FreeForm/PCI-104
User Manual
Connect Tech, Inc.
42 Arrow Road
Guelph, Ontario
Canada, N1K 1S6
Tel: 519-836-1291
800-426-8979
Fax: 519-836-4878
Email: sales@connecttech.com
support@connecttech.com
URL: http://www.connecttech.com
CTIM-00040 Revision 0.00 January 28, 2008
Connect Tech FreeForm/PCI-104 User Manual
Limited Lifetime Warranty
Connect Tech Inc. provides a Lifetime Warranty for all Connect Tech Inc. products. Should
this product, in Connect Tech Inc.'s opinion, fail to be in good working order during the
warranty period, Connect Tech Inc. will, at its option, repair or replace this product at no
charge, provided that the product has not been subjected to abuse, misuse, accident, disaster or
non Connect Tech Inc. authorized modification or repair.
You may obtain warranty service by delivering this product to an authorized Connect Tech
Inc. business partner or to Connect Tech Inc. along with proof of purchase. Product returned to
Connect Tech Inc. must be pre-authorized by Connect Tech Inc. with an RMA (Return
Material Authorization) number marked on the outside of the package and sent prepaid,
insured and packaged for safe shipment. Connect Tech Inc. will return this product by prepaid
ground shipment service.
The Connect Tech Inc. Lifetime Warranty is defined as the serviceable life of the product. This
is defined as the period during which all components are available. Should the product prove to
be irreparable, Connect Tech Inc. reserves the right to substitute an equivalent product if
available or to retract Lifetime Warranty if no replacement is available.
The above warranty is the only warranty authorized by Connect Tech Inc. Under no
circumstances will Connect Tech Inc. be liable in any way for any damages, including any lost
profits, lost savings or other incidental or consequential damages arising out of the use of, or
inability to use such product.
Copyright Notice
The information contained in this document is subject to change without notice. Connect Tech
Inc. shall not be liable for errors contained herein or for incidental consequential damages in
connection with the furnishing, performance, or use of this material. This document contains
proprietary information that is protected by copyright. All rights are reserved. No part of this
document may be photocopied, reproduced, or translated to another language without the prior
written consent of Connect Tech, Inc.
Copyright © 2008 by Connect Tech, Inc.
Trademark Acknowledgment
Connect Tech, Inc. acknowledges all trademarks, registered trademarks and/or copyrights
referred to in this document as the property of their respective owners.
Not listing all possible trademarks or copyright acknowledgments does not constitute a lack of
acknowledgment to the rightful owners of the trademarks and copyrights mentioned in this
document.
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Customer Support Overview
If you experience difficulties after reading the manual and/or using the product, contact the
Connect Tech reseller from which you purchased the product. In most cases the reseller can
help you with product installation and difficulties.
In the event that the reseller is unable to resolve your problem, our highly qualified support
staff can assist you. Our support section is available 24 hours a day, seven days a week on our
website at:
www.connecttech.com/support/support.asp. See the contact information section below for
more information on how to contact us directly. Our technical support is always free.
Not listing all possible trademarks or copyright acknowledgments does not constitute a lack of
acknowledgment to the rightful owners of the trademarks and copyrights mentioned in this
document.
Contact Information
We offer three ways for you to contact us:
Telephone/Facsimile
Technical Support representatives are ready to answer your call Monday through Friday, from
8:30 a.m. to 5:00 p.m. Eastern Standard Time. Our numbers for calls are:
Telephone: 800-426-8979 (North America only)
Telephone: 519-836-1291 (Live assistance available 8:30 a.m. to 5:00 p.m. EST, Monday to
Friday)
Facsimile: 519-836-4878 (on-line 24 hours)
Email/Internet
You may contact us through the Internet. Our email and URL addresses are:
sales@connecttech.com
support@connecttech.com
www.connecttech.com
Mail/Courier
You may contact us by letter and our mailing address for correspondence is:
Connect Tech, Inc.
