ML401/ML402/ML403
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Evaluation Platform
User Guide
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Revision History
The following table shows the revision history for this document.
Date Version Revision
09/24/04 1.0 Initial Xilinx release.
10/20/04 1.0.1 Minor edits to text and figures.
02/17/05 1.1 Minor edits:
• Figure 1and Figure 4: Corrected the regulator number for the 6A SWIFT part that goes
to 1.2V. Removed digital supply reference.
• Table 6: Corrected the GPIO LED 3 (DS6) FPGA pin number.
02/28/05 2.0 Renamed title from ML401 Evaluation Platform user guide to ML40x Evaluation Platform
user guide.
Expanded document from ML401-specific to include ML401, ML402, and ML403
platforms.
Minor edits to text and figures.
ML401/ML402/ML403 Evaluation Platform www.xilinx.com UG080 (v2.5) May 24, 2006
Date Version Revision
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10/25/05 2.1 Renamed title from ML40x Evaluation Platform user guide to ML401/ML402/ML403
Evaluation Platform user guide.
Technical edits:
• Features section: Expanded VGA output bullet items.
• 15. VGA Output section: Added Table 13 for the Video DAC connections.
Minor edits to text for clarity.
11/15/05 2.2 Clarified ZBT synchronous RAM size in Features section.
01/13/06 2.3
05/07/06 2.4 Updated
05/24/06 2.5 Updated
Minor edits:
• Deleted “P/N 0402337” (obsolete) from document’s identification.
• Deleted power cord reference from Power supply bullet in Package Contents section.
• Typographical corrections.
USB interface chip criteria in Features section.
USB interface chip criteria in Features section.
Updated 18. ZBT Synchronous SRAM section.
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Table of Contents
www.BDTIC.com/XILINX
Preface: About This Guide
Guide Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Typographical. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Online Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ML401/ML402/ML403 Evaluation Platform
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Package Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Additional Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
1. Virtex-4 FPGA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2. DDR SDRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
3. Differential Clock Input And Output With SMA Connectors . . . . . . . . . . . . . . . . . 16
4. Oscillator Sockets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
5. LCD Brightness and Contrast Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6. DIP Switches (Active-High) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7. User and Error LEDs (Active-High) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8. User Push Buttons (Active-High) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
9. CPU Reset Button (Active-Low) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
10. Expansion Headers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
11. Stereo AC97 Audio Codec . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
12. RS-232 Serial Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
13. 16-Character x 2-Line LCD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
14. IIC Bus with 4-Kb EEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
15. VGA Output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
16. PS/2 Mouse and Keyboard Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
17. System ACE and CompactFlash Connector. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
18. ZBT Synchronous SRAM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
19. Linear Flash Chips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
20. Xilinx XC95144XL CPLD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
21. 10/100/1000 Tri-Speed Ethernet PHY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
22. USB Controller with Host and Peripheral Ports . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
23. Xilinx XCF32P Platform Flash Configuration Storage Device . . . . . . . . . . . . . . . . 28
24. JTAG Configuration Port . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
25. Onboard Power Supplies . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
26. AC Adapter and Input Power Switch/Jack . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
27. Power Indicator LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
28. INIT LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
29. DONE LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
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31. Configuration Address and Mode DIP Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
32. Encryption Key Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
33. Configuration Source Selector Switch. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Configuration Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
JTAG (Parallel Cable IV Cable and System ACE Controller) . . . . . . . . . . . . . . . . . . . . 31
Platform Flash Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Linear Flash + CPLD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
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About This Guide
www.BDTIC.com/XILINX
The ML401/ML402/ML403 evaluation platforms enable designers to investigate and
experiment with features of the Virtex™-4 family of FPGAs. This user guide describes
features and operation of the ML401, ML402, and ML403 (ML40x) evaluation platforms.
Guide Contents
This manual contains the following chapter: “ML401/ML402/ML403 Evaluation
Platform.”
Additional Resources
To find additional documentation, see the Xilinx website at:
http://www.xilinx.com/literature/index.htm.
Preface
Conventions
Typographical
To search the Answer Database of silicon, software, and IP questions and answers, or to
create a technical support WebCase, see the Xilinx website at:
http://www.xilinx.com/support.
This document uses the following conventions. An example illustrates each convention.
The following typographical conventions are used in this document:
Convention Meaning or Use Example
Messages, prompts, and
Courier font
Courier bold
Helvetica bold
program files that the system
displays
Literal commands that you enter
in a syntactical statement
Commands that you select from
a menu
Keyboard shortcuts Ctrl+C
speed grade: - 100
ngdbuild design_name
File → Open
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Italic font
Square brackets [ ]
Convention Meaning or Use Example
Variables in a syntax statement
for which you must supply
values
References to other manuals
Emphasis in text
An optional entry or parameter.
However, in bus specifications,
such as bus[7:0], they are
required.
ngdbuild design_name
See the Development System
Reference Guide for more
information.
If a wire is drawn so that it
overlaps the pin of a symbol, the
two nets are not connected.
ngdbuild [option_name]
design_name
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Braces { }
Vertical bar |
Vertical ellipsis
.
.
.
Horizontal ellipsis . . .
Online Document
The following conventions are used in this document:
Convention Meaning or Use Example
Blue text
Red text
A list of items from which you
must choose one or more
Separates items in a list of
choices
Repetitive material that has
been omitted
Repetitive material that has
been omitted
Cross-reference link to a
location in the current
document
Cross-reference link to a
location in another document
lowpwr ={on|off}
lowpwr ={on|off}
IOB #1: Name = QOUT’
IOB #2: Name = CLKIN’
.
.
.
allow block block_name loc1
loc2 ... locn;
See the section “Additional
Resources” for details.
Refer to “Title Formats” in
Chapter 1 for details.
