EVB-LAN9252 Datasheet, PDF(23/55 Page) Microchip Technology – EVB-LAN9252-HBI-SPI-SQI-GPIO EtherCAT® HBI/SPI+GPIO

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EVB-LAN9252 Datasheet, PDF (23/55 Pages) Microchip Technology – EVB-LAN9252-HBI-SPI-SQI-GPIO EtherCAT® HBI/SPI+GPIO

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Board Details & Configuration

2.4.4.3 GPIO INPUT/OUTPUT SELECTION

To enable the SPI+GPIO configuration, the SW11 to SW18 switches must be in the

down position. Additionally, the following switches must be configured to select the

input or output modes, as shown in Table 2-18.

TABLE 2-18: GPIO MODE SWITCH CONFIGURATIONS

Switches

Short Pins Switch Knob Position

SW28 to SW33

SW35 to SW39

SW41 to SW45

SW28 to SW33

SW35 to SW39

SW41 to SW45

1-2

Left Side

(towards center of PCB)

2-3

Right Side

(towards PCB edge)

Mode

INPUT Mode

OUTPUT Mode

Note: For switch P/N: 450301014042, pin 1 is at the middle of the switch. To short

1-2, knob position must be in the 1-3 position, and vice versa.

2.4.4.3.1 GPIO INPUT Mode

In INPUT Mode, Digital I/O values can be selected through dip switches SW34 and

SW40:

â¢ Logic 1 : (Default) SW34 & SW40 Off position. GPI0 to GPI15 tied to pull-up (R90

to R105)

â¢ Logic 0 : The respective knob of 2-way, 8-position dip switch (SW34 & SW40)

need to be moved to ON side. Signals can be selected individually.

2.4.4.3.2 GPIO OUTPUT Mode

In OUTPUT Mode, updated GPO values will be seen on the green LEDs (D7 to D22):

â¢ Logic 1 : LED illuminated (green)

â¢ Logic 0 : LED not illuminated.

Note: The LED (D7 to D22) anode is connected to ASIC.

2.4.5 SoC

The EVB-LAN9252-HBI-SPI-SQI-GPIO supports both an on-board SoC and add-on

SoC. By default, the on-board SoC is enabled. However, an external add-on SoC can

be connected via the add-on SoC headers. The SoC selection is configured via the

SW26 switch, as detailed in the following subsections.

2.4.5.1 SOC SELECTION

The SW26 switch selects the enabled SoC. The SW26 switch knob position must be

down (Text = âPICâ) to select the on-board PIC. If the switch knob position is up (Text =

âPIMâ), then the add-on board/SoC is selected and the on-board PIC is always in the

reset state. Whenever an add-on board/SoC is used, the switch knob must be in the up

position.

TABLE 2-19:

Switch

SW26

SOC SELECTION

Position

Down

Settings

On-board PIC enabled

Add-on board/SoC enabled

ï£ 2015 Microchip Technology Inc.

DS50002333A-page 23

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