EVB-LAN9252-HBI+ EtherCAT® Evaluation Board User’s Guide
DS50002333C-page 20
2015-2016 Microchip Technology Inc.
FIGURE 2-4:
SW11-SW21 DIGIO/HBI/SPI+GPIO MODE SELECTION
2.4.4.1
HBI MODE SELECTION
The LAN9252 supports six HBI modes. These six HBI modes (Multiplexed Modes and
Indexed Modes) can be selected using the SPST switches (P/N: 450301014042-Wurth
Electronics) SW5 through SW9 and SW22 through SW25. Through the switches the
LAN9252 HBI signals are connected to the SoC.
2.4.4.1.1
Multiplexed Modes
The following four HBI Multiplexed Modes are supported:
1. 8-bit Multiplexed single-phase mode
2. 16-bit Multiplexed single-phase mode
3. 8-bit Multiplexed dual-phase mode
4. 16-bit Multiplexed dual-phase mode
Each HBI Multiplexed Mode requires an updated ESI file, EEPROM and PDI driver with
configured SSC to be programmed to the PIC32MX. For additional software informa-
tion, refer to Chapter 3. “Software Development Kit”.
Figure 2-5 details the switch selection for Multiplexed Mode. All four Multiplexed Modes
utilize the same switch positions.
FIGURE 2-5:
MULTIPLEXED HBI MODE SELECTION
Table 2-13 details the switch selection for Multiplexed Mode.
DIGIO/HBI Mode
SPI+GPIO 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.
TABLE 2-13:
MULTIPLEXED HBI MODE SELECTION
Switch
Switch Knob Position
Start
Destination
SW5
Down
A0_AD15
A0_CONFIG3
SW6
Up
RD_RDWR
GPMC_DIR
SW7
Down
ALELO_A1
A1_CONFIG3
SW8
Down
WR_ENB
GPMC_DE0N_CLE
SW9
Down
ALEHI_A2
A2_CONFIG3
SW24
Up
A0_CONFIG3
GPMC_A0_ALE
SW25
Up
A1_CONFIG3
GPMC_A1_ALEHI