42 Arrow Road
Guelph, Ontario
Canada N1K 1S6
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Table of Contents
Limited Lifetime Warranty......................................................................................................... 2
Copyright Notice ........................................................................................................................ 2
Trademark Acknowledgment ..................................................................................................... 2
Customer Support Overview ...................................................................................................... 3
Contact Information........................................................................................................... 3
Table of Contents ....................................................................................................................... 4
List of Tables.............................................................................................................................. 5
List of Figures ............................................................................................................................ 5
Introduction ................................................................................................................................ 6
Features.............................................................................................................................. 6
Hardware Description and Configuration................................................................................... 8
Jumpers and Switches........................................................................................................ 8
Slot Selection (RSW1) .............................................................................................. 8
FPGA Configuration Settings (J1) ............................................................................ 8
Connector Pinouts.............................................................................................................. 9
PCI-104 Header (P1)................................................................................................. 9
JTAG Programming Header (P2).............................................................................. 9
SPI Flash Programming Header (P3)........................................................................ 9
RS-485 Headers (P5, P6)......................................................................................... 10
External Power Connector (P8)............................................................................... 10
GPIO Header (P7) ................................................................................................... 11
Hardware Installation ............................................................................................................... 12
Standalone Operation....................................................................................................... 12
Software Installation................................................................................................................. 12
FPGA Development Environment................................................................................... 12
Drivers and Application Examples .................................................................................. 12
FPGA Configuration ................................................................................................................ 13
Launch Impact ................................................................................................................. 13
Programming the FPGA .................................................................................................. 16
Generating a PROM (MCS) File ..................................................................................... 17
Configuring the FPGA with the SPI Flash....................................................................... 20
Configuring the FPGA / SPI flash Association ....................................................... 20
Programming the Flash ........................................................................................... 22
Reference Design ..................................................................................................................... 24
Functionality.................................................................................................................... 24
Memory Map ................................................................................................................... 24
Implementation................................................................................................................ 25
Specifications ........................................................................................................................... 26
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List of Tables
Table 1: FreeForm/PCI-104 Components .................................................................................. 7
Table 2: Slot Selection (RSW1) ................................................................................................. 8
Table 3: FPGA Configuration Settings (J1) ............................................................................... 8
Table 4: JTAG Programming Header Pinout (P2)...................................................................... 9
Table 5: SPI Flash Programming Header Pinout (P3)................................................................ 9
Table 6: RS-485 Port 1 Pinout (P5).......................................................................................... 10
Table 7: RS-485 Port 2 Pinout (P6).......................................................................................... 10
Table 8: External Power Connector Pinout (P8) ...................................................................... 10
Table 9: GPIO Header Pinout................................................................................................... 11
Table 10: Bar Local Address Space 0 (Bar 2).......................................................................... 24
Table 11: Local Address Space 1 (Bar 3)................................................................................. 25
List of Figures
Figure 1: FreeForm/PCI-104 Block Diagram............................................................................. 6
Figure 2: FreeForm/PCI-104 Layout.......................................................................................... 7
Figure 3: External Power Connection....................................................................................... 10
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Introduction
Connect Tech’s FreeForm/PCI-104 features Xilinx’s Virtex-5 multi-platform FPGA offering users a
flexible, reconfigurable product that also takes advantage of the high bandwidth capabilities of the PCI
bus while communicating with various I/O interfaces.
Features
o PCI-104 form factor – 32-Bit/33MHz
o Xilinx multi-platform Virtex-5 FPGA with 3 million logic gates
o 8MB Flash for embedded code storage
o Designed for embedded processing using MicroBlaze™
o 100MHz input clock
o 128MB DDR2-400 memory
o External 5V power connection for stand alone usage
o 2 x 10/100 Ethernet with modular jacks
o 2 x RS-485 serial interface
o On-board reset switch
o 64 single ended or 32 LVDS general purpose I/O
o Available in industrial temperature range of -40°C to 85°
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Figure 1: FreeForm/PCI-104 Block Diagram
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Figure 2: FreeForm/PCI-104 Layout
Table 1: FreeForm/PCI-104 Components
Connectors Description
P1 PCI-104 connector
P2 JTAG programming header
P3 SPI flash programming header
P5, P6 RS-485 header
P7 GPIO header
P8 External power header
P9 RJ-45 A
P10 RJ-45 B
Jumpers /Switches Description
RSW1 Slot selection
J1 FPGA configuration settings
Components Description
D1-D4 User LEDs
D5 FPGA load complete LED
U4 PLX PCI-local bus bridge
U5 Virtex-5 FPGA
U10 FPGA configuration flash
U11 Embedded code flash
U12, U13 DDR2 memory
U14 Parameter EEPROM
U15, U16 RS-485 transceiver
U17 Dual 10/100 PHY
O1 100MHz oscillator, main clock
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Hardware Description and Configuration
The following sections describe the function of all switches/jumpers and provide details on connector
pinouts.