See Figure 2-5 in the Virtex-II
Handbook.
Blue, underlined text
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Hyperlink to a website (URL)
Go to http://www.xilinx.com
for the latest speed files.
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ML401/ML402/ML403 Evaluation Platform
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Introduction
The ML401/ML402/ML403 evaluation platform enables designers to investigate and
experiment with features of the Virtex™-4 family of FPGAs. This user guide describes
features and operation of the ML401, ML402, and ML403 (ML40x) evaluation platforms.
Features
• Virtex-4 FPGA:
♦ ML401: XC4VLX25-FF668-10
♦ ML402: XC4VSX35-FF668-10
♦ ML403: XC4VFX12-FF668-10
• 64-MB DDR SDRAM, 32-bit interface running up to 266-MHz data rate
• One differential clock input pair and differential clock output pair with SMA
connectors
• One 100-MHz clock oscillator (socketed) plus one extra open 3.3V clock oscillator
socket
• General purpose DIP switches (ML401/ML402 platform), LEDs, and push buttons
• Expansion header with 32 single-ended I/O, 16 LVDS capable differential pairs,
14 spare I/Os shared with buttons and LEDs, power, JTAG chain expansion
capability, and IIC bus expansion
• Stereo AC97 audio codec with line-in, line-out, 50-mW headphone, and
microphone-in (mono) jacks
• RS-232 serial port
• 16-character x 2-line LCD display
• One 4-Kb IIC EEPROM
• VGA output:
♦ ML401: 50 MHz / 24-bit video DAC
♦ ML402: 140 MHz / 24-bit video DAC
♦ ML403: 140 MHz / 15-bit video DAC
• PS/2 mouse and keyboard connectors
• System ACE™ CompactFlash configuration controller with Type I/II CompactFlash
connector
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Package Contents
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• ZBT synchronous SRAM
♦ ML401/ML402: 9 Mb on 32-bit data bus with four parity bits
♦ ML403: 8 Mb on 32-bit data bus with no parity bits
• Intel StrataFlash (or compatible) linear flash chips (8 MB)
• 10/100/1000 tri-speed Ethernet PHY transceiver
• USB interface chip (Cypress CY7C67300) with host and peripheral ports
• Xilinx XC95144XL CPLD to allow linear flash chips to be used for FPGA configuration
• Xilinx XCF32P Platform Flash configuration storage device
• JTAG configuration port for use with Parallel Cable III or Parallel Cable IV cable
• Onboard power supplies for all necessary voltages
• 5V @ 3A AC adapter
• Power indicator LED
• Xilinx Virtex-4 ML40x evaluation platform
• System ACE CompactFlash card
• Power supply
• Carrying case with anti-static foam
• Printed documentation
Additional Information
For current information about your ML40x evaluation platform, visit the corresponding
Web page:
• ML401: http://www.xilinx.com/ml401
• ML402: http://www.xilinx.com/ml402
• ML403: http://www.xilinx.com/ml403
The information includes:
• Current version of this user guide in PDF format
• Example design files for demonstration of Virtex-4 features and technology
• Demonstration hardware and software configuration files for the System ACE
controller, Platform Flash configuration storage device, CPLD, and linear flash chips
• MicroBlaze™ and PowerPC™ 405 (ML403) EDK reference design files
• Full schematics in PDF format and ViewDraw schematic format
• PC board layout in Pads PCB format
• Gerber files in *.pho and *.pdf for the PC board (There are many free or shareware
Gerber file viewers available on the internet for viewing and printing these files)
• Additional documentation, errata, frequently asked questions, and the latest news
For information about the Virtex-4 family of FPGA devices, including product highlights,
data sheets, user guides, and application notes, see the Virtex-4 website at
http://www.xilinx.com/virtex4
and application notes from the component manufacturers.
. Additional information is available from the data sheets
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Block Diagram
Figure 1 shows a block diagram of the ML40x evaluation platform (board).
Introduction
FLASH
FLASH
GPIO
(Button/LED/DIP Switch)
Note: The DIP switch is
not available on the
ML403 board
100 MHz XTAL + User
SMA
(Differiential In/Out Clocks)
Dual PS/2
32
Sync
RAM
32
32
SEL MAP
CF PC
System ACE
Controller
Platform Flash
CPLD
SLV SERIAL
JTAGJTAG JTAG JTAG JTAG
Virtex-4
FPGA
USB
Controller
MSTR SERL
3216
Host
Peripheral
Peripheral
DDR SDRAM
DDR SDRAM
10/100/1000
Enet PHY
AC97
Audio CODEC
Video
RS-232 XCVR
16 X 32
Character LCD
RJ-45
Line Out/
Headphone
Mic In /
Line In
VGA
Serial
User IIC Bus
5V Brick
3A
I/O Expansion Header
5V to USB and PS/2
TPS54310
3A SWIFT
TPS54610
6A SWIFT
TPS54310
3A SWIFT
TPS73118
150mA LDO
2.5V
1.2V
to FPGA Core
3.3V
to FPGA I/O
1.8V
to PROM
IIC EEPROM
TPS51100
3A DDR LDO
2.5V to DDR SDRAM
1.25V
to VTT
Figure 1: Virtex-4 ML40x Evaluation Platform Block Diagram
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Detailed Description
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Detailed Description
The ML40x evaluation platform (board) is shown in Figure 2 (front) and Figure 3, page 13
(back). The numbered sections on the pages following the figures contain details on each
feature.
The ML402 and ML403 boards might differ slightly from the board shown.
Note:
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12
22
24
21
23
32
17
11
19
17292879
20
30
15
1
5
13
31 33 6
26
27
10
2
25
3
7
8
7
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Figure 2: Detailed Description of Virtex-4 ML40x Evaluation Platform Components (Front)
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Note: The label on the CompactFlash (CF) card shipped with your board might differ slightly from
the one shown.
