Mag. conn., #1 |
RX+ |
Input |
Ethernet port, positive line of the differential input signal pair |
Mag. conn., #2 |
RX- |
Input |
Ethernet port, negative line of the differential input signal pair |
Mag. conn., #9 |
TX+ |
Output |
Ethernet port, positive line of the differential output signal pair |
Mag. conn., #10 |
TX- |
Output |
Ethernet port, negative line of the differential output signal pair |
Mag. conn., #11 |
AVCC |
Output |
"Clean" 3.3V power output for magnetics circuitry |
Ethernet port of the EM203A is of 100/10BaseT type. Onboard electronics of the EM203A do not include Ethernet magnetics, so magnetics circuitry must be connected externally to pins TX+, TX-, RX+, RX-, and AVCC. The AVCC pin outputs clean power for the magnetics circuitry, which is very sensitive to noise. The voltage on the AVCC output is 3.3V.
|
Do not interconnect the AVCC and VCC pins! This will permanently damage the EM203A. |
One of the options for implementing the Ethernet front-end is to use RJ203 jack/magnetics module.