Jumpers and Switches
Slot Selection (RSW1)
This rotary switch selects a slot position in the PCI-104 stack. When mounting on a PCI adapter
card, ensure slot one is selected.
Table 2: Slot Selection (RSW1)
Position Slot
0,4 0
1,5 1
2,6 2
3,7 3
FPGA Configuration Settings (J1)
Jumper J1 is used to control FPGA configuration.
Table 3: FPGA Configuration Settings (J1)
FPGA waits for configuration over JTAG, using
the cable it is connected to
FPGA reads configuration from SPI flash
FPGA is tri-state, program flash directly
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Note:
Connector Pinouts
PCI-104 Header (P1)
Refer to PCI-104 specifications.
P1 must be connected to a PCI-104 stack supplying
both 3.3V and 5V
JTAG Programming Header (P2)
Use P2 to configure the FPGA via JTAG. Refer to Programming the FPGA for more information.
Power pins are for voltage reference only; they do not provide power to the configuration
circuitry.
Note that the FPGA can always be programmed via JTAG, regardless of the J1 configuration
setting.
Table 4: JTAG Programming Header Pinout (P2)
Pin Signal Direction
1 TRST Input
2 TMS Input
3 TDI Input
4 TDO Output
5 TCK Input
6 GND Reference
7 3.3V Reference
SPI Flash Programming Header (P3)
P3 may be used to directly program the SPI flash, providing that J1 is set correctly to the tri-state
FPGA position. The power pins are for voltage reference only. They do not provide power to the
configuration circuitry.
Table 5: SPI Flash Programming Header Pinout (P3)
Pin Signal Direction
1 SPI_CSN Input
2 SPI_MOSI Input
3 SPI_MISO Output
4 SPI_CLK Input
5 GND Reference
6 3.3V Reference
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RS-485 Headers (P5, P6)
Table 6: RS-485 Port 1 Pinout (P5)
Pin Signal Direction
1 RXD+1 Input
2
3 RXD-1 Input
4
5 TXD+1 Output
6
7 TXD-1 Output
8
9 GND power
10
External Power Connector (P8)
The external connector provides 5V to the power regulation circuitry. In addition, the power
connector enables the 3.3V regulator and provides VIO to the PCI Bridge.
The external power connector should only be used when the FreeForm/PCI-104 is being
programmed out side of a PCI / PCI-104 system.
Table 8: External Power Connector Pinout (P8)
Pin Signal Direction
1 5V Power
2 3.3 enable (connect to 5V) Input
3 VIO (connect to 5V) Power
4 GND Power
It is recommended that a Connect Tech Inc. FreeForm/PCI-104 power supply is used. Orientation
of the power supply connector is important. Ensure that the clip on the cable aligns with the catch
on P8, as shown below.
Table 7: RS-485 Port 2 Pinout (P6)
Pin Signal Direction
1 RXD+2 Input
2
3 RXD-2 Input
4
5 TXD+2 Output
6
7 TXD-2 Output
8
9 GND power
10
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Figure 3: External Power Connection
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GPIO Header (P7)
The GPIO header has been design such that when in differential mode, the positive (P) and
negative (N) signals are adjacent on a standard ribbon cable.
Note that the GPIO voltage level is set via hardware.