Detailed Description
21
26
15
11
12
2
25
18
22
19
16
4
14
17
24
16
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Figure 3: Detailed Description of Virtex-4 ML40x Evaluation Platform Components (Back)
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1. Virtex-4 FPGA
Configuration
I/O Voltage Rails
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A Xilinx Virtex-4 FPGA is installed on the evaluation platform (the board):
♦ ML401: XC4VLX25-FF668-10
♦ ML402: XC4VSX35-FF668-10
♦ ML403: XC4VFX12-FF668-10
The board supports configuration in all modes: JTAG, Master Serial, Slave Serial, Master
SelectMAP, and Slave SelectMAP modes. See the “Configuration Options,” page 31 section
for more information.
The FPGA has 11 banks of which only the first 10 banks are used. The last bank is powered
but unused. The I/O voltage applied to each bank is summarized in Table 1.
Table 1: I/O Voltage Rail of FPGA Banks
FPGA Bank I/O Voltage Rail
03.3V
13.3V
23.3V
32.5V
43.3V
52.5V
62.5V
7 User selectable as 2.5V or 3.3V using jumper J16
83.3V
a
9
a
10
a. Bank 9 and 10 are non-connected pins in the case of the ML403 with XC4VFX12-FF668.
3.3V
3.3V (Powered but I/O pins are not used)
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Digitally Controlled Impedance (DCI)
Some FPGA banks can support the DCI feature in Virtex-4 FPGAs. Support for DCI is
summarized in Table 2.
Table 2: DCI Capability of FPGA Bank
FPGA Bank DCI Capability
1Not supported.
2Not supported.
3 Optional: User must remove resistors R234 and R235 and must install
resistors R222 and R221.
Note: Use of DCI will disable the use of GPIO LED [2] and [3].
4Not supported.
5 Optional: User must install resistors R224 and R225 to use DCI. In bitgen,
the switch "-g DCIUpdateMode:Quiet" must also be used.
Note: Use of DCI will disable user control of the DDR_CS_N and DDR_CKE
signals.
Detailed Description
6Not supported.
7 Optional: User must install resistors R289 and R290.
Note: This will disable the use of two I/O pins on the expansion connector J5
(pin 38 and 40).
8Yes, 49.9Ω resistors are installed.
a
9
a
10
a. Bank 9 and 10 are non-connected pins in the case of the ML403 board with XC4VFX12-FF668.
Yes, 49.9Ω resistors are installed.
Not supported.
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2. DDR SDRAM
DDR Clock Signal
DDR Loop Signal
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The board contains 64 MB of DDR SDRAM using two Infineon HYB25D256160BT-7 (or
compatible) chips (U4 and U5). Each chip is 16 bits wide and together form a 32-bit data
bus capable of running up to 266 MHz. All DDR SDRAM signals are terminated through
47Ω resistors to a 1.25V VTT reference voltage. The board is designed for matched length
traces across all DDR control and data signals except clocks and the DDR Loop trace (see
“DDR Clock Signal” and “DDR Loop Signal”).
The board can support up to 256 MB of total DDR SDRAM memory if larger chips are
installed. An extra address pin is present on the board to support up to 1-Gb DDR chips.
The DDR clock signal is broadcast from the FPGA as a single differential pair that drives
both DDR chips. The delay on the clock trace is designed to match the delay of the other
DDR control and data signals. The DDR clock is also fed back to the FPGA to allow for
clock deskew using Virtex-4 DCMs. The board is designed so that the DDR clock signal
reaches the FPGA clock feedback pin at the same time as it arrives at the DDR chips.
The DDR loop signal is a trace driven and then received back at the FPGA with a delay
equal to the sum of the trace delays of the clock and DQS signals. This looped trace can be
used in high-speed memory controllers to help compensate for the physical trace delays
between the FPGA and DDR chips.
3. Differential Clock Input And Output With SMA Connectors
High-precision clock signals can be input to the FPGA using differential clock signals
brought in through 50Ω SMA connectors. This allows an external function generator or
other clock source to drive the differential clock inputs that directly feed the global clock
input pins of the FPGA. The FPGA can be configured to present a 100Ω termination
impedance.
A differential clock output from the FPGA is driven out through a second pair of SMA
connectors. This allows the FPGA to drive a precision clock to an external device such as a
piece of test equipment. Table 3 summarizes the differential SMA clock pin connections.
Table 3: Differential SMA Clock Connections
Label Clock Name FPGA Pin
J10 SMA_DIFF_CLK_IN_N C12
J7 SMA_DIFF_CLK_IN_P C13
J8 SMA_DIFF_CLK_OUT_N D7
J9 SMA_DIFF_CLK_OUT_P D8
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4. Oscillator Sockets
The ML40x evaluation platform has two crystal oscillator sockets, each wired for standard
LVTTL-type oscillators. (A 100-MHz oscillator is pre-installed in the X1 SYSCLK socket.)
These connect to the FPGA clock pins as shown in Table 4. The oscillator sockets accept
half-sized oscillators and are powered by the 3.3V supply.
Table 4: Oscillator Socket Connections
Label Clock Name FPGA Pin
X1 SYSCLK AE14
X6 USERCLK AD12
5. LCD Brightness and Contrast Adjustment
Turning potentiometer R1 adjusts the image contrast of the character LCD.
6. DIP Switches (Active-High)
Eight general purpose (active-High) DIP switches are connected to the user I/O pins of the
FPGA. Table 5 summarizes these connections.
Detailed Description
Note:
Table 5: DIP Switches Connections (SW1)
On the ML403 board, these DIP switches are not installed.
