If not using external power supply for VBAT, ensure that J5 is connected with Shunt. If external power supply is being used for VBAT (Up to 48V), disconnect the shunt on J5, and supply the desired VBAT voltage on the pin 1 of J5 (left side in the figure below)

Figure 2-2 J5 Jumper for VBAT

Configure J3 and J4 jumper to Drop Node or End Node

1. Drop Node: Connect pin 1 to 2

2. End Node: Connect pin 2 to 3

Figure 2-3 J3/J4 Jumpers for Drop/End Nodes

Configure the 555EVM into correct strap setting

1. The Node ID given in the silkscreen is incorrect. The correct Node ID switches are SW2(2), SW1(2), SW1(1) respectively. The table given below shows the Node ID for different strap combinations.

   Node ID	SW2(2)	SW1(2)	SW1(1)
   0	0	0	0
   1	0	0	1
   2	0	1	0
   3	0	1	1
   4	1	0	0
   5	1	0	1
   6	1	1	0
   7	1	1	1

2. Active/ Isolated Mode: SW2(1)

   Device Mode	SW2(1)
   Active Mode	0
   Isolate Mode	1

3. Figure 2-4 Strap Switches Functionality

Connect the EVM to the controller using the SPI interface. The required connections are shown below, additional pins, like RST, INH, WAKE, and GPIOs can also be connected as needed.

1. Vin must be supplied with 5V. On-board LDOs then use this input voltage to generate voltages required to power various parts of the EVM

Figure 2-5 Required Connections

Use Screw Terminal (J10) for 10Base-T1S connection