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Anvyl™ FPGA Board Reference Manual
Revised April 11, 2016
This manual applies to the Anvyl rev. B
Overview
The Anvyl FPGA development platform is a
complete, ready-to-use digital circuit
development platform based on a speed grade
-3 Xilinx Spartan-6 LX45 FPGA. The large FPGA,
along with the 100-mbps Ethernet, HDMI
Video, 128MB DDR2 memory, 4.3" LED backlit
LCD touchscreen, 128x32 pixel OLED display,
630 tie-point breadboard, multiple USB HID
controllers, and I
2
S audio codec, makes the
Anvyl an ideal platform for an FPGA learning
station capable of supporting embedded
processor designs based on Xilinx's
MicroBlaze. The Anvyl is compatible with all
Xilinx CAD tools, including ChipScope, EDK,
and the free ISE WebPACK™, so designs can be
completed at no extra cost. The board
dimensions are 27.5cm x 21cm.
The Spartan-6 LX45 is optimized for high
performance logic and offers:
6,822 slices, each containing four
input LUTs and eight flip-flops
2.1Mbits of fast block RAM
four clock tiles (eight DCMs & four
PLLs)
58 DSP slices
500MHz+ clock speeds
The Anvyl board.
A comprehensive collection of board support
IP and reference designs, and a large collection
of add-on boards are available on the Digilent
website. See the Anvyl page at
www.digilentinc.com for more information.
DOC#: 502-258
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
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Anvyl™ FPGA Board Reference Manual
Features include:
Spartan6-LX45 FPGA：XC6SLX45-CSG484-3
128MB DDR2 SDRAM
2MB SRAM
16MB QSPI FLASH for configuration and data storage
10/100 Ethernet PHY
HDMI Video Output
12-bit VGA port
4.3" wide-format vivid color LED backlit LCD screen
128x32 pixel 0.9'' WiseChip/Univision UG-23832HSWEG04 OLED graphic display panel
three two-digit Seven Segment LED displays
I
2
S Audio codec with line-in, line-out, mic, and headphone
100MHz Crystal Oscillator
on-board USB2 ports for programming and USB-HID devices (for mouse/keyboard)
Digilent USB-JTAG circuitry with USB-UART functionality
keypad with 16 labeled keys (0-F)
GPIO: 14 LEDs (10 red, 2 yellow, 2 green), 8 slide switches, 8 DIP switches in 2 groups and 4 push buttons
breadboard with 10 Digital I/O's
32 I/O's routed to 40-pin expansion connector (I/O's are shared with Pmod ports)
seven 12-pin Pmod ports with 56 I/O's total
ships with a 20W power supply and USB cable
1
FPGA Configuration
After being turned on, the FPGA on the Anvyl board must be configured (or programmed) before it can perform
any functions. The FPGA can be configured in three ways: a PC can use the Digilent USB-JTAG circuitry (port J12,
labeled "PROG") to program the FPGA any time power is on, a configuration file stored in the onboard SPI Flash
ROM can be automatically transferred to the FPGA at power-on, or a programming file can be transferred from a
USB memory stick to the USB HID port labeled "Host" (J14).
An on-board mode jumper (JP2) selects between JTAG/USB and ROM programming modes. If JP2 is not loaded, the
FPGA will automatically configure itself from the ROM. If JP2 is loaded, the FPGA will remain idle after power-on
until configured from the JTAG or Serial programming port (USB memory stick).
Both Digilent and Xilinx freely distribute software that can be used to program the FPGA and the SPI ROM.
Programming files are stored within the FPGA in SRAM-based memory cells. This data defines the FPGA's logic
functions and circuit connections, and it remains valid until it is erased by removing power, asserting the PROG_B
input, or until it is overwritten by a new configuration file.