SW1 FPGA Pin
1R20
2R19
3T26
4U26
5U23
6V23
7U25
8U24
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7. User and Error LEDs (Active-High)
There are a total of 11* active-High LEDs directly controllable by the FPGA:
• Four green LEDs are general purpose LEDs arranged in a row
• Five green LEDs are positioned next to the North-East-South-West-Center oriented
push buttons (only the center one is cited in Figure 2, page 12)
• Two* red LEDs are intended to be used for signaling error conditions, such as bus
errors, but can be used for any other purpose
Note:
Table 6 summarizes the LED definitions and connections.
Table 6: User and Error LED Connections
*On the ML403 board, the Error 2 LED is not installed.
R
Reference
Designator
DS14 LED North Green E2
DS11 LED East Green E10
DS3 LED South Green A5
DS13 LED West Green F9
DS12 LED Center Green C6
DS15 GPIO LED 0 Green G5
DS4 GPIO LED 1 Green G6
DS5 GPIO LED 2 Green A11
DS6 GPIO LED 3 Green A12
DS205 Error 1 Red V6
DS206* Error 2 Red L24
Note:
*On the ML403 board, the Error 2 LED is not installed.
Label/Definition Color FPGA Pin
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8. User Push Buttons (Active-High)
Five active-High user push buttons are available for general purpose usage and are
arranged in a North-East-South-West-Center orientation (only the center one is cited in
Figure 2, page 12). Table 7 summarizes the user push button connections.
Table 7: User Push Button Connections
Detailed Description
Reference
Designator
SW3 GPIO Switch North E7
SW5 GPIO Switch East F10
SW4 GPIO Switch South A6
SW7 GPIO Switch West E9
SW6 GPIO Switch Center B6
Label/Definition FPGA Pin
9. CPU Reset Button (Active-Low)
The CPU reset button is an active-Low push button intended to be used as a system or user
reset button. This button is wired only to an FPGA I/O pin, so it can also be used as a
general purpose button (see Table 8).
Table 8: CPU Reset Connections
Reference
Designator
SW10 FPGA CPU RESET D6
Label/Definition FPGA Pin
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10. Expansion Headers
The board contains expansion headers for easy expansion or adaptation of the board for
other applications. The expansion connectors use standard 0.1-inch headers. The
expansion connectors contain connections to single-ended and differential FPGA I/Os,
ground, 2.5V/3.3V/5V power, JTAG chain, and the IIC bus.
Differential Expansion I/O Connectors
Header J5 contains 16 pairs of differential signal connections to the FPGA I/Os. This
permits the signals on this connector to carry high-speed differential signals such as LVDS
data. All differential signals are routed with 100Ω differential trace impedance. Matched
length traces are used across all differential signals; consequently, these signals connect to
the FPGA I/O and can also be used as independent single-ended nets. The V
signals can be set to 2.5V or 3.3V by setting jumper J16. Table 9 summarizes the differential
connections on this expansion I/O connector.
Table 9: Expansion I/O Differential Connections (J5)
CCIO
R
of these
Header Pin
(Diff Pair Pos)
J5, Pin 4 J5, Pin 2 HDR2_4 HDR2_2 AA18 Y18
J5, Pin 8 J5, Pin 6 HDR2_28 HDR2_26 Y19 W19
J5, Pin 12 J5, Pin 10 HDR2_20 HDR2_18 Y20 Y21
J5, Pin 16 J5, Pin 14 HDR2_12 HDR2_10 W23 W24
J5, Pin 20 J5, Pin 18 HDR2_8 HDR2_6 Y22 Y23
J5, Pin 24 J5, Pin 22 HDR2_60 HDR2_58 AA19 AA20
J5, Pin 28 J5, Pin 26 HDR2_56 HDR2_54 Y17 AA17
J5, Pin 32 J5, Pin 30 HDR2_52 HDR2_50 AB20 AC20
J5, Pin 36 J5, Pin 34 HDR2_36 HDR2_34 AE21 AD21
J5, Pin 40 J5, Pin 38 HDR2_16 HDR2_14 AE20 AD20
J5, Pin 44 J5, Pin 42 HDR2_64 HDR2_62 AD19 AC19
J5, Pin 48 J5, Pin 46 HDR2_48 HDR2_46 AC18 AB18
J5, Pin 52 J5, Pin 50 HDR2_24 HDR2_22 AF23 AE23
J5, Pin 56 J5, Pin 54 HDR2_44 HDR2_42 AF21 AF22
J5, Pin 60 J5, Pin 58 HDR2_32 HDR2_30 AF19 AF20
Header Pin
(Diff Pair Neg)
Label
(Diff Pair Pos)
Label
(Diff Pair Neg)
FPGA Pin
(Diff Pair Pos)
FPGA Pin
(Diff Pair Neg)
J5, Pin 64 J5, Pin 62 HDR2_40 HDR2_38 AF18 AE18
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Single-Ended Expansion I/O Connectors
Header J6 contains 32 single-ended signal connections to the FPGA I/Os. This permits the
signals on this connector to carry high-speed single-ended data. All single-ended signals
on connector J6 are matched length traces. The V
3.3V by setting jumper J16. Table 10 (spans onto next page) summarizes the single-ended
connections on this expansion I/O connector.
