USB Interface Board for use with LMK and LMX

USB Interface Board for use with LMK and LMX
USB <--> uWire Interface Board Instructions
September 17, 2008
National Semiconductor Corporation
Precision Timing Devices
U S B 2 U W I R E - I F AC E
O P E R A T I N G
I N S T R U C T I O N S
Table of Contents
TABLE OF CONTENTS......................................................................................................................2
GENERAL DESCRIPTION...................................................................................................................2
KIT CONTENTS..............................................................................................................................2
INSTALLATION / QUICK START............................................................................................................3
DETAILED USB DRIVER INSTALL GUIDE..............................................................................................4
USING THE USB <--> UWIRE INTERFACE BOARD WITH THE “EXCEPTION” BOARDS.........................................6
TROUBLESHOOTING TIPS..................................................................................................................7
COMMUNICATION TESTS..........................................................................................................................................7
TROUBLESHOOTING.................................................................................................................................................7
KNOWN BUGS.......................................................................................................................................................8
General Description
The USB2UWIRE-IFACE Interface Board simplifies evaluation of National Semiconductor LMX and LMK Evaluation
Boards by enabling the user to establish a USB connection from the CodeLoader 4 programming software to an
evaluation board.
The package consists of a USB cable, a USB <--> uWire interface board, and a 5 inch cable for connecting to an LMX or
LMK evaluation board.
All LMK evaluation boards work with this USB <--> uWire interface board. The following LMX evaluation boards may not
work with this interface: LMX2350, LMX2352, LMX2353, LMX2354, LMX2364, LMX2470, LMX2471, and LMX2604.
The reason for incompatibility is discussed in the section, Using the USB <--> uWire interface board with the “exception”
boards, and includes a work-around solution.
Kit Contents
One (1) USB <--> uWire Interface Board Instructions (this document)
One (1) USB cable
One (1) 5 inch, 10 pin cable CodeLoader jumper cable
One (1) USB <--> uWire Interface Board
Please find CodeLoader4 for download at:
http://www.national.com/analog/timing/codeloader/
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U S B 2 U W I R E - I F AC E
O P E R A T I N G
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I N S T R U C T I O N S
U S B 2 U W I R E - I F AC E
O P E R A T I N G
I N S T R U C T I O N S
Detailed USB Driver Install Guide
Once…
1) CodeLoader has been installed
and
2) the USB <--> uWire interface
board has been connected to the
computer
the PC will automatically detect the
USB <--> uWire interface board.
Figure 4
Press Continue Anyway to install the
driver.
Figure 5
Installation in progress
Figure 6
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U S B 2 U W I R E - I F AC E
O P E R A T I N G
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Installation completed. Press Finish and
then CodeLoader may now be started and
the USB <--> uWire interface board may
be used.
Figure 7
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U S B 2 U W I R E - I F AC E
O P E R A T I N G
I N S T R U C T I O N S
Using the USB <--> uWire interface board with the “exception” boards
The current version v2.0 of the USB <--> uWire interface board will work with all LMK and LMX devices except for:
LMX2350, LMX2352, LMX2353, LMX2354, LMX2364, LMX2470, LMX2471, and LMX2604. The reason these devices
do not work is because one of the programming lines: “Clock Bit”, “Data Bit”, or “LE Bit,” is placed on bit position 10, 11,
12, or 14. The programming lines must be placed in one of the lower 8 positions.
To correct:
1) Change the violating pin position to one of the lower pin positions which is unused. In the LMX2470 example
shown below the “LE Bit” pin can be set to position 1, 3, 4, 5, or 7.
2) Solder a jumper on the evaluation board shorting the new pin position to the old pin position.
Once this has been done, the USB <--> uWire interface board will correctly program the evaluation kit in question.
Figure 8 - Correcting the Port Setup to use the USB <--> uWire interface board with the LMX2470 evaluation board.
6
4\USBdriver” if CodeLoader4 was installed to the default directory.
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O P E R A T I N G
I N S T R U C T I O N S
Troubleshooting, continued
CodeLoader4 Communication Mode
Verify that “USB” is selected in the “Port Setup” tab.
Figure 11 - Selecting "USB" Communication Mode.
CodeLoader4 to USB <--> uWire interface board communications
Verify USB communications by selecting, “USB” → “Version” from the menu (see Figure 12).
Figure 12 - Checking the USB version
Figure 13 - USB communication
successful, version displayed.
If no communication still exists, try...
1. Exiting CodeLoader4.
2. Remove the USB <--> uWire interface board.
3. Reattach the USB <--> uWire interface board, wait for the interface board to be detected.
4. Start CodeLoader4 again.
Only one USB <--> uWire interface board may be attached to a single PC at the same time.
Known Bugs
Plugging in a USB device such as a memory stick may cause CodeLoader 4.1.14 or earlier to crash.
8
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