EVB-LAN9252-HBI+ EtherCAT® Evaluation Board User’s Guide
DS50002333C-page 24
2015-2016 Microchip Technology Inc.
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 “DIGIO/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 if 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
2.4.5.2.3
SoC EEPROM
The EVB-LAN9252-HBI+ 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+ 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+.
2.4.5.4
ESC ID SELECT
The signals shown in Table 2-21 are provided as EtherCAT® ID selection for complex
ESCs. Jumper J20 and respective pull-up resistors are used to configure the ID select
signals high or low. By default, there are no resistors populated and all signals are nei-
ther high or low. When required, populating the respective jumper or resistor will
change the ID select signal to low.
TABLE 2-20:
J13 ICSP HEADER PINOUT
J13 Pin
Settings
1
MLCR
2
3V3
3
GND
4
PGD2
5
PGC2
6
NC
TABLE 2-21:
ID SELECT SIGNALS
ID Selection
Signal
Signal Name
PIC Pin
Number
10k to Pull
High
Pins to Short
for Pull Low
ID0
ID0_SELECT_RB0
25
R123
32:31
ID1
ID_SELECT_RB1
24
R124
30:29
ID2
ID_SELECT_RB2
23
R125
28:27
ID3
ID_SELECT_RB3
22
R126
26:25
ID4
ID_SELECT_RB4
21
R127
24:23