Table 10: Expansion I/O Single-Ended Connections (J6)
Header Pin Label FPGA Pin
J6, Pin 2 HDR1_28 AA24
J6, Pin 4 HDR1_42 V20
J6, Pin 6 HDR1_36 AC25
J6, Pin 8 HDR1_2 AC24
J6, Pin 10 HDR1_52 W25
J6, Pin 12 HDR1_32 AB24
J6, Pin 14 HDR1_26 Y24
Detailed Description
of these signals can be set to 2.5V or
CCIO
J6, Pin 16 HDR1_12 AB23
J6, Pin 18 HDR1_50 W26
J6, Pin 20 HDR1_38 Y26
J6, Pin 22 HDR1_40 Y25
J6, Pin 24 HDR1_22 AA26
J6, Pin 26 HDR1_10 AA23
J6, Pin 28 HDR1_60 AC21
J6, Pin 30 HDR1_24 AB26
J6, Pin 32 HDR1_4 AC23
J6, Pin 34 HDR1_30 AB25
J6, Pin 36 HDR1_6 AD23
J6, Pin 38 HDR1_34 AC26
J6, Pin 40 HDR1_18 AD26
J6, Pin 42 HDR1_16 AC22
J6, Pin 44 HDR1_54 V22
J6, Pin 46 HDR1_56 V21
J6, Pin 48 HDR1_46 W22
J6, Pin 50 HDR1_20 AD25
J6, Pin 52 HDR1_14 AB22
J6, Pin 54 HDR1_48 W21
J6, Pin 56 HDR1_44 W20
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Other Expansion I/O Connectors
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Table 10: Expansion I/O Single-Ended Connections (J6) (Continued)
Header Pin Label FPGA Pin
J6, Pin 58 HDR1_58 AB21
J6, Pin 60 HDR1_8 AD22
J6, Pin 62 HDR1_62 AE24
J6, Pin 64 HDR1_64 AF24
In addition to the high-speed I/O paths, additional I/O signals and power connections are
available to support expansion cards plugged into ML40x board (see Table 11, page 23).
The 14 I/O pins from the general purpose buttons and LEDs on the board are connected to
expansion connector J3. This arrangement permits additional I/Os to be connected to the
expansion connector if the buttons and LEDs are not used. It also allows the expansion
card to utilize the buttons and LEDs on the board.
The expansion connector also allows the board's JTAG chain to be extended onto the
expansion card by setting jumper J26 accordingly.
The IIC bus on the board is also extended onto the expansion connector to allow additional
IIC devices to be bused together. If the expansion IIC bus is to be utilized, the user must
have the IIC pull-up resistors present on the expansion card. Bidirectional level shifting
transistors allow the expansion card to utilize 2.5V to 5V signaling on the IIC bus.
Power supply connections to the expansion connectors provide ground, 2.5V, 3.3V, and 5V
power pins. If the expansion card draws significant power from the ML40x board, the user
must ensure that the total power draw can be supplied by the board.
The ML40x expansion connector is backward compatible with the expansion connectors
on the ML320, ML321, and ML323 boards, thereby allowing their daughter cards to be
used with the ML40x evaluation platform. Table 11, page 23 summarizes the additional
expansion I/O connections.
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Detailed Description
Table 11: Additional Expansion I/O Connections
Header Pin Label FPGA Pin Description
J3, Pin 1 VCC5 N/A 5V Power Supply
J3, Pin 2 VCC5 N/A 5V Power Supply
J3, Pin 3 VCC5 N/A 5V Power Supply
J3, Pin 4 VCC5 N/A 5V Power Supply
J3, Pin 5 NC N/A Not Connected
J3, Pin 6 VCC3V3 N/A 3.3V Power Supply
J3, Pin 7 VCC3V3 N/A 3.3V Power Supply
J3, Pin 8 VCC3V3 N/A 3.3V Power Supply
J3, Pin 9 VCC3V3 N/A 3.3V Power Supply
J3, Pin 10 NC N/A Not Connected
J3, Pin 11 TMS N/A Expansion TMS
J3, Pin 12 TCK N/A Expansion TCK
J3, Pin 13 TDO N/A Expansion TDO
J3, Pin 14 TDI N/A Expansion TDI
J3, Pin 15 LED North E2 LED North
J3, Pin 16 GPIO Switch North E7 GPIO Switch North
J3, Pin 17 LED Center C6 LED Center
J3, Pin 18 GPIO Switch Center B6 GPIO Switch Center
J3, Pin 19 LED West F9 LED West
J3, Pin 20 GPIO Switch West E9 GPIO Switch West
J3, Pin 21 LED South A5 LED South
J3, Pin 22 GPIO Switch South A6 GPIO Switch South
J3, Pin 23 LED East E10 LED East
J3, Pin 24 GPIO Switch East F10 GPIO Switch East
J3, Pin 25 GPIO LED 0 G5 GPIO LED 0
J3, Pin 26 GPIO LED 1 G6 GPIO LED 1
J3, Pin 27 GPIO LED 2 A11 GPIO LED 2
J3, Pin 28 GPIO LED 3 A12 GPIO LED 3
J3, Pin 29 NC N/A Not Connected
J3, Pin 30 NC N/A Not Connected
J3, Pin 31 EXP_IIC_SCL A17 Expansion IIC SCL
J3, Pin 32 EXP_IIC_SDA B17 Expansion IIC SDA
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11. Stereo AC97 Audio Codec
The ML40x board has an AC97 audio codec (U14) to permit audio processing. The
National Semiconductor LM4550 Audio Codec supports stereo 16-bit audio with up to
48-kHz sampling. The sampling rate for record and playback can be different.
The reset for the AC97 codec is shared with the reset signal for the flash memory chips and
Note:
is designed to be asserted at power-on or upon system reset.
Separate audio jacks are provided for Microphone, Line In, Line Out, and Headphone. All
jacks are stereo except for Microphone. The Headphone jack is driven by the audio codec's
internal 50-mW amplifier. Table 12 summarizes the audio jacks.
