EVB9303M SMSC, EVB9303M Datasheet - Page 4

• Manufacturer Part Number: EVB9303M
• Description: Networking Modules & Development Tools LAN9303M 3-Port EVB 10/100 Dual MAC PHY
• Manufacturer: SMSC

Specifications of EVB9303M

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

Revision 1.0 (05-28-09)
2.1
2.1.1
2.1.2
JUMPER
JP1
JP2
JP3
JP4
JP5
JP6
Jumpers
The following tables describe the default settings and jumper descriptions for the EVB9303M. These
defaults are the recommended configurations for evaluation of the LAN9303M. These settings may be
changed as needed, however, any deviation from the default settings should be approached with care
and knowledge of the schematics and datasheet. An incorrect jumper setting may disable the board.
Note: A dashed line in the Settings column indicates the board’s default jumper setting.
JP1 - JP6
JP7 - JP18
Jumpers JP7 through JP18 set various functions of the LAN9303M. They can also be used as GPIOs,
LED drivers, or interrupts. When used as LED drivers, as they are on the EVB9303M, they are
connected a specific way to set the strap value to a “1”, and another way to set the strap value to a
“0”.
circuit as a pull-down. To illuminate LED1, the LAN9303M will drive the cathode of the LED1 low. To
illuminated LED2, the LAN9303M will drive the anode of the LED2 high.
The JP7 - JP18 jumpers must be configured in pairs to identical settings in order to realize the LED1
circuit or the LED2 circuit. The pairings are as follows:
JP7 & JP13
JP8 & JP14
JP9 & JP15
JP10 & JP16
Figure 2.2
Connect +5V DC power
supply
Power switch enable jumper
Connect +3.3V jumper
MDIO pull-up/down jumper
MDC pull-down jumper
I
2
C connect jumper
illustrates the schematic connections with the LED1 circuit as a pull-up, and the LED2
DESCRIPTION
Table 2.1 Jumpers JP1 - JP6
USER MANUAL
4
1---2
1---2
2
1---2
2
1---2
1
1---2
3---4
5---6
7---8
3
3
2
IN: Connect +5V brick output to power
plane
OUT: Disconnect +5V brick power
Enable power switch
Disable power switch, force power ON
always
IN: Connect +3.3V regulator output to
+3.3V power plane
OUT: Disconnect +3.3V regulator
Connect MDIO to 1.5K pull-up to +3.3V
Connect MDIO to 2.5K pull-down to GND
IN: Connect MDC to 10K pull-down
OUT: Disconnect MDC from 10K pull-
down
Pins 1 and 2 are +3.3V
Connect I
Connect I
Pins 7 and 8 are GND
LAN9303M Evaluation Board User Manual
SETTINGS
2
2
C EEPROM to SDA
C EEPROM to SCL
SMSC LAN9303M