From 4d3b6e4163449a15563299e12cec64759811b658 Mon Sep 17 00:00:00 2001 From: oharboe Date: Wed, 18 Feb 2009 09:09:11 +0000 Subject: [PATCH] Holger Schurig incorporate some comments from Rick git-svn-id: svn://svn.berlios.de/openocd/trunk@1376 b42882b7-edfa-0310-969c-e2dbd0fdcd60 --- doc/openocd.texi | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) diff --git a/doc/openocd.texi b/doc/openocd.texi index 9f2e82276..6d88d8320 100644 --- a/doc/openocd.texi +++ b/doc/openocd.texi @@ -1509,9 +1509,12 @@ Tap Uses: parameters'', the required parameters are: @comment START REQUIRED @itemize @bullet -@item @b{-irlen NUMBER} - the length in bits of the instruction register -@item @b{-ircapture NUMBER} - the ID code capture command. -@item @b{-irmask NUMBER} - the corresponding mask for the ir register. +@item @b{-irlen NUMBER} - the length in bits of the instruction register, mostly 4 or 5 bits. +@item @b{-ircapture NUMBER} - the IDCODE capture command, usually 0x01. +@item @b{-irmask NUMBER} - the corresponding mask for the IR register. For +some devices, there are bits in the IR that aren't used. This lets you mask +them off when doing comparisons. In general, this should just be all ones for +the size of the IR. @comment END REQUIRED @end itemize An example of a FOOBAR Tap