Table 12: ML40x Audio Jacks
R
Reference
Designator
J11 Microphone - In Mono
J12 Analog Line - In Stereo
J13 Analog Line - Out Stereo
J14 Headphone - Out Stereo
12. RS-232 Serial Port
The ML40x board contains one male DB-9 RS-232 serial port allowing the FPGA to
communicate serial data with another device. The serial port is wired as a host (DCE)
device. Therefore, a null modem cable is normally required to connect the board to the
serial port on a PC. The serial port is designed to operate up to 115200 Bd. An interface chip
is used to shift the voltage level between FPGA and RS-232 signals.
The FPGA is only connected to the TX and RX data pins on the serial port. Therefore, other
Note:
RS-232 signals, including hardware flow control signals, are not used. Flow control should be
disabled when communicating with a PC.
A secondary serial interface is available by using header J27 to support debug of the USB
controller chip. Header J27 brings out RS-232 voltage level signals for ground, TX data, and
RX data.
Function Stereo/Mono
13. 16-Character x 2-Line LCD
The ML40x board has a 16-character x 2-line LCD (Lumex LCM-S01602DTR/M) on the
board to display text information. Potentiometer R1 adjusts the contrast of the LCD. The
data interface to the LCD is connected to the FPGA to support 4-bit mode only. A level
translator chip is used to shift the voltage level between the FPGA and the LCD.
Caution!
protective layer of tape on the top of the screen should be left on for added protection of the
screen's surface.
24 www.xilinx.com ML401/ML402/ML403 Evaluation Platform
Care should be taken not to scratch or damage the surface of the LCD window. The
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14. IIC Bus with 4-Kb EEPROM
An IIC EEPROM (Microchip Technology 24LC04B-I/ST) is provided on the ML40x board
to store non-volatile data such as an Ethernet MAC address. The EEPROM write protect is
tied off on the board to disable its hardware write protect. The IIC bus uses 2.5V signaling
and can operate at up to 400 kHz. IIC bus pull-up resistors are provided on the board.
The IIC bus is extended to the expansion connector so that the user may add additional IIC
devices and share the IIC controller in the FPGA. If the expansion IIC bus is to be utilized,
the user must have additional IIC pull-up resistors present on the expansion card.
Bidirectional level shifting transistors allow the expansion card to utilize 2.5V to 5V
signaling on IIC.
15. VGA Output
The VGA output port (P2) supports an external video monitor. Table 13 lists each board
and its corresponding video DAC chip.
Table 13: Video DAC Connections
Board Speed Description Video Monitor
Detailed Description
ML401 50 MHz
ML402
ML403
Note:
significant bits of digital RGB data are connected to the video DAC. The three least significant bits of
digital RGB data are pulled Low.
140 MHz Analog Devices ADV7125KST140
Due to the reduced pin count on ML403 board’s XC4VFX12 FPGA, only the five most
24-bit video data bus
connected to FPGA
15-bit video data bus
connected to FPGA
16. PS/2 Mouse and Keyboard Ports
The ML40x evaluation platform contains two PS/2 ports: one for a mouse (J17) and the
other for a keyboard (J18). Bidirectional level shifting transistors allow the FPGA's
2.5V I/O to interface with the 5V I/O of the PS/2 ports. The PS/2 ports on the board are
powered directly by the main 5V power jack, which also powers the rest of the board.
Caution!
not overload the AC adapter.
Care must be taken to ensure that the power load of any attached PS/2 devices does
Analog Devices ADV7125KST50
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17. System ACE and CompactFlash Connector
R
The Xilinx System ACE CompactFlash (CF) configuration controller allows a Type I or
Type II CompactFlash card to program the FPGA through the JTAG port. Both hardware
and software data can be downloaded through the JTAG port. The System ACE controller
supports up to eight configuration images on a single CompactFlash card. The
configuration address switches allow the user to choose which of the eight configuration
images to use.
System ACE error and status LEDs indicate the operational state of the System ACE
controller:
• A blinking red error LED indicates that no CompactFlash card is present
• A solid red error LED indicates an error condition during configuration
• A blinking green status LED indicates a configuration operation is ongoing
• A solid green status LED indicates a successful download
Every time a CompactFlash card is inserted into the System ACE socket, a configuration
operation is initiated. Pressing the System ACE reset button re-programs the FPGA.
The board also features a System ACE failsafe mode. In this mode, if the System ACE
controller detects a failed configuration attempt, it automatically reboots back to a
predefined configuration image. The failsafe mode is enabled by inserting two jumpers
across J29 and J30 (in horizontal or vertical orientation).
Caution!
Improper insertion can cause a short with the traces or components on the board.
The System ACE MPU port is connected to the FPGA. This connection allows the FPGA to
use the System ACE controller to reconfigure the system or access the CompactFlash card
as a generic FAT file system. The data bus for the System ACE MPU port is shared with the
USB controller.
For configuration through the System ACE controller, the configuration selector switch
(SW12) must be set to the SYS ACE position.
Use caution when inserting a CompactFlash card with exposed metallic surfaces.
18. ZBT Synchronous SRAM
The ZBT synchronous SRAM (Cypress CY7C1354B or compatible) provides high-speed,
low-latency external memory to the FPGA. The memory is organized as 256K x 36 bits.
This organization provides for a 32-bit data bus with support for four parity bits. On
ML403, the parity bits are not accessible.
The SRAM and FLASH memory share the same data bus.
Note:
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19. Linear Flash Chips
Two 32-Mb linear flash devices (Micron MT28F320J3RG-11 ET) are installed on the board
for a total of 8 MB of flash memory. These flash memory chips are Intel StrataFlash
compatible. This memory provides non-volatile storage of data, software, or bitstreams.
Each flash chip is 16 bits wide and together forms a 32-bit data bus that is shared with
SRAM. In conjunction with a CPLD, the flash memory can also be used to program the
FPGA.