FPGA configuration files transferred via the JTAG port and from a USB stick use the .bit file type, and SPI
programming files use the .mcs file type. Xilinx's ISE WebPack and EDK software can create .bit files from VHDL,
Verilog, or schematic-based source files (EDK is used for MicroBlaze™ embedded processor based designs). Once a
.bit file has been created, the Anvyl's FPGA can be programmed with it over the USB-JTAG circuitry (port J12) using
either Digilent's Adept software or Xilinx's iMPACT software. To generate a .mcs file from a .bit file, use the PROM
File Generator tool within Xilinx's iMPACT software. The .mcs file can then be programmed to the SPI Flash using
iMPACT.
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
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Anvyl™ FPGA Board Reference Manual
The FPGA can also be programmed from a FAT formatted memory stick attached to the USB-HID HOST port (J14) if
the stick contains a single .bit configuration file in the root directory, JP2 is loaded, and board power is cycled. The
FPGA will automatically reject any .bit files that are not built for the proper FPGA.
2
Power Supplies
The Anvyl board requires an external 5V, 4A or greater power source with a center positive, 2.1mm internal
diameter coax plug (a suitable supply is provided as part of the Anvyl kit). Voltage regulator circuits from Analog
Devices create the required 3.3V, 1.8V and 1.2V supplies from the main 5V supply. A power-good LED (LD19),
driven by the wired OR of all the power-good outputs on the supplies, indicates that all supplies are operating
normally. The following devices are present on each rail:
5V : USB-HID connectors, TFT touchscreen controller, HDMI, and expansion connector
3.3V : SRAM, Ethernet PHY I/O, USB-HID controllers, FPGA I/O, oscillators, SPI Flash, Audio codec, TFT
display, OLED display, GPIO, Pmods, and expansion connector
1.8V : DDR2, USB-JTAG/USB-UART controller, FPGA I/O, and GPIO
1.2V : FPGA core and Ethernet PHY core
3
Adept System
Adept has a simplified configuration interface. To program the Anvyl board using Adept, first set up the board and
initialize the software:
plug in and attach the power supply
plug in the USB cable to the PC and to the USB PROG port on the board
start the Adept software
turn ON Anvyl's power switch
wait for the FPGA to be recognized
Use the browse function to associate the desired .bit file with the FPGA, and click on the Program button. The
configuration file will be sent to the FPGA, and a dialog box will indicate whether programming was successful. The
configuration "done" LED will light up after the FPGA has been successfully configured. Before starting the
programming sequence, Adept ensures that any selected configuration files contain the correct FPGA ID code –
this prevents incorrect .bit files from being sent to the FPGA. In addition to the navigation bar and browse and
program buttons, the configuration interface provides an Initialize Chain button, console window, and status bar.
The Initialize Chain button is useful if USB communications with the board have been interrupted. The console
window displays current status, and the status bar shows real-time progress when downloading a configuration
file.
4
DDR2 Memory
A single 1Gbit DDR2 memory chip is driven from the memory controller block in the Spartan-6 FGPA. The DDR2
device, a MT47H64M16HR-25E or equivalent, provides a 16-bit bus and 64M locations. The Anvyl board has been
tested for DDR2 operation at up to an 800MHz data rate. The DDR2 interface follows the pin-out and routing
guidelines specified in the Xilinx Memory Interface Generator (MIG) User Guide. The interface supports SSTL18
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
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Anvyl™ FPGA Board Reference Manual
signaling, and all address, data, clocks, and control signals are delay-matched and impedance-controlled. Two well-
matched DDR2 clock signal pairs are provided so the DDR can be driven with low-skew clocks from the FPGA.
5
Flash Memory
The Anvyl board uses a 128Mbit Numonyx N25Q128 Serial flash memory
device (organized as 16Mbit by 8) for non-volatile storage of FPGA
configuration files. The SPI Flash can be programmed with a .mcs file using
the iMPACT software. An FPGA configuration file requires less than 12Mbits,
leaving 116Mbits available for user data. Data can be transferred to and
from a PC to/from the flash device by user applications, or by facilities built
into the iMPACT PROM file generation software. User designs programmed
into the FPGA can also transfer data to and from the flash.
