Datasheet

NetFPGA-1G-CML™ Board Reference Manual
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
Page 7 of 21
Xilinx provides Ethernet MAC IP that will support 10/100/1000 Mb/s via the ISE Design Suite Coregen tool and the
Vivado design suite. Please refer to Xilinx Product Guide PG051 LogiCORE IP Tri-Mode Ethernet MAC for more
information.
LED
Action
Meaning
RJ45 Top
Slow blink
Connection Negotiation
Complete
On
Link activity present
RJ45 Bottom
Off
No link activity
Fast blink
Link activity present
Table 2. RJ-45 Ethernet Connector LED Function.
11 PIC Subsystem
NetFPGA-1G includes a 32-bit PIC microcontroller for managing USB OTG, real-time clock, and secure storage
interfacing. The PIC is pre-programmed with manufacturing test code and an ability to load FPGA bitstreams from
a USB memory stick. It is possible to re-program the PIC to support end-user applications that make use of various
other PIC subsystem features. This may be done via J14 using a PICKit 3 In-Circuit Debugger (Digilent p/n
PG164130).
To run the pre-programmed manufacturing test, first set up the NetFPGA-1G and host PC as described in Appendix
A: Manufacturing Test. When the board is powered on, the factory-loaded PIC firmware will search for the
bitstream "mfg_test.bit" on the USB flash drive and use it to configure the FPGA in slave serial mode. After the
FPGA has been configured, a test menu will be displayed on the terminal emulator window connected to the
PmodUSBUART, and the user can run the tests by following the menu prompts. If the board is set up as described
in Appendix A, all tests should pass.
The address map of the PIC I2C peripherals is shown in Table 3. The PIC is also connected to an MX25L12835E SPI
Serial Flash using general-purpose I/O ports for increased data storage. The flash's pins are connected to the PIC
ports as shown in Table 4.
To program the PIC device, connect a PICkit 3 to the NetFPGA-1G by placing a 1x6 pin header in the zig-zag
connector J14 and connect it to the PICkit 3 using a 6-pin cable. If Digilent's 6-pin Pmod cable is used, the white
indicator dot on the NetFPGA-1G side should be above pin 6, and the dot on the PICkit 3 side will be face-up and
opposite the white arrow on the PICkit 3. The PIC can then be programmed from Microchip's MPLAB X or MPLAB
IPE by selecting the PICkit 3 as the programming tool.
Component Name
PIC I2C Controller
I2C 7-bit Address
AD5274 Digital Rheostat
I2C2
0101110
ADM1177 Hot Swap Controller
I2C2
1011011
ATSHA204 CryptoAuthentication
I2C2
1100100
M41T62 Real-Time Clock
I2C2
1101000
24LC128 Serial EEPROM
I2C1
1010001
Table 3. PIC I
2
C peripheral address map.