FCG001: has L12 populated, enabling 2.5V I/O, including LVDS
FCG002: has L13 populated, enabling 3.3V I/O
Table 9: GPIO Header Pinout
Pin Signal Direction Pin Signal Direction
1 GPION(0) Input/Output 41 GPION(16) Input/Output
2 GPIOP(0) Input/Output 42 GPIOP(16) Input/Output
3 GPION(1) Input/Output 43 GPION(17) Input/Output
4 GPIOP(1) Input/Output 44 GPIOP(17) Input/Output
5 GPION(2) Input/Output 45 GPION(18) Input/Output
6 GPIOP(2) Input/Output 46 GPIOP(18) Input/Output
7 GPION(3) Input/Output 47 GPION(19) Input/Output
8 GPIOP(3) Input/Output 48 GPIOP(19) Input/Output
9 GND power 49 GND Power
10 GND Power 50 GND Power
11 GPION(4) Input/Output 51 GPION(20) Input/Output
12 GPIOP(4) Input/Output 52 GPIOP(20) Input/Output
13 GPION(5) Input/Output 53 GPION(21) Input/Output
14 GPIOP(5) Input/Output 54 GPIOP(21) Input/Output
15 GPION(6) Input/Output 55 GPION(22) Input/Output
16 GPIOP(6) Input/Output 56 GPIOP(22) Input/Output
17 GPION(7) Input/Output 57 GPION(23) Input/Output
18 GPIOP(7) Input/Output 58 GPIOP(23) Input/Output
19 GND Power 59 GND Power
20 GND Power 60 GND Power
21 GPION(8) Input/Output 61 GPION(24) Input/Output
22 GPIOP(8) Input/Output 62 GPIOP(24) Input/Output
23 GPION(9) Input/Output 63 GPION(25) Input/Output
24 GPIOP(9) Input/Output 64 GPIOP(25) Input/Output
25 GPION(10) Input/Output 65 GPION(26) Input/Output
26 GPIOP(10) Input/Output 66 GPIOP(26) Input/Output
27 GPION(11) Input/Output 67 GPION(27) Input/Output
28 GPIOP(11) Input/Output 68 GPIOP(27) Input/Output
29 GND Power 69 GND Power
30 GND Power 70 GND Power
31 GPION(12) Input/Output 71 GPION(28) Input/Output
32 GPIOP(12) Input/Output 72 GPIOP(28) Input/Output
33 GPION(13) Input/Output 73 GPION(29) Input/Output
34 GPIOP(13) Input/Output 74 GPIOP(29) Input/Output
35 GPION(14) Input/Output 75 GPION(30) Input/Output
36 GPIOP(14) Input/Output 76 GPIOP(30) Input/Output
37 GPION(15) Input/Output 77 GPION(31) Input/Output
38 GPIOP(15) Input/Output 78 GPIOP(31) Input/Output
39 GND Power 79 GND Power
40 GND power 80 GND Power
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Hardware Installation
Before installing the FreeForm/PCI-104 into a PC/104 stack, ensure the following:
o Slot selection properly set using the rotary switch RSW1. Note that the FreeForm/PCI-104
address space consumes 32 bytes.
o FPGA configuration jumper J1 is set to read from Flash
Once installed in the system and power is applied, the LED D1 will illuminate to indicate that
FreeForm/PCI-104 is functioning properly.
Standalone Operation
Operating the FreeForm/PCI-104 outside of a PCI-104 stack or a PCI system for extended periods of
time is not recommended. The PCI to local bus bridge (PLX 9056) requires the pull-up / pull-down
resistors provided on a system main board.
Configuring / programming the FreeForm/PCI-104 in standalone mode is acceptable, providing it is not
left powered in that state.
Software Installation
FPGA Development Environment
FreeForm/PCI-104 has been developed with Xilinx WebPACK 9.2, available free of charge at:
http://www.xilinx.com/ise/logic_design_prod/webpack.htm
Drivers and Application Examples
The FreeForm/PCI-104 ships with a CD containing drivers for various operating systems and example
programs to help quickly develop applications. Refer to the CD for installation instructions. For other
operating systems, please check the Connect Tech website’s download zone:
http://www.connecttech.com/asp/Support/DownloadZone.asp
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FPGA Configuration
To configure the FPGA via JTAG, connect the JTAG programming cable to P2 ensuring that all JTAG
signals align correctly. It is important to note that P2 also has the TRST signal on pin 1, which is not part
of Xilinx’s Parallel or USB programming cables.
Launch Impact
1) Open iMPACT, and select create a new project
2) Select configure devices using boundary scan. iMPACT will scan the JTAG chain, and identify
three devices. The first device will be the FPGA.
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3) A prompt will ask for a new configuration file. Select the bitstream from the project directory.
4) A prompt will ask for a BSDL file for device number 2 (PLX PCI9056). Click Yes.
5) Browse to the bsdl folder and select PCI9056BA.bsd
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6) iMPACT will add the device to the JTAG chain.
7) Again, a prompt will ask for device number three (National PHY). Browse to the bsdl folder and
select DP83849IVS.bsd. The device will be added to the JTAG chain.
