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Minor tweaks to description of JTAG adapter/dongle issues. 

git-svn-id: svn://svn.berlios.de/openocd/trunk@2729 b42882b7-edfa-0310-969c-e2dbd0fdcd60
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dbrownell 2009-09-19 06:42:50 +00:00
parent 7b3be0e21e
commit 74ae645623
1 changed files with 12 additions and 4 deletions
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16
doc/openocd.texi
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@ -250,12 +250,16 @@ and has a built in relay to power cycle targets remotely.
@section Choosing a Dongle
There are three things you should keep in mind when choosing a dongle.
There are several things you should keep in mind when choosing a dongle.
@enumerate
@item @b{Voltage} What voltage is your target? 1.8, 2.8, 3.3, or 5V? Does your dongle support it?
@item @b{Connection} Printer Ports - Does your computer have one?
@item @b{Connection} Is that long printer bit-bang cable practical?
@item @b{Voltage} What voltage is your target - 1.8, 2.8, 3.3, or 5V?
Does your dongle support it? You might need a level converter.
@item @b{Pinout} What pinout does your target board use?
Does your dongle support it? You may be able to use jumper
wires, or an "octopus" connector, to convert pinouts.
@item @b{Connection} Does your computer have the USB, printer, or
Ethernet port needed?
@item @b{RTCK} Do you require RTCK? Also known as ``adaptive clocking''
@end enumerate
@ -356,6 +360,10 @@ The two well known ``JTAG Parallel Ports'' cables are the Xilnx DLC5
and the MacGraigor Wiggler. There are many clones and variations of
these on the market.
Note that parallel ports are becoming much less common, so if you
have the choice you should probably avoid these adapters in favor
of USB-based ones.
@itemize @bullet
@item @b{Wiggler} - There are many clones of this.