Microchip Technology EVB-LAN9252-PICtail, Руководство пользователя

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EVB-LAN9252-PICTAIL™
ADD-ON BOARD
USER’S GUIDE

2015 Microchip Technology Inc. DS50002427A-page 17
Chapter 3. Board Configuration
3.1 STRAPS AND LEDS
The following tables describe the default settings and jumper descriptions for the
EVB-LAN9252-PICtail Add-On Board. These defaults are the recommended configu-
rations for evaluation of the LAN9252. These settings may be changed as needed,
however, any deviation from the defaults settings should be approached with care and
knowledge of the schematics and datasheet. An incorrect jumper setting may disable
the board.
3.1.1 Chip Mode
By default, EVB-LAN9252-PICtail Add-On Board supports only the 2-port mode
(CHIP_MODE0 and CHIP_MODE1 signals pulled down).
3.1.2 EEPROM Size Configuration
By default, the EEPROM size in this EVB-LAN9252-PICtail Add-On Board is 512k.
3.1.3 LEDs
D1 LED is used as a RUN indicator (green) to show the AL status of the EtherCAT State
Machine (ESM), as detailed in
Table 3-1 .
3.2 PROCESS DATA INTERFACE
The Process Data Interface (PDI) is used to communicate with external system-on-chip
(SoC). The EVB-LAN9252-PICtail Add-On Board supports three different PDI configu-
rations:
• HBI (8-bit mode only)
• SPI (default)
• SQI [supported only with MA320003 (PIC32MX795F512L)]
The following sections detail the hardware configurations required for the
EVB-LAN9252-PICtail Add-On Board for all three PDI options.
TABLE 3-1: D1 RUN LED STATUS INDICATOR
State Description
Off The device is in the INITIALIZATION state
Blinking (on 200ms, off 200ms) The device is in the PRE-OPERATIONAL
state
Single Flash (on 200ms, off 1000ms) The device is in the SAFE-OPERATIONAL
state
On The device is in the OPERATIONAL state
Flickering (on 50ms, off 50ms) The device is booting and has not yet entered
the INITIALIZATION state, or the device is in
the BOOTSTRAP state and firmware down-
load is in progress. (Optional. Off when not
implemented.)