Microchip Technology EVB-LAN9252-ADD-ON, Руководство пользователя

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EVB-LAN9252-ADD-ON for Beckhoff EL9800 User’s Guide
DS50002356B-page 14
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2015 Microchip Technology Inc.
2.3 CLOCK
LAN9252 requires a fixed-frequency 25MHz clock source for use by the internal clock
oscillator and PLL. This is typically provided by attaching a 25MHz crystal to the OSCI
and OSCO pins.
2.4 CONFIGURATION
The following sub-sections describe the various board features and configuration set-
tings. A top view of the EVB-LAN9252-ADD-ON REV-B is displayed in
Figure 2-1 .
FIGURE 2-1: EVB-LAN9252-ADD-ON TOP VIEW WITH CALLOUTS
The EVB-LAN9252-ADD-ON connects with the Beckhoff EL9800 EtherCAT Base
Board as depicted in
Figure 2-2 .
39 SOF 46 OE_EXT
40 OUTVALID 47 NC
41 SYNC/LATCH0 48 VCC_5V_IN
42 NC 49 3V3
43 LATCH_IN 50 VCC_5V_IN
44 SYNC/LATCH1 51 TP3
45 GND 52 TP2
TABLE 2-1: EVB-LAN9252 CONNECTOR J202 PIN OUT (CONTINUED)
Pin
Number
Signal
Pin
Number
Signal
Note: Pins 53-56 are NC.
Board to Board Connector (J202)
DIGIO/SPI
Selection Switches
Microchip
LAN9252
25 Mhz
Crystal
LDO EEPROM
Port 1
(with integrated
magnetics &LEDs)
Port 0
(with integrated
magnetics &LEDs)