The reset for the AC97 Codec is shared with the reset signal for the flash memory chips and
Note:
is designed to be asserted at power-on or upon system reset.
20. Xilinx XC95144XL CPLD
A Xilinx XC95144XL CPLD is connected to the flash memory and the FPGA configuration
signals. This CPLD connection supports applications where flash memory programs the
FPGA. The CPLD is programmed from the main JTAG chain of the board. The CPLD is
wired so that it can support master or slave configuration in serial or parallel (SelectMAP)
modes. For FPGA configuration via the CPLD and flash, the configuration selector switch
(SW12) must be set to the CPLD Flash position. See the “Configuration Options,” page 31
section for more information.
Detailed Description
21. 10/100/1000 Tri-Speed Ethernet PHY
The ML40x evaluation pla tform contains a Marvell Alaska PHY device (88E1111) operating
at 10/100/1000 Mb/s. The board supports MII, GMII, and RGMII interface modes with the
FPGA. The PHY is connected to a Halo HFJ11-1G01E RJ-45 connector with built-in
magnetics. A 25-MHz crystal supplies the clock signal to the PHY. The PHY is configured
to default at power-on or reset to the following settings (See Table 14). These settings may
be overwritten via software.
Table 14: Board Connections for PHY Configuration Pins
Config Pin
CONFIG0 Ground PHYADR[2] = 0 PHYADR[1] = 0 PHYADR[0] = 0
CONFIG1 Ground ENA_PAUSE = 0 PHYADR[4] = 0 PHYADR[3] = 0
CONFIG2 V
CONFIG3 V
CONFIG4 V
CONFIG5 V
CONFIG6 LED_RX SEL_BDT = 0 INT_POL = 1 75/50Ω = 0
Connection on
Board
2.5V ANEG[3] = 1 ANEG[2] = 1 ANEG[1] = 1
CC
2.5V ANEG[0] = 1 ENA_XC = 1 DIS_125 = 1
CC
2.5V HWCFG_MODE[2] = 1 HWCFG_MODE[1] = 1 HWCFG_MODE[0] = 1
CC
2.5V DIS_FC = 1 DIS_SLEEP = 1 HWCFG_MODE[3] = 1
CC
Bit[2] Definition and
Value
Bit[1] Definition and
Value
Bit[0] Definition and Value
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22. USB Controller with Host and Peripheral Ports
R
A Cypress CY7C67300 embedded USB host controller provides USB connectivity for the
board. The USB controller supports host and peripheral modes of operation. The USB
controller has two serial interface engines (SIE) that can be used independently. SIE1 is
connected to the USB Host 1 connector (J19) and the USB Peripheral 1 connector (J2). SIE2
is connected only to the USB Peripheral 2 connector.
Note:
peripheral connector, but not both at the same time.
The USB controller has an internal microprocessor to assist in processing USB commands.
The firmware for this processor can be stored in its own dedicated IIC EEPROM (U17) or
can be downloaded from a host computer via a peripheral connector. The USB controller's
serial port is connected to J27 through an RS-232 transceiver to assist with debug.
When using SIE1, the port can only be configured at boot-up to use either the host or
23. Xilinx XCF32P Platform Flash Configuration Storage Device
Xilinx XCF32P Platform Flash configuration storage device offers a convenient and
easy-to-use configuration solution for the FPGA. The Platform Flash memory holds up to
four separate configuration images (two images on the ML402 board) that can be accessed
through the configuration address switches. To use the Platform Flash memory to
configure the FPGA, the configuration selector switch (SW12) must be set to the Plat Flash
position.
The Platform Flash memory can program the FPGA by using the master or slave
configuration in serial or parallel (SelectMap) modes. The Platform Flash memory is
programmed using Xilinx iMPACT software through the board’s JTAG chain. See the
“Configuration Options,” page 31 section for more information.
24. JTAG Configuration Port
The JTAG configuration port for the board (J20) allows for device programming and FPGA
debug. The JTAG port supports the Xilinx Parallel Cable III or Parallel Cable IV products.
Third-party configuration products might also be available. The JTAG chain can also be
extended to an expansion board by setting jumper J26 accordingly. See the “Configuration
Options,” page 31 section for more information.
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25. Onboard Power Supplies
Power supply circuitry on the board generates 1.2V, 1.25V, 1.8V, 2.5V, and 3.3V voltages to
power the components on the board. The 1.2V, 2.5V, and 3.3V supplies are driven by
switching power regulators. When these three switching regulators report they are
running at their nominal voltages, the PWR Good LED is turned on.
The diagram in Figure 4 shows the power supply architecture and maximum current
handling on each supply. The typical operating currents are significantly below the
maximum capable. The ML40x board is normally shipped with a 15W power supply
which should be sufficient for most applications.
Detailed Description
5V to USB and PS/2
2.5V
1.2V
to FPGA Core
3.3V
to FPGA I/O
1.8V
to PROM
5V Brick
3A
TPS54310
3A SWIFT
TPS54610
6A SWIFT
TPS54310
3A SWIFT
TPS73118
150mA LDO
Figure 4: Power Supply Diagram
26. AC Adapter and Input Power Switch/Jack
The ML40x board ships with a 15W (5V @ 3A) AC adapter. The power connector is a
2.1 mm x 5.5 mm barrel type plug (center positive). For applications requiring additional
power, such as the use of expansion cards drawing significant power, a larger AC adapter
might be required. If a different AC adapter is used, its load regulation should be less than
10% or better than ±10%. The power switch turns the board on and off by controlling the
supply of 5V to the board.
TPS51100
3A DDR LDO
2.5V to DDR SDRAM
1.25V
to VTT
UG080_04_022305
27. Power Indicator LED
The PWR Good LED lights when the 1.2V, 2.5V, and 3.3V power supplies are all at their
nominal operating conditions. If the PWR Good LED is off, blinking, or glowing lightly,
this indicates a fault condition, such as a short or overload condition, might exist.
