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-rw-r--r--doc/openocd.texi16
1 files changed, 12 insertions, 4 deletions
diff --git a/doc/openocd.texi b/doc/openocd.texi
index 4db8698b..b944912c 100644
--- a/doc/openocd.texi
+++ b/doc/openocd.texi
@@ -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.