A board test/demonstration program is loaded into the SPI Flash during
manufacturing.
AB5
AB17
Y17
V13
W13
W17
CS#
SDI/DQ0
SDO/DQ1
WP#/DQ2
HLD#/DQ3
SCK
Spartan-6
SPI Flash
Figure 1. SPI flash interface.
6
Ethernet PHY
The Anvyl board includes an SMSC 10/100 mbps PHY (LAN8720A-CP-TR) paired with a Halo HFJ11-2450E RJ-45
connector. The PHY is connected to the FPGA using a RMII configuration. It is configured to boot into "All Capable,
with Auto Negotiation Enabled" mode on power-on. The data sheet for the SMSC PHY is available from the SMSC
website.
7
HDMI Output
The Anvyl board contains one unbuffered HDMI output port. The unbuffered port uses an HDMI type A connector.
Since the HDMI and DVI systems use the same TMDS signaling standard, a simple adaptor (available at most
electronics stores) can be used to drive a DVI connector from the HDMI output port. The HDMI connector does not
include VGA signals, so analog displays cannot be driven.
The 19-pin HDMI connectors include four differential data channels, five GND connections, a one-wire Consumer
Electronics Control (CEC) bus, a two-wire Display Data Channel (DDC) bus that is essentially an I
2
C bus, a Hot Plug
Detect (HPD) signal, a 5V signal capable of delivering up to 50mA, and one reserved (RES) pin. Of these, the
differential data channels, I
2
C bus, and CEC are connected to the FPGA.
8
VGA
The Anvyl provides a 12bit VGA interface which allows up to 4096 colors displayed on a standard VGA Monitor.
The five standard VGA signals Red, Green, Blue, Horizontal Sync (HS), and Vertical Sync (VS) are routed directly
from the FPGA to the VGA connector. There are four signals routed from the FPGA for each of the standard VGA
color signals resulting in a video system that can produce 4,096 colors. Each of these signals has a series resistor
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
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that when combined in the circuit, form a divider with the 75-ohm termination resistance of the VGA display.
These simple circuits ensure that the video signals cannot exceed the VGA-specified maximum voltage, and result
in color signals that are either fully on (.7V), fully off (0V) or somewhere in between.
Figure 2. VGA interface.
VGA pin assignments
5
10
15
1
6
11
Pin Signal Pin Signal
1
Red
9
NC
2
Green 10
GND
3
Blue
11
NC
4
NC
12
NC
5
GND
13
HS
6
GND
14
VS
7
GND
15
NC
8
GND
5
10
15
1
6
11
VGA signal color mapping
Signal
Red Green Blue
Color
Black
0
0
0
Blue
0
0
1
Green
0
1
0
Cyan
0
1
1
Red
1
0
0
Purple
1
0
1
Yellow
1
1
0
White
1
1
1
Figure 3. HD DB-15 connector, PCB hole pattern, pin assignments, and color-signal mapping.
CRT-based VGA displays use amplitude-modulated moving electron beams (or cathode rays) to display information
on a phosphor-coated screen. LCD displays use an array of switches that can impose a voltage across a small
amount of liquid crystal, thereby changing light permittivity through the crystal on a pixel-by-pixel basis. Although
the following description is limited to CRT displays, LCD displays have evolved to use the same signal timings as
CRT displays (so the "signals" discussion below pertains to both CRTs and LCDs). Color CRT displays use three
electron beams (one for red, one for blue, and one for green) to energize the phosphor that coats the inner side of
the display end of a cathode ray tube (see Fig. 1). Electron beams emanate from "electron guns", which are finely-
pointed heated cathodes placed in close proximity to a positively charged annular plate called a "grid". The
electrostatic force imposed by the grid pulls rays of energized electrons from the cathodes, and those rays are fed
Copyright Digilent, Inc. All rights reserved.
Other product and company names mentioned may be trademarks of their respective owners.
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