EVB8720 Datasheet - Page 9

• Manufacturer Part Number: EVB8720
• Description: Ethernet Modules & Development Tools LAN8720 Design BRD
• Manufacturer: SMSC

Specifications of EVB8720

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

EVB8720 Evaluation Board User Manual
SMSC EVB8720
HEADER
PIN
10
1
2
3
4
5
6
7
8
9
Note 2.4
Note 2.5
Note 2.6
Note 2.7
+3.3V
VDDIO
nRST
No Connect
MDC
MDIO
RXD1/MODE1
RXD0/MODE0
RXER/PHYAD0
RXCLK
(Note
(Note
Resistor R11 acts as a pull-up on the MDIO pin. In most situations, the MAC circuitry
provides this pull-up and R11 is not required.
The functionality of pin 10 depends on the configured mode of operation. Pin 10 will be
driven by REFCLKO in the REFCLKO modes of operation. In the nINT on-board 50MHz
oscillator mode, pin 10 will be driven by the EVB8720’s on-board 50MHz oscillator. In the
nINT off-board 50MHz clock mode, pin 10 is either unconnected (50MHz clock provided
by the partner device via the TXCLK pin) or used to provide the 50MHz clock to the CLKIN
pin of the LAN8720A. Refer to
Configuration (nINTSEL)," on page 6
information.
The functionality of pin 11 depends on the configured mode of operation. Pin 11 will be
driven by nINT in the nINT modes of operation. In the REFCLKO modes of operation, pin
11 will be unconnected. Refer to
Configuration (nINTSEL)," on page 6
information.
When configured for nINT off-board 50MHz clock mode via TXCLK, pin 12 is connected
to the XTAL1/CLKIN pin of the LAN8720A. Pin 12 is unconnected in all other modes of
operation. Refer to
(nINTSEL)," on page 6
DESCRIPTION
2.4)
2.5)
Table 2.7 J1 - 2x10 RMII Header Pinout
USER MANUAL
Section 2.2.3, "Clocking and nINT/REFCLKO Pin Configuration
and the LAN8720A schematic for additional information.
9
HEADER
Section 2.2.3, "Clocking and nINT/REFCLKO Pin
Section 2.2.3, "Clocking and nINT/REFCLKO Pin
PIN
11
12
13
14
15
16
17
18
19
20
and the LAN8720A schematic for additional
and the LAN8720A schematic for additional
nINT
TXCLK
TXEN
Ground
TXD0
Ground
TXD1
Ground
CRS_DV/MODE2
Ground
(Note
(Note
2.6)
DESCRIPTION
2.7)
Revision 1.1 (05-24-10)