8) To test stream integrity, right click on the FPGA and select Get Device ID. The console will
report IDCODE = 82a6e093
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Programming the FPGA
1) Right click on device number one (Virtex-5 FPGA), and select program. The following diagram
will appear. Note that verification will only work if an msk file has been created.
2) Select OK to begin programming. After programming is complete, the status window will report:
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Generating a PROM (MCS) File
1) Double click Prom File Formatter in the Flows window.
2) The “Prepare PROM Files” dialog will appear. Ensure that the following settings are selected:
3rd Party SPI PROM
MSC PROM File Format
3) Give the file a name, and click Next.
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4) Select the PROM density (16M) → click Next → click Finish.
5) A prompt will ask to add device to data stream 0. Click OK. Select the bitstream from the project
directory.
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6) Click “No” when asked if another device is to be added. Click “OK” to accept the setup.
7) Double Click “Generate File” from the “iMPACT” processes menu. The status will be reported in
the console.
// *** BATCH CMD : setMode -pff
// *** BATCH CMD : setSubmode -pffparallel
// *** BATCH CMD : setAttribute -configdevice -attr fillValue -value "FF"
// *** BATCH CMD : setAttribute -configdevice -attr swapBit -value "true"
// *** BATCH CMD : setAttribute -configdevice -attr fileFormat -value "mcs"
// *** BATCH CMD : setAttribute -configdevice -attr dir -value "UP"
// *** BATCH CMD : setAttribute -configdevice -attr path -value
"C:\Data\Projects\FreeFormPCI104\hardware\logic\init_plx_GPIO25\/"
// *** BATCH CMD : setAttribute -configdevice -attr name -value "init_plx_GPIO25.cs"
Total configuration bit size = 9371136 bits.
Total configuration byte size = 1171392 bytes.
// *** BATCH CMD : setCurrentDesign -version 0
// *** BATCH CMD : generate -spi
Swap bit can only be disabled in Hex file format only.
0x11dfc0 (1171392) bytes loaded up from 0x0
Using user-specified prom size of 2048K
Writing file
"C:\Data\Projects\FreeFormPCI104\hardware\logic\init_plx_GPIO25\//init_plx_GPIO25.mcs"
.
Writing file
"C:\Data\Projects\FreeFormPCI104\hardware\logic\init_plx_GPIO25\//init_plx_GPIO25.prm"
.
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Configuring the FPGA with the SPI Flash
In previous Xilinx FPGA configurations, the SPI flash would require programming via 3rd party JTAG
test software or through in-system methods. The following features are new to ISE 9.1/9.2, and are only
available on select FPGAs, including the Virtex-5. Your FreeForm/PCI-104 card featuring the Xilinx
Virtex-5 FPGA includes a standard core to enable programming of BPI and SPI flashes over JTAG.
Configuring the FPGA / SPI flash Association
1) Select “Boundary Scan” from the “Flows” tab.
2) Right click on the FPGA and select “Add SPI Flash…”
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3) Browse to the directory containing the previously generated MCS file. Select and click “Open”.
4) The “FPGA SPI Flash Association” window will appear; select “M25P16” (this is the flash device
connected to the FPGA).
5) The flash will be added to the FPGA. Note that this flash is not part of the JTAG chain.
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Programming the Flash
1) Right click the previously associated flash device, and select program.
2) The programming dialog will appear. Select “Verify” and “Erase Before Programming”, then
click OK.
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3) Observe the results in the transcript window.
a. The SPI core is first download to the FPGA device
b. The IDCODE is checked and verified
c. Flash is erased
d. Flash is programmed
After completion of the flash programming, the FPGA will attempt to configure itself from the
flash. If the SPI flash setting is not selected with J1; this step will fail. This does not mean the
flash is not programmed, but rather the verification of the programmed contents has failed.
'1': SPI access core not detected. SPI access core will be downloaded to the
device to enable operations.
PROGRESS_START - Starting Operation.
'1': Downloading core...
done.
'1': Reading status register contents...
INFO:iMPACT:2219 - Status register values:
INFO:iMPACT - 0011 1111 1001 1110 0000 1010 1000 0000
INFO:iMPACT:2492 - '1': Completed downloading core to device.
INFO:iMPACT - '1': Checking done pin....done.
'1': Core downloaded successfully.
'1': IDCODE is '202015' (in hex).
'1': ID Check passed.
'1': IDCODE is '202015' (in hex).
'1': ID Check passed.
'1': Erasing Device.
