diff --git a/.doctrees/environment.pickle b/.doctrees/environment.pickle
index 02f0b190..47dc2ad9 100644
Binary files a/.doctrees/environment.pickle and b/.doctrees/environment.pickle differ
diff --git a/.doctrees/xc9500/jtag.doctree b/.doctrees/xc9500/jtag.doctree
index ce1790e0..b8f1dc84 100644
Binary files a/.doctrees/xc9500/jtag.doctree and b/.doctrees/xc9500/jtag.doctree differ
diff --git a/_sources/xc9500/jtag.rst.txt b/_sources/xc9500/jtag.rst.txt
index 1dd8e822..b8ef7d9f 100644
--- a/_sources/xc9500/jtag.rst.txt
+++ b/_sources/xc9500/jtag.rst.txt
@@ -23,7 +23,7 @@ IR Instruction Register Notes
``11101001`` ``ISPENC`` ``ISPENABLE`` XC9500XL/XV only
``11101010`` ``FPGM`` ``ISPCONFIGURATION``
``11101011`` ``FPGMI`` ``ISPDATA``
-``11101100`` ``FERASE`` ``ISPCONFIGURATION`` XC9500 only
+``11101100`` ``FERASE`` ``ISPCONFIGURATION`` XC9500 revision 2 and up only
``11101100`` ``FERASE`` ``ISPADDRESS`` XC9500XL/XV only
``11101101`` ``FBULK`` ``ISPCONFIGURATION`` XC9500 only
``11101101`` ``FBULK`` ``ISPADDRESS`` XC9500XL/XV only
@@ -58,7 +58,7 @@ IDCODE
The IDCODE for XC9500* devices can be determined as follows:
- bits 0-11: vendor code, ``0x093``
-- bits 12-19: number of FBs in the device
+- bits 12-19: number of FBs in the device encoded as BCD
- bits 20-27: device kind
- ``0x95``: XC9500
@@ -67,6 +67,9 @@ The IDCODE for XC9500* devices can be determined as follows:
- bits 28-31: device revision (varies)
+For XC9500, device revisions older than 2 do not support the ``FBULK`` instruction and
+require using ``FERASE``.
+
Boundary scan register
======================
@@ -184,6 +187,9 @@ There are two instructions that erase fuses:
- ``FBULK``: erases either all main areas on the device at once, or all UIM wire-AND areas
at once
+Note that the ``FBULK`` instruction is not supported on (rarely seen) XC9500 devices with
+revision older than 2.
+
An erase operation is triggered by the following sequence:
1. The DR is written in one of the above opcodes with strobe set to 1 and valid set to 0
diff --git a/searchindex.js b/searchindex.js
index 91f2370a..e0838aa2 100644
--- a/searchindex.js
+++ b/searchindex.js
@@ -1 +1 @@
-Search.setIndex({"docnames": ["index", "xc2c/bitstream", "xc2c/index", "xc2c/intro", "xc2c/jtag", "xc2c/structure", "xc9500/bitstream-xc9500", "xc9500/bitstream-xc9500xl", "xc9500/database", "xc9500/index", "xc9500/intro", "xc9500/jtag", "xc9500/structure", "xpla3/bitstream", "xpla3/index", "xpla3/intro", "xpla3/jtag", "xpla3/structure"], "filenames": ["index.rst", "xc2c/bitstream.rst", "xc2c/index.rst", "xc2c/intro.rst", "xc2c/jtag.rst", "xc2c/structure.rst", "xc9500/bitstream-xc9500.rst", "xc9500/bitstream-xc9500xl.rst", "xc9500/database.rst", "xc9500/index.rst", "xc9500/intro.rst", "xc9500/jtag.rst", "xc9500/structure.rst", "xpla3/bitstream.rst", "xpla3/index.rst", "xpla3/intro.rst", "xpla3/jtag.rst", "xpla3/structure.rst"], "titles": ["Project Combine", "Bitstream structure", "Xilinx Coolrunner II CPLDs", "Introduction", "JTAG interface", "Device structure", "Bitstream structure \u2014 XC9500", "Bitstream structure \u2014 XC9500XL/XV", "Database schema", "Xilinx XC9500, XC9500XL, XC9500XV CPLDs", "Introduction", "JTAG interface", "Device structure", "Bitstream structure", "Xilinx XPLA3 CPLDs", "Introduction", "JTAG interface", "Device structure"], "terms": {"xilinx": [0, 3, 10, 15], "xc9500": [0, 3, 7, 8, 10], "xc9500xl": [0, 8, 10], "xc9500xv": [0, 8, 10, 11, 12], "cpld": [0, 3, 10, 12, 15], "xpla3": [0, 3, 15, 17], "coolrunn": [0, 3, 5], "ii": [0, 3, 5], "write": [1, 4, 5, 12, 13, 16, 17], "me": [1, 4, 5, 11, 13, 16, 17], "introduct": [2, 9, 14], "devic": [2, 6, 7, 9, 11, 14], "packag": [2, 8, 9, 12, 14], "pin": [2, 5, 8, 9, 12, 14, 17], "structur": [2, 8, 9, 14], "overview": [2, 9, 14], "aim": 2, "fb": [2, 3, 8, 9, 10, 11, 14, 15], "input": [2, 3, 9, 10, 11, 14, 15], "product": [2, 9, 14], "term": [2, 9, 14], "sum": [2, 6, 7, 9, 14], "xor": [2, 9], "gate": [2, 3, 9, 17], "regist": [2, 9, 12, 14], "macrocel": [2, 3, 9, 10, 14, 15], "iob": [2, 8, 11, 12, 14], "output": [2, 3, 9, 10, 11, 14], "buffer": [2, 3, 9, 10, 14], "global": [2, 3, 8, 9, 11, 17], 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\ No newline at end of file
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\ No newline at end of file
diff --git a/xc9500/jtag.html b/xc9500/jtag.html
index 47eca057..2c68ce78 100644
--- a/xc9500/jtag.html
+++ b/xc9500/jtag.html
@@ -168,7 +168,7 @@ IR
11101100
|
FERASE
|
ISPCONFIGURATION
|
-XC9500 only |
+XC9500 revision 2 and up only |
11101100
|
FERASE
|
@@ -246,7 +246,7 @@ IDCODE