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doc: Figured out meaning of GTS bits
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azonenberg committed May 21, 2017
1 parent 1f6ac71 commit f0199dc
Showing 1 changed file with 10 additions and 1 deletion.
11 changes: 10 additions & 1 deletion doc/xbr/notes.txt
Original file line number Diff line number Diff line change
@@ -132,7 +132,16 @@ Global set/reset mux
Global OE mux
-------------------------
8 bits starting at fuse # 12261
Unknown functionality, but related to I/O cells somehow

Specifies state of the GTS pins
7 GTS0 invert (0 = used as T, 1 = used as !T)
6 GTS0 buffer enable
5 GTS1 invert
4 GTS1 buffer enable
3 GTS2 invert
2 GTS2 buffer enable
1 GTS3 invert
0 GTS3 buffer enable

Global termination mode
-------------------------

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