EVB-LAN9252 Datasheet, PDF (24/55 Pages) Microchip Technology – EVB-LAN9252-HBI-SPI-SQI-GPIO EtherCAT® HBI/SPI+GPIO

EVB-LAN9252-HBI-SPI-SQI-GPIO EtherCAT® HBI/SPI+GPIO User’s Guide
2.4.5.2 ON-BOARD PIC
By default, the on-board Microchip PIC32MX795F512L (U7) is used as the default
SoC. The LAN9252 can be connected to the PIC using either an HBI or SPI interface.
The selection switches must be configured accordingly to enable the desired interface.
Refer to Section 2.4.4 “HBI/SPI+GPIO Selection” and Section 2.4.4.1 “HBI Mode
Selection” for additional details.
2.4.5.2.1 Reset
SW27 is used to reset the on-board PIC. The LAN9252 can also reset the SoC provid-
ing the reset pin is configured to output mode. For stability, a delay of approximately
180ms is added from the 3.3V o/p to reset release.
2.4.5.2.2 ICSP Header
The on-board PIC programing is performed using the ICSP header J13. Table 2-20
details the ICSP header pinout
TABLE 2-20:
J13 Pin
1
2
3
4
5
6
J13 ICSP HEADER PINOUT
Settings
MLCR
3V3
GND
PGD2
PGC2
NC
2.4.5.2.3 SoC EEPROM
The EVB-LAN9252-HBI-SPI-SQI-GPIO provides an optional SoC EEPROM. Some
SoCs may require an EEPROM. However, the PIC on-board SoC and PIC based
add-on SoC boards do not require this EEPROM.
2.4.5.3 ADD-ON SOC
An add-on board can be attached to the EVB-LAN9252-HBI-SPI-SQI-GPIO to use an
add-on SoC. The add-on board must be mounted to the P1 and P2 connectors (2x23,
100mil normal gold plated berg stick). The SW26 switch must be in the up position
when using an add-on SoC. Additionally, the J10 2-pin jumper must be shorted to route
power to the add-on board from the EVB-LAN9252-HBI-SPI-SQI-GPIO.
2.4.5.4 ESC ID SELECT
The signals shown in Table 2-21 are provided as EtherCAT® ID selection for complex
ESCs. Switches SW7, SW8 and respective pull-up resistors are used to configure the
ID select signals high or low. By default, the EtherCAT® ID values is set to 5. To achieve
this, ID0 and ID2 are high via pull-up resistors, while the remainder of the ID select sig-
nals are low (ID1, ID3-ID15). When required, setting the respective switch knob to the
on position will change the ID select signal to low.
DS50002333A-page 24
 2015 Microchip Technology Inc.