'1': Programming Device.
'1': Reading device contents...
done.
'1': Verification completed.
INFO:iMPACT - '1': Checking done pin....done.
'1': Programmed successfully.
INFO:iMPACT - '1': Checking done pin....done.
'1': Programmed successfully.
PROGRESS_END - End Operation.
Elapsed time = 179 sec.
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Reference Design
The FreeForm/PCI-104 ships with a pre-installed reference design. This reference design demonstrates
how the FPGA interacts with the PLX 9056 PLX to local bus bridge.
Functionality
o Local bus interface driven at 50MHz
o Slave access to:
o BAR2: 16x32 bit control registers , 16x32 bit user memory
o BAR3: SPI flash programming interface
o Master access to same 16x32 user memory as located in BAR2. Transfer controlled through
slave accessible registers.
o Local bus master configuration of bridge (happens automatically with reset).
o Single-ended GPIO control through registers.
o LED control through registers.
Memory Map
Table 10: Bar Local Address Space 0 (Bar 2)
Local Address
(HEX)
00000000 INTERRUPT_MASK R/W Bit 0: Direct master state machine
00000004 INTERRUPT_SOURCE R Bit 0: Direct master state machine
00000008 REG2 R/W UNUSED
0000000C REG3 R/W UNUSED
00000010 GPIO_P_OUT W Each bit corresponds to one GPIO pin output.
00000014 GPIO_P_TRI W Each bit corresponds to one GPIO pin direction
00000018 GPIO_P_IN R Each bit corresponds to one GPIO pin input
0000001C GPIO_N_OUT W Same as GPIO_N_OUT
00000020 GPIO_N_TRI W Same as GPIO_N_TRI
00000024 GPIO_N_IN R Same as GPIO_N_IN
00000028 DM_STATE R Bits correspond to direct master states, refer to
0000002C USER_LED W Bit 0: Led 1
00000030 DM_CTRL W Bit 0: start operation, when complete must be
00000034 DM_ADDR W Local bus destination address. Must match what
00000038 DM_CNT W Number of DWORDs to transfer
0000003C REVISION R/W Reference design revision
00000040 –
0000007C
Contents Access Description
Bit 1: SPI programmer
Bit 1: SPI programmer
Direction must be set to output
Bit #: GPIO_P(#)
(1=Output)
Bit #: GPIO_P(#)
plx32master.vhd for more details
Bit 1: Led 2
Bit 2: Led 3
Bit 3: Led 4
cleared before another operation can begin
Bit 1: Write = 1, Read = 0
is programmed into PLX configuration register
DMLBAM.
R/W User Memory
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Table 11: Local Address Space 1 (Bar 3)
Local Address Contents Access
10000000 SPI Command RW SPI controller command register, once command is written
10000004 SPI Parameters RW There are four parameters, each one byte
10000008 SPI Status R SPI controller status register
1000000C SPI Result R There are four results, each one byte
10000010 –
100000FC
10000100 –
100001FC
Un addressable N/A N/A
Dual port memory RW 256 Bytes of for flash page storage
operation begins
- 0x04: Param0
- 0x05: Param1
- 0x06: Param2
- 0x07: Param3
- Bit 0: Operation complete
- 0x04: Result0
- 0x05: Result1
- 0x06: Result2
- 0x07: Result3
Description
Implementation
Refer to the FreeForm/PCI-104 VHDL Reference Design Application Note for further information.
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Specifications
Programmable FPGA
Virtex-5 FPGA LX30T
Input Clock
Memory
General Purpose User I/O
Serial
Ethernet
Operating Environment
100MHz
8MB Flash, 128MB DDR2-400
64 single ended I/O
32 LVDS I/O
2 x RS-485
2 x 10Base-T, 100Base-TX
Storage Temperature:
-65°C to 150°C
Operating Temperature:
0°C to 70°C (commercial)
-40°C to 85°C (industrial)
Power Requirements
+3.3V DC and +5V DC, in PCI-104 stack
+5V DC standalone
Current requirements are configuration dependant
Dimensions
Connectors
PC/104-Plus 2.2 compliant
PCI-104 1.0 compliant
Two RJ-45 modular jacks (Ethernet)
Two 2x5 0.100” headers (serial)
One 2x40 0.050 x 0.100” header (general I/O)
One 1x6 0.100” header (flash programming)
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