28. INIT LED
The INIT LED lights upon power-up to indicate that the FPGA has successfully powered
up and completed its internal power-on process.
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29. DONE LED
30. Program Switch
31. Configuration Address and Mode DIP Switches
R
The DONE LED indicates the status of the DONE pin on the FPGA. It should be lighted
when the FPGA is successfully configured.
This switch grounds the FPGA's Prog pin when pressed. This action clears the FPGA.
This 6-position DIP switch controls the configuration address and FPGA configuration
mode.
The three leftmost switches choose one of eight possible configuration addresses. These
three DIP switches provide the System ACE controller and the CPLD the possibility of
using up to eight different configuration images as set by these three switches. The
Platform Flash memory supports up to four different images.
The three rightmost DIP switches set the FPGA configuration mode pins M2, M1, and M0
as shown in Table 15.
Table 15: Configuration Mode DIP Switch Settings
M2 M1 M0 Mode
000Master Serial
1 1 1 Slave Serial
0 1 1 Master Parallel (SelectMAP)
1 1 0 Slave Parallel (SelectMAP)
101JTAG
32. Encryption Key Battery
An onboard battery holder is connected to the V
encryption key for the FPGA. A 12-mm lithium coin battery (3V), such as Panasonic part
numbers BR1216, CR1216, and BR1225, or any other appropriate 12-mm lithium coin
battery (3V) can be used.
33. Configuration Source Selector Switch
The configuration source selector switch (SW12) selects between System ACE, Platform
Flash, and linear flash/CPLD methods of programming the FPGA. Whichever method is
selected to program the FPGA, make sure the FPGA configuration mode switches are set
appropriately for the desired method of configuration. The PC4 connector allows JTAG
download and debug of the board regardless of the setting of the configuration source
selector switch.
pin of the FPGA to hold the
BATT
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Configuration Options
The FPGA on the ML40x evaluation platform can be configured by four major devices:
• Parallel Cable IV cable (JTAG)
• System ACE controller (JTAG)
• Platform Flash memory
• Linear flash + CPLD
The following section provides an overview of the possible ways the board can be
configured.
JTAG (Parallel Cable IV Cable and System ACE Controller)
The FPGA, Platform Flash memory, and CPLD can be configured through the JTAG port.
The JTAG chain of the board is illustrated in Figure 5.
Configuration Options
PlatFlash FPGASysACE
TSTTDI TDI
PC4
TSTDO
The chain starts at the PC4 connector and goes through the System ACE controller, the
Platform Flash memory, the FPGA, the CPLD, and an optional extension of the chain to the
expansion card. Jumper J26 determines if the JTAG chain should be extended to the
expansion card.
The JTAG chain can be used to program the FPGA and access the FPGA for hardware and
software debug. The JTAG chain is also used to program the Platform Flash memory and
the CPLD.
The PC4 JTAG connection to the JTAG chain allows a host PC to download bitstreams to
the FPGA using the iMPACT software tool. PC4 also allows debug tools such as the
ChipScope™ Pro Analyzer or a software debugger to access the FPGA.
The System ACE controller can also program the FPGA through the JTAG port. Using an
inserted CompactFlash card or Microdrive storage device, configuration information can
be stored and played out to the FPGA. The System ACE controller supports up to eight
configuration images that can selected using the three configuration address DIP switches.
Under FPGA control, the System ACE chip can be instructed to reconfigure to any of the
eight configuration images.
CFGTDO TDO
CFGTDI
Figure 5: JTAG Chain
TDI TDO
CPLD
TDI TDO
Expansion
TDI
TDO
UG080_05_090804
The configuration source selector switch should be in the SYS ACE setting if the use of the
System ACE controller is desired.
When set correctly, the System ACE controller programs the FPGA upon power-up if a
CompactFlash card is present or whenever a CompactFlash card is inserted. Pressing the
System ACE reset button also causes the System ACE controller to program the FPGA if a
CompactFlash card is present.
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Configuration Options
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Platform Flash Memory
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The Platform Flash memory can also be used to program the FPGA. The Platform Flash
memory can hold up to four configuration images, which are selectable by the two least
significant bits of the configuration address DIP switches.
Note:
the least significant bit of the configuration address DIP switches.
The board is wired so the Platform Flash memory can download bitstreams in Master
Serial, Slave Serial, Master SelectMAP (parallel), or Slave SelectMAP (parallel) modes.
Using the iMPACT tool to program the Platform Flash memory, the user has the option to
select which of the four modes to use for programming the FPGA. The configuration mode
DIP switches on the board must be set to match the programming method being used by
the Platform Flash memory.
The configuration source selector switch should be in the Plat Flash setting if the use of
Platform Flash memory is desired.
When set correctly, the Platform Flash memory programs the FPGA upon power-up or
whenever the Prog button is pressed.
ML402 Platform Flash memory can hold two configuration images, which are selectable by
Linear Flash + CPLD
Data stored in the linear flash can be read by the CPLD and used to program the FPGA.
Depending on the logic design in the CPLD, up to eight configuration images can
theoretically be supported.
Note:
The board is wired so the CPLD can download bitstreams via Master Serial, Slave Serial,
Master SelectMAP (parallel), or Slave SelectMAP (parallel) modes. The configuration
mode DIP switches on the board must be set to match the programming method being
used by the CPLD.
Note: ML402 linear flash can hold up to four configuration images.
The configuration source selector switch should be in the CPLD Flash setting if the use of
CPLD + Platform Flash is desired.
When set correctly, the CPLD programs the FPGA upon power-up or whenever the Prog
button is pressed.
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